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317 lines
170 KiB
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317 lines
170 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
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<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="G21C" definition-exists="true" date-revised="2018-08-01" status="published"><classification-symbol>G21C</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>NUCLEAR REACTORS </text><reference><text>fusion reactors, hybrid fission-fusion reactors <class-ref scheme="cpc">G21B</class-ref>; nuclear explosives <class-ref scheme="cpc">G21J</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="warning"><note-paragraph warning-type="ipc-not-used">The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups: <table><row><entry><class-ref scheme="ipc">G21C19/33</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">G21C19/34</class-ref></entry></row></table></note-paragraph><note-paragraph>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="G21C1/00" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G21C1/00" definition-exists="true" ipc-concordant="G21C1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G21C1/00</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Reactor types</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C1/02" definition-exists="false" ipc-concordant="G21C1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G21C1/02</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Fast fission reactors, i.e. reactors not using a moderator </text><CPC-specific-text><text>; Metal cooled reactors; Fast breeders</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C1/022" definition-exists="false" ipc-concordant="G21C1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G21C1/022</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>characterised by the design or properties of the core</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C1/024" definition-exists="false" ipc-concordant="G21C1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the core is divided in zones with fuel and zones with breeding material</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C1/026" definition-exists="false" ipc-concordant="G21C1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reactors not needing refueling, i.e. reactors of the type breed-and-burn, e.g. travelling or deflagration wave reactors or seed-blanket reactors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C1/028" definition-exists="false" ipc-concordant="G21C1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>cooled by a pressurised coolant </text><reference><text>cooling arrangements <class-ref scheme="cpc">G21C15/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C1/03" definition-exists="false" ipc-concordant="G21C1/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>cooled by a coolant not essentially pressurised, e.g. pool-type reactors</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C1/04" definition-exists="false" ipc-concordant="G21C1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G21C1/04</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Thermal reactors </text><CPC-specific-text><text>; Epithermal reactors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C1/06" definition-exists="false" ipc-concordant="G21C1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Heterogeneous reactors, i.e. in which fuel and moderator are separated</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C1/07" definition-exists="false" ipc-concordant="G21C1/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pebble-bed reactors</text></title-part><title-part><text>Reactors with granular fuel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C1/08" definition-exists="false" ipc-concordant="G21C1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>moderator being highly pressurised, e.g. boiling water reactor, integral super-heat reactor, pressurised water reactor </text><reference><text><class-ref scheme="cpc">G21C1/22</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C1/082" definition-exists="false" ipc-concordant="G21C1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reactors where the coolant is overheated</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C1/084" definition-exists="false" ipc-concordant="G21C1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Boiling water reactors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C1/086" definition-exists="false" ipc-concordant="G21C1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pressurised water reactors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C1/088" definition-exists="false" ipc-concordant="G21C1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G21C1/088</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>Inherently safe boiling water reactors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C1/09" definition-exists="false" ipc-concordant="G21C1/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pressure regulating arrangements, i.e. pressurisers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C1/10" definition-exists="false" ipc-concordant="G21C1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>moderator and coolant being different or separated</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G21C1/12" definition-exists="false" ipc-concordant="G21C1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G21C1/12</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>moderator being solid, e.g. Magnox reactor </text><CPC-specific-text><text>or gas-graphite reactor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C1/14" definition-exists="false" ipc-concordant="G21C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>moderator being substantially not pressurised, e.g. swimming-pool reactor </text><reference><text><class-ref scheme="cpc">G21C1/22</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C1/16" definition-exists="false" ipc-concordant="G21C1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G21C1/16</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>moderator and coolant being different or separated, e.g. sodium-graphite reactor </text><CPC-specific-text><text>, sodium-heavy water reactor or organic coolant-heavy water reactor</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G21C1/18" definition-exists="false" ipc-concordant="G21C1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>coolant being pressurised</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G21C1/20" definition-exists="true" ipc-concordant="G21C1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G21C1/20</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>moderator being liquid, e.g. pressure-tube reactor</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C1/22" definition-exists="false" ipc-concordant="G21C1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using liquid or gaseous fuel</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C1/24" definition-exists="false" ipc-concordant="G21C1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Homogeneous reactors, i.e. in which the fuel and moderator present an effectively homogeneous medium to the neutrons</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C1/26" definition-exists="false" ipc-concordant="G21C1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Single-region reactors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C1/28" definition-exists="false" ipc-concordant="G21C1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Two-region reactors</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C1/30" definition-exists="false" ipc-concordant="G21C1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G21C1/30</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Subcritical reactors </text><CPC-specific-text><text>; Experimental reactors other than swimming-pool reactors or zero-energy reactors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C1/303" definition-exists="true" ipc-concordant="G21C1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G21C1/303</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>Experimental or irradiation arrangements inside the reactor </text><reference><text>irradiation loops <class-ref scheme="cpc">G21C1/306</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C1/306" definition-exists="false" ipc-concordant="G21C1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/306</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Irradiation loops</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C1/32" definition-exists="false" ipc-concordant="G21C1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G21C1/32</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Integral reactors, i.e. reactors wherein parts functionally associated with the reactor but not essential to the reaction, e.g. heat exchangers, are disposed inside the enclosure with the core </text><reference><text><class-ref scheme="cpc">G21C1/02</class-ref> - <class-ref scheme="cpc">G21C1/30</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C1/322" definition-exists="false" ipc-concordant="G21C1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/322</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the heat exchanger is disposed above the core</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C1/324" definition-exists="false" ipc-concordant="G21C1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/324</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the heat exchanger is disposed beneath the core</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C1/326" definition-exists="false" ipc-concordant="G21C1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/326</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the heat exchanger is disposed next to or beside the core</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C1/328" definition-exists="false" ipc-concordant="G21C1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C1/328</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the prime mover is also disposed in the vessel</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G21C3/00" definition-exists="true" ipc-concordant="G21C3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reactor fuel elements and their assemblies</text></title-part><title-part><text>Selection of substances for use as reactor fuel elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C3/02" definition-exists="false" ipc-concordant="G21C3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fuel elements </text><CPC-specific-text><reference><text>manufacture thereof <class-ref scheme="cpc">G21C21/02</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C3/04" definition-exists="false" ipc-concordant="G21C3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/041" definition-exists="false" ipc-concordant="G21C3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for removal of gases from fuel elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/042" definition-exists="false" ipc-concordant="G21C3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fuel elements comprising casings with a mass of granular fuel with coolant passages through them</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/044" definition-exists="false" ipc-concordant="G21C3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fuel elements with porous or capillary structure</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/045" definition-exists="false" ipc-concordant="G21C3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G21C3/045</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>Pellets</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/047" definition-exists="false" ipc-concordant="G21C3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G21C3/047</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>Pellet-clad interaction</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/048" definition-exists="false" ipc-concordant="G21C3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G21C3/048</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>Shape of pellets</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/06" definition-exists="false" ipc-concordant="G21C3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Casings</text></title-part><title-part><text>Jackets</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/07" definition-exists="false" ipc-concordant="G21C3/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by their material, e.g. alloys</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/08" definition-exists="false" ipc-concordant="G21C3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>provided with external means to promote heat-transfer, e.g. fins, baffles</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/10" definition-exists="false" ipc-concordant="G21C3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G21C3/10</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>End closures </text><CPC-specific-text><text>; Means for tight mounting therefor</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G21C3/105" definition-exists="false" ipc-concordant="G21C3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Flattened end-closures</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/12" definition-exists="false" ipc-concordant="G21C3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means forming part of the element for locating it within the reactor core </text><CPC-specific-text><reference><text>means not forming part of the element <class-ref scheme="cpc">G21C5/06</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/14" definition-exists="false" ipc-concordant="G21C3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G21C3/14</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Means forming part of the element for inserting it into, or removing it from, the core</text></title-part><title-part><text>Means for coupling adjacent elements </text><CPC-specific-text><text>, e.g. to form a stringer</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/16" definition-exists="false" ipc-concordant="G21C3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of the construction within the casing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/17" definition-exists="false" ipc-concordant="G21C3/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for storage or immobilisation of gases in fuel elements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/18" definition-exists="false" ipc-concordant="G21C3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Internal spacers or other non-active material within the casing, e.g. compensating for expansion of fuel rods or for compensating excess reactivity </text><reference><text>interlayers <class-ref scheme="cpc">G21C3/20</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/20" definition-exists="false" ipc-concordant="G21C3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with coating on fuel or on inside of casing</text></title-part><title-part><text>with non-active interlayer between casing and active material </text><CPC-specific-text><text>with multiple casings or multiple active layers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C3/22" definition-exists="false" ipc-concordant="G21C3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with fissile or breeder material in contact with coolant</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C3/24" definition-exists="false" ipc-concordant="G21C3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with fissile or breeder material in fluid form within a non-active casing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C3/26" definition-exists="false" ipc-concordant="G21C3/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with fissile or breeder material in powder form within a non-active casing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C3/28" definition-exists="false" ipc-concordant="G21C3/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with fissile or breeder material in solid form within a non-active casing</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C3/30" definition-exists="false" ipc-concordant="G21C3/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Assemblies of a number of fuel elements in the form of a rigid unit</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C3/32" definition-exists="false" ipc-concordant="G21C3/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bundles of parallel pin-, rod-, or tube-shaped fuel elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/3206" definition-exists="false" ipc-concordant="G21C3/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/3206</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means associated with the fuel bundle for filtering the coolant, e.g. nozzles, grids</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/3213" definition-exists="false" ipc-concordant="G21C3/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/3213</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for the storage or removal of fission gases </text><reference><text>means for the storage of fission gases in the elements <class-ref scheme="cpc">G21C3/16</class-ref>; means for the removal of fission gases from elements <class-ref scheme="cpc">G21C3/04</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/322" definition-exists="false" ipc-concordant="G21C3/322" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/322</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means to influence the coolant flow through or around the bundles</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/3225" definition-exists="false" ipc-concordant="G21C3/322" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G21C3/3225</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>by waterrods</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/324" definition-exists="false" ipc-concordant="G21C3/324" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/324</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coats or envelopes for the bundles</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/3245" definition-exists="false" ipc-concordant="G21C3/324" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/3245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>made of moderator material</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/326" definition-exists="false" ipc-concordant="G21C3/326" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/326</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising fuel elements of different composition</text></title-part><title-part><text>comprising, in addition to the fuel elements, other pin-, rod-, or tube-shaped elements, e.g. control rods, grid support rods, fertile rods, poison rods or dummy rods</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/3262" definition-exists="false" ipc-concordant="G21C3/326" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G21C3/3262</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>Enrichment distribution in zones</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G21C3/3265" definition-exists="false" ipc-concordant="G21C3/326" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G21C3/3265</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>Radial distribution</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G21C3/3267" definition-exists="false" ipc-concordant="G21C3/326" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G21C3/3267</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>Axial distribution</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/328" definition-exists="false" ipc-concordant="G21C3/328" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/328</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Relative disposition of the elements in the bundle lattice</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/33" definition-exists="false" ipc-concordant="G21C3/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/33</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supporting or hanging of elements in the bundle </text><reference><text>spacer grids <class-ref scheme="cpc">G21C3/34</class-ref></text></reference></title-part><title-part><text>Means forming part of the bundle for inserting it into, or removing it from, the core</text></title-part><title-part><text>Means for coupling adjacent bundles</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/3305" definition-exists="false" ipc-concordant="G21C3/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/3305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lower nozzle</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/331" definition-exists="false" ipc-concordant="G21C3/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/331</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Comprising hold-down means, e.g. springs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/3315" definition-exists="false" ipc-concordant="G21C3/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/3315</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Upper nozzle</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/332" definition-exists="false" ipc-concordant="G21C3/332" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/332</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supports for spacer grids</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/334" definition-exists="false" ipc-concordant="G21C3/334" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/334</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Assembling </text><CPC-specific-text><text>, maintenance or repair of</text></CPC-specific-text><text> the bundles </text><CPC-specific-text><reference><text>assembling, maintenance or repair of other reactor components <class-ref scheme="cpc">G21C19/207</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/335" definition-exists="false" ipc-concordant="G21C3/335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/335</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Exchanging elements in irradiated bundles</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/336" definition-exists="false" ipc-concordant="G21C3/336" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/336</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spacer elements for fuel rods in the bundle </text><reference><text>spacer grids <class-ref scheme="cpc">G21C3/34</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/338" definition-exists="false" ipc-concordant="G21C3/338" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/338</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Helicoidal spacer elements</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/34" definition-exists="false" ipc-concordant="G21C3/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spacer grids</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/3408" definition-exists="false" ipc-concordant="G21C3/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/3408</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Compact spacer grids, e.g. made of a plate or a blade</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/3416" definition-exists="false" ipc-concordant="G21C3/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/3416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Spacer grids formed by metallic wires, e.g. springs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/3424" definition-exists="false" ipc-concordant="G21C3/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/3424</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fabrication of spacer grids</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/3432" definition-exists="false" ipc-concordant="G21C3/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G21C3/3432</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>Grids designed to influence the coolant, i.e. coolant mixing function</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/344" definition-exists="false" ipc-concordant="G21C3/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/344</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>formed of assembled tubular elements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/348" definition-exists="false" ipc-concordant="G21C3/348" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/348</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>formed of assembled non-intersecting strips</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/352" definition-exists="false" ipc-concordant="G21C3/352" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/352</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>formed of assembled intersecting strips</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/356" definition-exists="false" ipc-concordant="G21C3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/356</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>being provided with fuel element supporting members</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G21C3/3563" definition-exists="false" ipc-concordant="G21C3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/3563</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Supporting members formed only by deformations in the strips</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G21C3/3566" definition-exists="false" ipc-concordant="G21C3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/3566</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Supporting members formed only of elements fixed on the strips</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C3/36" definition-exists="false" ipc-concordant="G21C3/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Assemblies of plate-shaped fuel elements or coaxial tubes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C3/38" definition-exists="false" ipc-concordant="G21C3/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fuel units consisting of a single fuel element in a supporting sleeve </text><CPC-specific-text><text>or in another supporting element</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C3/40" definition-exists="false" ipc-concordant="G21C3/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structural combination of fuel element with thermoelectric element for direct production of electric energy from fission heat </text><reference><text>for temperature measurement <class-ref scheme="cpc">G21C17/10</class-ref> </text></reference><CPC-specific-text><text>or with another arrangement for direct production of electric energy, e.g. a thermionic device </text><reference><text>combination with thermoelements for temperature measurements <class-ref scheme="cpc">G21C17/102</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C3/42" definition-exists="true" ipc-concordant="G21C3/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Selection of substances for use as reactor fuel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C3/44" definition-exists="false" ipc-concordant="G21C3/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fluid or fluent reactor fuel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/46" definition-exists="false" ipc-concordant="G21C3/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aqueous compositions</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/48" definition-exists="false" ipc-concordant="G21C3/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>True or colloidal solutions of the active constituent</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/50" definition-exists="false" ipc-concordant="G21C3/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Suspensions of the active constituent</text></title-part><title-part><text>Slurries</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/52" definition-exists="false" ipc-concordant="G21C3/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquid metal compositions</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/54" definition-exists="false" ipc-concordant="G21C3/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fused salt, oxide or hydroxide compositions</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/56" definition-exists="false" ipc-concordant="G21C3/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gaseous compositions</text></title-part><title-part><text>Suspensions in a gaseous carrier</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C3/58" definition-exists="false" ipc-concordant="G21C3/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Solid reactor fuel </text><CPC-specific-text><text>Pellets made of fissile material</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/60" definition-exists="false" ipc-concordant="G21C3/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Metallic fuel</text></title-part><title-part><text>Intermetallic dispersions</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C3/62" definition-exists="false" ipc-concordant="G21C3/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ceramic fuel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/623" definition-exists="false" ipc-concordant="G21C3/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/623</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Oxide fuels</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/626" definition-exists="false" ipc-concordant="G21C3/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/626</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coated fuel particles</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C3/64" definition-exists="false" ipc-concordant="G21C3/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C3/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ceramic dispersion fuel, e.g. cermet</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G21C5/00" definition-exists="true" ipc-concordant="G21C5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C5/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Moderator or core structure</text></title-part><title-part><text>Selection of materials for use as moderator</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C5/02" definition-exists="false" ipc-concordant="G21C5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C5/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C5/04" definition-exists="false" ipc-concordant="G21C5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C5/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spatial arrangements allowing for Wigner growth</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C5/06" definition-exists="true" ipc-concordant="G21C5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C5/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for locating or supporting fuel elements </text><CPC-specific-text><reference><text>means forming part of the element <class-ref scheme="cpc">G21C3/12</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C5/08" definition-exists="false" ipc-concordant="G21C5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G21C5/08</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Means for preventing undesired asymmetric expansion of the complete structure </text><CPC-specific-text><text>; Stretching devices, pins</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C5/10" definition-exists="false" ipc-concordant="G21C5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C5/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for supporting the complete structure </text><CPC-specific-text><reference><text>arrangements for supporting vessels and core-structures <class-ref scheme="cpc">G21C13/024</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C5/12" definition-exists="false" ipc-concordant="G21C5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C5/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by composition, e.g. the moderator containing additional substances which ensure improved heat resistance of the moderator </text><CPC-specific-text><reference><text>purification of fluid moderators during the operation of the reactor <class-ref scheme="cpc">G21C19/30</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C5/123" definition-exists="false" ipc-concordant="G21C5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C5/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Moderators made of organic materials</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C5/126" definition-exists="false" ipc-concordant="G21C5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G21C5/126</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>Carbonic moderators </text><reference><text>carbon and graphite in general <class-ref scheme="cpc">C01B32/00</class-ref>; refractory carbon-bulbs <class-ref scheme="cpc">C04B35/00</class-ref>; carbon electrodes <class-ref scheme="cpc">C25B</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C5/14" definition-exists="false" ipc-concordant="G21C5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C5/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by shape</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C5/16" definition-exists="false" ipc-concordant="G21C5/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C5/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shape of its constituent parts</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C5/18" definition-exists="false" ipc-concordant="G21C5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C5/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the provision of more than one active zone</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C5/20" definition-exists="false" ipc-concordant="G21C5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C5/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein one zone contains fissile material and another zone contains breeder material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C5/22" definition-exists="false" ipc-concordant="G21C5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C5/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein one zone is a superheating zone</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G21C7/00" definition-exists="true" ipc-concordant="G21C7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of nuclear reaction</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C7/005" definition-exists="false" ipc-concordant="G21C7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Flux flattening</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C7/02" definition-exists="false" ipc-concordant="G21C7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using self-regulating properties of reactor materials, </text><CPC-specific-text><text>e.g. Doppler effect</text></CPC-specific-text><reference><text>arrangements that involve temperature stability <class-ref scheme="cpc">G21C7/32</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C7/04" definition-exists="false" ipc-concordant="G21C7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of burnable poisons </text><reference><text>burnable poisons in fuel rods <class-ref scheme="cpc">G21C3/326</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C7/06" definition-exists="false" ipc-concordant="G21C7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C7/08" definition-exists="false" ipc-concordant="G21C7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by displacement of solid control elements, e.g. control rods</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C7/10" definition-exists="false" ipc-concordant="G21C7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Construction of control elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C7/103" definition-exists="false" ipc-concordant="G21C7/103" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/103</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control assemblies containing one or more absorbants as well as other elements, e.g. fuel or moderator elements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C7/107" definition-exists="false" ipc-concordant="G21C7/107" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control elements adapted for pebble-bed reactors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C7/11" definition-exists="false" ipc-concordant="G21C7/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Deformable control elements, e.g. flexible, telescopic, articulated</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C7/113" definition-exists="false" ipc-concordant="G21C7/113" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/113</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control elements made of flat elements</text></title-part><title-part><text>Control elements having cruciform cross-section</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C7/117" definition-exists="false" ipc-concordant="G21C7/117" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/117</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Clusters of control rods</text></title-part><title-part><text>Spider construction</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C7/12" definition-exists="false" ipc-concordant="G21C7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for moving control elements to desired position </text><reference><text>dropping rods in an emergency <class-ref scheme="cpc">G21C9/02</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C7/14" definition-exists="false" ipc-concordant="G21C7/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mechanical drive arrangements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C7/16" definition-exists="false" ipc-concordant="G21C7/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hydraulic or pneumatic drive</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C7/18" definition-exists="false" ipc-concordant="G21C7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for obtaining differential movement of control elements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C7/20" definition-exists="false" ipc-concordant="G21C7/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G21C7/20</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Disposition of shock-absorbing devices </text><reference><text>shock-absorbers in general <class-ref scheme="cpc">F16F</class-ref> </text></reference><CPC-specific-text><text>; Braking arrangements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C7/22" definition-exists="false" ipc-concordant="G21C7/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G21C7/22</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>by displacement of a fluid or fluent neutron-absorbing material </text><CPC-specific-text><text>, e.g. by adding neutron-absorbing material to the coolant</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C7/24" definition-exists="false" ipc-concordant="G21C7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Selection of substances for use as neutron-absorbing material</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C7/26" definition-exists="false" ipc-concordant="G21C7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by displacement of the moderator or parts thereof </text><CPC-specific-text><text>by changing the moderator concentration</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C7/27" definition-exists="false" ipc-concordant="G21C7/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/27</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spectral shift control</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C7/28" definition-exists="false" ipc-concordant="G21C7/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by displacement of the reflector or parts thereof</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C7/30" definition-exists="false" ipc-concordant="G21C7/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by displacement of the reactor fuel or fuel elements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C7/32" definition-exists="false" ipc-concordant="G21C7/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by varying flow of coolant through the core </text><CPC-specific-text><text>by adjusting the coolant or moderator temperature</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C7/34" definition-exists="false" ipc-concordant="G21C7/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by utilisation of a primary neutron source</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C7/36" definition-exists="false" ipc-concordant="G21C7/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C7/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control circuits</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G21C9/00" definition-exists="true" ipc-concordant="G21C9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G21C9/00</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Emergency protection arrangements structurally associated with the reactor </text><CPC-specific-text><text>, e.g. safety valves provided with pressure equalisation devices</text></CPC-specific-text><reference><text>emergency cooling arrangements <class-ref scheme="cpc">G21C15/18</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C9/001" definition-exists="false" ipc-concordant="G21C9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G21C9/001</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>against explosions, e.g. blast shields</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C9/002" definition-exists="false" ipc-concordant="G21C9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C9/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>against Na- or Ka- reactions</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C9/004" definition-exists="false" ipc-concordant="G21C9/004" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C9/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pressure suppression</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C9/008" definition-exists="false" ipc-concordant="G21C9/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C9/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by rupture-discs or -diaphragms</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C9/012" definition-exists="false" ipc-concordant="G21C9/012" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C9/012</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by thermal accumulation or by steam condensation, e.g. ice condensers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C9/016" definition-exists="false" ipc-concordant="G21C9/016" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C9/016</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Core catchers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C9/02" definition-exists="false" ipc-concordant="G21C9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C9/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse; </text><CPC-specific-text><text>Control elements having arrangements activated in an emergency</text></CPC-specific-text><reference><text>control elements <u>per se</u> <class-ref scheme="cpc">G21C7/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C9/022" definition-exists="false" ipc-concordant="G21C9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C9/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reactor fuses</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C9/024" definition-exists="false" ipc-concordant="G21C9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C9/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rupture diaphragms</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C9/027" definition-exists="false" ipc-concordant="G21C9/027" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C9/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by fast movement of a solid, e.g. pebbles</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C9/033" definition-exists="false" ipc-concordant="G21C9/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C9/033</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by an absorbent fluid</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C9/04" definition-exists="false" ipc-concordant="G21C9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C9/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for suppressing fires </text><CPC-specific-text><text>Earthquake protection</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C9/06" definition-exists="false" ipc-concordant="G21C9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C9/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for preventing accumulation of explosives gases, e.g. recombiners</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G21C11/00" definition-exists="true" ipc-concordant="G21C11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C11/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shielding structurally associated with the reactor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C11/02" definition-exists="false" ipc-concordant="G21C11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G21C11/02</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Biological shielding </text><reference><text>in general <class-ref scheme="cpc">G21F</class-ref> </text></reference><CPC-specific-text><text>; Neutron or gamma shielding</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C11/022" definition-exists="false" ipc-concordant="G21C11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C11/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>inside the reactor vessel</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C11/024" definition-exists="false" ipc-concordant="G21C11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C11/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>structurally combined with the casing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C11/026" definition-exists="false" ipc-concordant="G21C11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C11/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in apertures or channels through a wall</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C11/028" definition-exists="false" ipc-concordant="G21C11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C11/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the form or by the material</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C11/04" definition-exists="false" ipc-concordant="G21C11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C11/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>on waterborne craft</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C11/06" definition-exists="false" ipc-concordant="G21C11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C11/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reflecting shields, i.e. for minimising loss of neutrons</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C11/08" definition-exists="false" ipc-concordant="G21C11/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C11/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Thermal shields</text></title-part><title-part><text>Thermal linings, i.e. for dissipating heat from gamma radiation which would otherwise heat an outer biological shield </text><CPC-specific-text><text>Thermal insulation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C11/081" definition-exists="false" ipc-concordant="G21C11/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C11/081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of a non-metallic layer of insulating material</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C11/083" definition-exists="false" ipc-concordant="G21C11/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C11/083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of one or more metallic layers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C11/085" definition-exists="false" ipc-concordant="G21C11/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C11/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting exclusively of several metallic layers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C11/086" definition-exists="false" ipc-concordant="G21C11/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C11/086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of a combination of non-metallic and metallic layers, e.g. metal-sand-metal-concrete</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C11/088" definition-exists="false" ipc-concordant="G21C11/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C11/088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of a stagnant or a circulating fluid</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G21C13/00" definition-exists="false" ipc-concordant="G21C13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pressure vessels</text></title-part><title-part><text>Containment vessels</text></title-part><title-part><text>Containment in general </text><reference><text>for chemical or physical processes <class-ref scheme="cpc">B01J3/00</class-ref>; pressure vessels in general <class-ref scheme="cpc">F16J12/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C13/02" definition-exists="false" ipc-concordant="G21C13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C13/022" definition-exists="false" ipc-concordant="G21C13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ventilating arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C13/024" definition-exists="false" ipc-concordant="G21C13/024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supporting constructions for pressure vessels or containment vessels</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C13/028" definition-exists="false" ipc-concordant="G21C13/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Seals, e.g. for pressure vessels or containment vessels</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C13/0285" definition-exists="false" ipc-concordant="G21C13/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/0285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for container apertures</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C13/032" definition-exists="false" ipc-concordant="G21C13/032" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/032</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Joints between tubes and vessel walls, e.g. taking into account thermal stresses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C13/036" definition-exists="true" ipc-concordant="G21C13/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/036</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the tube passing through the vessel wall, i.e. continuing on both sides of the wall</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C13/04" definition-exists="false" ipc-concordant="G21C13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for expansion and contraction</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C13/06" definition-exists="false" ipc-concordant="G21C13/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sealing-plugs </text><reference><text>for pressure vessels in general <class-ref scheme="cpc">F16J13/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C13/063" definition-exists="false" ipc-concordant="G21C13/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G21C13/063</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>Seals for closures or for rotatable closures</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C13/067" definition-exists="false" ipc-concordant="G21C13/067" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/067</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for tubes, e.g. standpipes</text></title-part><title-part><text>Locking devices for plugs</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C13/0675" definition-exists="false" ipc-concordant="G21C13/067" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/0675</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Seals for the plugs</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C13/073" definition-exists="false" ipc-concordant="G21C13/073" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/073</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Closures for reactor-vessels, e.g. rotatable</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C13/0735" definition-exists="false" ipc-concordant="G21C13/073" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/0735</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Seals for closures or for rotatable closures</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C13/08" definition-exists="false" ipc-concordant="G21C13/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels characterised by the material</text></title-part><title-part><text>Selection of materials for pressure vessels</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C13/087" definition-exists="false" ipc-concordant="G21C13/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/087</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Metallic vessels</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C13/0875" definition-exists="false" ipc-concordant="G21C13/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/0875</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tube-type vessels, e.g. for not essentially pressurised coolants</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C13/093" definition-exists="false" ipc-concordant="G21C13/093" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/093</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Concrete vessels</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C13/0933" definition-exists="false" ipc-concordant="G21C13/093" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/0933</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>made of prestressed concrete</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C13/0936" definition-exists="false" ipc-concordant="G21C13/093" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/0936</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Particulars concerning prestressing devices and cables</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C13/10" definition-exists="false" ipc-concordant="G21C13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C13/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for preventing contamination in the event of leakage, </text><CPC-specific-text><text>e.g. double wall</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G21C15/00" definition-exists="true" ipc-concordant="G21C15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling arrangements within the pressure vessel containing the core</text></title-part><title-part><text>Selection of specific coolants</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C15/02" definition-exists="false" ipc-concordant="G21C15/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements or disposition of passages in which heat is transferred to the coolant; </text><CPC-specific-text><text>Coolant flow control devices </text><reference><text><class-ref scheme="cpc">G21C19/04</class-ref> takes precedence; coolant flow control through fuel assemblies, e.g. flow restrictors <class-ref scheme="cpc">G21C3/322</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C15/04" definition-exists="false" ipc-concordant="G21C15/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>from fissile or breeder material </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G21C3/32</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C15/06" definition-exists="false" ipc-concordant="G21C15/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in fuel elements</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C15/08" definition-exists="false" ipc-concordant="G21C15/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>from moderating material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C15/10" definition-exists="false" ipc-concordant="G21C15/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>from reflector or thermal shield</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C15/12" definition-exists="false" ipc-concordant="G21C15/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>from pressure vessel</text></title-part><title-part><text>from containment vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C15/14" definition-exists="false" ipc-concordant="G21C15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>from headers</text></title-part><title-part><text>from joints in ducts</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C15/16" definition-exists="false" ipc-concordant="G21C15/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising means for separating liquid and steam </text><reference><text>separating in general <class-ref scheme="cpc">B01D</class-ref>; steam traps <class-ref scheme="cpc">F16D</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C15/18" definition-exists="true" ipc-concordant="G21C15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Emergency cooling arrangements</text></title-part><title-part><text>Removing shut-down heat</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C15/182" definition-exists="true" ipc-concordant="G21C15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising powered means, e.g. pumps</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C15/185" definition-exists="false" ipc-concordant="G21C15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G21C15/185</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>using energy stored in reactor system</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C15/187" definition-exists="false" ipc-concordant="G21C15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G21C15/187</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>using energy from the electric grid</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C15/20" definition-exists="false" ipc-concordant="G21C15/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Partitions or thermal insulation between fuel channel and moderator</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C15/22" definition-exists="false" ipc-concordant="G21C15/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structural association of coolant tubes with headers </text><reference><text>joints of tubes in general <class-ref scheme="cpc">F16L</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C15/24" definition-exists="false" ipc-concordant="G21C15/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Promoting flow of the coolant </text><reference><text>electrodynamic pumps <class-ref scheme="cpc">H02K44/02</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C15/243" definition-exists="false" ipc-concordant="G21C15/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/243</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for liquids</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C15/247" definition-exists="false" ipc-concordant="G21C15/247" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/247</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for liquid metals</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C15/25" definition-exists="false" ipc-concordant="G21C15/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/25</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using jet pumps</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C15/253" definition-exists="false" ipc-concordant="G21C15/253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/253</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for gases, e.g. blowers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C15/257" definition-exists="false" ipc-concordant="G21C15/257" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/257</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using heat-pipes </text><CPC-specific-text><reference><text>in general <class-ref scheme="cpc">F28D</class-ref>, <class-ref scheme="cpc">F28F</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C15/26" definition-exists="false" ipc-concordant="G21C15/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by convection, e.g. using chimneys, using divergent channels</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C15/28" definition-exists="false" ipc-concordant="G21C15/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C15/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Selection of specific coolants </text><reference><text>if serving as the moderator <class-ref scheme="cpc">G21C5/12</class-ref>; compositions <u>per se</u> <class-ref scheme="cpc">C09K5/00</class-ref>; </text><CPC-specific-text><text>organic coolants <class-ref scheme="cpc">G21C5/123</class-ref></text></CPC-specific-text></reference><text>; </text><CPC-specific-text><text>Additions to the reactor coolants, e.g. against moderator corrosion </text><reference><text>purification and regeneration of the reactor coolants <class-ref scheme="cpc">G21C19/30</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G21C17/00" definition-exists="true" ipc-concordant="G21C17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Monitoring</text></title-part><title-part><text>Testing </text><reference><text>measuring in general <class-ref scheme="cpc">G01</class-ref></text></reference><text>; </text><CPC-specific-text><text>Maintaining</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C17/001" definition-exists="false" ipc-concordant="G21C17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanical simulators </text><reference><text>electrical or magnetic simulators <class-ref scheme="cpc">G06G7/54</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C17/002" definition-exists="false" ipc-concordant="G21C17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detection of leaks </text><reference><text>by testing the coolant or the moderator <class-ref scheme="cpc">G21C17/04</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C17/003" definition-exists="false" ipc-concordant="G21C17/003" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Remote inspection of vessels, e.g. pressure vessels</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/007" definition-exists="false" ipc-concordant="G21C17/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Inspection of the outer surfaces of vessels</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/01" definition-exists="false" ipc-concordant="G21C17/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/01</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Inspection of the inner surfaces of vessels</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/013" definition-exists="false" ipc-concordant="G21C17/013" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/013</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Inspection vehicles</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C17/017" definition-exists="false" ipc-concordant="G21C17/017" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/017</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Inspection or maintenance of pipe-lines or tubes in nuclear installations</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C17/02" definition-exists="false" ipc-concordant="G21C17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Devices or arrangements for monitoring coolant or moderator</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/021" definition-exists="false" ipc-concordant="G21C17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Solid moderators testing, e.g. graphite</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/022" definition-exists="false" ipc-concordant="G21C17/022" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for monitoring liquid coolants or moderators</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C17/0225" definition-exists="false" ipc-concordant="G21C17/022" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/0225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Chemical surface treatment, e.g. corrosion </text><reference><text>corrosion prevention in presence of water from scale removal or by modification of the properties of the liquid <class-ref scheme="cpc">C02F5/00</class-ref>; inhibiting corrosion by adding corrosion inhibitors <class-ref scheme="cpc">C23F11/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C17/025" definition-exists="false" ipc-concordant="G21C17/025" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for monitoring liquid metal coolants </text><CPC-specific-text><reference><text>molten metal sampling in general <class-ref scheme="cpc">G01N1/125</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C17/0255" definition-exists="false" ipc-concordant="G21C17/025" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/0255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Liquid metal leaks detection </text><reference><text>detecting leaks in pipe-line systems in general <class-ref scheme="cpc">F17D5/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/028" definition-exists="false" ipc-concordant="G21C17/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for monitoring gaseous coolants</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/032" definition-exists="false" ipc-concordant="G21C17/032" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/032</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reactor-coolant flow measuring or monitoring </text><CPC-specific-text><reference><text>measuring volume or mass flow in general <class-ref scheme="cpc">G01F</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/035" definition-exists="false" ipc-concordant="G21C17/035" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/035</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Moderator- or coolant-level detecting devices </text><CPC-specific-text><reference><text>indicating or measuring liquid level in general <class-ref scheme="cpc">G01F23/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/038" definition-exists="false" ipc-concordant="G21C17/038" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/038</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Boiling detection in moderator or coolant</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/04" definition-exists="false" ipc-concordant="G21C17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Detecting burst slugs</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C17/041" definition-exists="false" ipc-concordant="G21C17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by systems for checking the coolant channels, e.g. matrix systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C17/042" definition-exists="false" ipc-concordant="G21C17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Devices for selective sampling, e.g. valves, shutters, rotatable selector valves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C17/044" definition-exists="false" ipc-concordant="G21C17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detectors and metering devices for the detection of fission products</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C17/045" definition-exists="false" ipc-concordant="G21C17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Precipitation chambers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C17/047" definition-exists="false" ipc-concordant="G21C17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detection and metering circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C17/048" definition-exists="false" ipc-concordant="G21C17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by a special construction of fuel elements, e.g. by a confined "tracer"</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C17/06" definition-exists="false" ipc-concordant="G21C17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Devices or arrangements for monitoring or testing fuel or fuel elements outside the reactor core, e.g. for burn-up, for contamination </text><reference><text><class-ref scheme="cpc">G21C17/08</class-ref>, <class-ref scheme="cpc">G21C17/10</class-ref> take precedence; detecting leaking fuel elements during reactor operation <class-ref scheme="cpc">G21C17/04</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/063" definition-exists="false" ipc-concordant="G21C17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Burn-up control </text><reference><text><class-ref scheme="cpc">G21C17/066</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/066" definition-exists="false" ipc-concordant="G21C17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control of spherical elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/07" definition-exists="false" ipc-concordant="G21C17/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Leak testing</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C17/08" definition-exists="false" ipc-concordant="G21C17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structural combination of reactor core or moderator structure with viewing means, e.g. with television camera, periscope, window</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C17/10" definition-exists="false" ipc-concordant="G21C17/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/102" definition-exists="false" ipc-concordant="G21C17/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the sensitive element being part of a fuel element or a fuel assembly </text><reference><text>structural combination with a thermoelectric element for direct production of electrical energy <class-ref scheme="cpc">G21C3/40</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/104" definition-exists="false" ipc-concordant="G21C17/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/104</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Measuring reactivity</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/108" definition-exists="false" ipc-concordant="G21C17/108" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/108</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Measuring reactor flux</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/112" definition-exists="false" ipc-concordant="G21C17/112" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/112</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Measuring temperature</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/116" definition-exists="false" ipc-concordant="G21C17/116" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/116</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Passages or insulators, e.g. for electric cables</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C17/12" definition-exists="false" ipc-concordant="G21C17/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sensitive element forming part of control element</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C17/14" definition-exists="false" ipc-concordant="G21C17/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C17/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Period meters</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G21C19/00" definition-exists="false" ipc-concordant="G21C19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C19/02" definition-exists="false" ipc-concordant="G21C19/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of handling arrangements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C19/04" definition-exists="false" ipc-concordant="G21C19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G21C19/04</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Means for controlling flow of coolant over objects being handled</text></title-part><title-part><text>Means for controlling flow of coolant through channel being serviced </text><CPC-specific-text><text>, e.g. for preventing "blow-out"</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C19/06" definition-exists="false" ipc-concordant="G21C19/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magazines for holding fuel elements or control elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C19/065" definition-exists="false" ipc-concordant="G21C19/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rotatable magazines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C19/07" definition-exists="false" ipc-concordant="G21C19/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Storage racks</text></title-part><title-part><text>Storage pools</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C19/08" definition-exists="false" ipc-concordant="G21C19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for heating fuel elements before introduction into the core</text></title-part><title-part><text>Means for heating or cooling fuel elements after removal from the core</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C19/10" definition-exists="true" ipc-concordant="G21C19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements </text><reference><text>manipulators <class-ref scheme="cpc">B25J</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C19/105" definition-exists="false" ipc-concordant="G21C19/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with grasping or spreading coupling elements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C19/11" definition-exists="false" ipc-concordant="G21C19/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with revolving coupling elements, e.g. socket coupling</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C19/115" definition-exists="false" ipc-concordant="G21C19/115" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/115</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with latching devices and ball couplings</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C19/12" definition-exists="false" ipc-concordant="G21C19/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for exerting direct hydraulic or pneumatic force on fuel element or on control element</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C19/14" definition-exists="false" ipc-concordant="G21C19/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by their adaptation for use with horizontal channels in the reactor core</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C19/16" definition-exists="false" ipc-concordant="G21C19/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Articulated or telescopic chutes or tubes for connection to channels in the reactor core</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C19/18" definition-exists="false" ipc-concordant="G21C19/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus for bringing fuel elements to the reactor charge area, e.g. from a storage place</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C19/19" definition-exists="false" ipc-concordant="G21C19/19" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/19</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reactor parts specifically adapted to facilitate handling, e.g. to facilitate charging or discharging of fuel elements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C19/20" definition-exists="false" ipc-concordant="G21C19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for introducing objects into the pressure vessel</text></title-part><title-part><text>Arrangements for handling objects within the pressure vessel</text></title-part><title-part><text>Arrangements for removing objects from the pressure vessel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C19/202" definition-exists="false" ipc-concordant="G21C19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for handling ball-form, i.e. pebble fuel</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C19/205" definition-exists="false" ipc-concordant="G21C19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interchanging of fuel elements in the core, i.e. fuel shuffling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C19/207" definition-exists="false" ipc-concordant="G21C19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/207</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Assembling, maintenance or repair of reactor components </text><reference><text><class-ref scheme="cpc">G21C3/334</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C19/22" definition-exists="false" ipc-concordant="G21C19/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for obtaining access to the interior of a pressure vessel whilst the reactor is operating</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C19/24" definition-exists="false" ipc-concordant="G21C19/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using an auxiliary vessel which is temporarily sealed to the pressure vessel</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C19/26" definition-exists="false" ipc-concordant="G21C19/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for removing jammed or damaged fuel elements or control elements</text></title-part><title-part><text>Arrangements for moving broken parts thereof</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C19/28" definition-exists="false" ipc-concordant="G21C19/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for introducing fluent material into the reactor core</text></title-part><title-part><text>Arrangements for removing fluent material from the reactor core </text><reference><text>pumping coolant <class-ref scheme="cpc">G21D</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C19/30" definition-exists="false" ipc-concordant="G21C19/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with continuous purification of circulating fluent material, e.g. by extraction of fission products </text><CPC-specific-text><text>deterioration or corrosion products, impurities, e.g. by cold traps </text><reference><text>purification of circulating fluid fuels <class-ref scheme="cpc">G21C19/50</class-ref>; separation in general <class-ref scheme="cpc">B01D</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C19/303" definition-exists="false" ipc-concordant="G21C19/303" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/303</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for gases </text><reference><text>decontamination of gases <class-ref scheme="cpc">G21F9/02</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C19/307" definition-exists="false" ipc-concordant="G21C19/307" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/307</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for liquids </text><reference><text>decontamination of liquids <class-ref scheme="cpc">G21F9/04</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C19/31" definition-exists="false" ipc-concordant="G21C19/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/31</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for molten metals</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G21C19/313" definition-exists="false" ipc-concordant="G21C19/313" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/313</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using cold traps</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C19/317" definition-exists="false" ipc-concordant="G21C19/317" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/317</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recombination devices for radiolytic dissociation products</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C19/32" definition-exists="false" ipc-concordant="G21C19/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus for removing radioactive objects or materials from the reactor discharge area, e.g. to a storage place</text></title-part><title-part><text>Apparatus for handling radioactive objects or materials within a storage place or removing them therefrom </text><reference><text>disposal of waste material <class-ref scheme="cpc">G21F9/00</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C19/34" definition-exists="false" ipc-concordant="G21C19/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G21C19/34</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Apparatus or processes for dismantling nuclear fuel, e.g. before reprocessing </text><CPC-specific-text><text>; Apparatus or processes for dismantling strings of spent fuel elements</text></CPC-specific-text><reference><text>shielded cells <class-ref scheme="cpc">G21F7/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C19/36" definition-exists="false" ipc-concordant="G21C19/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mechanical means only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C19/365" definition-exists="false" ipc-concordant="G21C19/365" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/365</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Removing cannings or casings from fuel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G21C19/37" definition-exists="false" ipc-concordant="G21C19/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/37</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by separating into pieces both the canning or the casing and the fuel element, e.g. by cutting or shearing</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C19/375" definition-exists="false" ipc-concordant="G21C19/375" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/375</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Compacting devices, e.g. for fuel assemblies</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C19/38" definition-exists="false" ipc-concordant="G21C19/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Chemical means only</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C19/40" definition-exists="false" ipc-concordant="G21C19/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for preventing occurrence of critical conditions, e.g. during storage</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C19/42" definition-exists="true" ipc-concordant="G21C19/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reprocessing of irradiated fuel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C19/44" definition-exists="false" ipc-concordant="G21C19/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of irradiated solid fuel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C19/46" definition-exists="false" ipc-concordant="G21C19/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G21C19/46</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Aqueous processes </text><CPC-specific-text><text>, e.g. by using organic extraction means, including the regeneration of these means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G21C19/48" definition-exists="false" ipc-concordant="G21C19/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C19/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-aqueous processes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C19/50" definition-exists="false" ipc-concordant="G21C19/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G21C19/50</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>of irradiated fluid fuel </text><CPC-specific-text><text>, e.g. regeneration of fuels while the reactor is in operation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G21C21/00" definition-exists="true" ipc-concordant="G21C21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C21/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus or processes specially adapted to the manufacture of reactors or parts thereof </text><reference><text>in general section <class-ref scheme="cpc">B</class-ref>, e.g. <class-ref scheme="cpc">B23</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C21/02" definition-exists="false" ipc-concordant="G21C21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C21/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manufacture of fuel elements or breeder elements contained in non-active casings</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C21/04" definition-exists="false" ipc-concordant="G21C21/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C21/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by vibrational compaction or tamping </text><CPC-specific-text><text>of fuel in the jacket</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C21/06" definition-exists="false" ipc-concordant="G21C21/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C21/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by </text><CPC-specific-text><text>rotatable</text></CPC-specific-text><text> swaging </text><CPC-specific-text><text>of the jacket around the fuel</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C21/08" definition-exists="false" ipc-concordant="G21C21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C21/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by a slip-fit cladding process </text><CPC-specific-text><text>by crimping the jacket around the fuel</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C21/10" definition-exists="false" ipc-concordant="G21C21/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C21/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by extrusion, drawing, or stretching </text><CPC-specific-text><text>by rolling, e.g. "picture frame" technique</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C21/12" definition-exists="false" ipc-concordant="G21C21/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C21/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by hydrostatic or thermo-pneumatic canning </text><CPC-specific-text><text>in general by pressing without lengthening, e.g. explosive coating</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C21/14" definition-exists="false" ipc-concordant="G21C21/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C21/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by plating </text><CPC-specific-text><text>the fuel</text></CPC-specific-text><text> in a fluid</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G21C21/16" definition-exists="false" ipc-concordant="G21C21/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C21/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by casting or dipping techniques</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G21C21/18" definition-exists="false" ipc-concordant="G21C21/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-02-04" status="published"><classification-symbol>G21C21/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manufacture of control elements covered by group <class-ref scheme="cpc">G21C7/00</class-ref></text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G21C23/00" definition-exists="true" ipc-concordant="G21C23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G21C23/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Adaptations of reactors to facilitate experimentation or irradiation</text></title-part></class-title></classification-item></classification-item></classification-item></class-scheme> |