G21DNUCLEAR POWER PLANTIn this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. G21D1/00 G21D1/00Details of nuclear power plant control G21D3/00 G21D1/003Nuclear facilities decommissioning arrangements decontamination arrangements, treating radioactively contaminated material G21F9/00 G21D1/006primary side of steam generators secondary side of steam generators F22B1/00, F22B35/00 or F22B37/00 G21D1/02Arrangements of auxiliary equipment G21D1/04Pumping arrangements within the reactor pressure vessel G21C15/24; electrodynamic pumps H02K44/02 G21D3/00Control of nuclear power plant control of nuclear reaction in general G21C7/00 G21D3/001Computer implemented control G21D3/002Core design; core simulations; core optimisation G21D3/004Fuel shuffle simulation; fuel shuffle optimisation G21D3/005Thermo-hydraulic simulations G21D3/007Expert systems G21D3/008Man-machine interface, e.g. control room layout G21D3/02Manual control G21D3/04Safety arrangements emergency protection of reactor G21C9/00 G21D3/06responsive to faults within the plant in the reactor G21C9/00 G21D3/08Regulation of any parameters in the plant G21D3/10by a combination of a variable derived from neutron flux with other controlling variables, e.g. derived from temperature, cooling flow, pressure G21D3/12by adjustment of the reactor in response only to changes in engine demand G21D3/14Varying flow of coolant G21D3/16Varying reactivity G21D3/18by adjustment of plant external to the reactor only in response to change in reactivity G21D5/00Arrangements of reactor and engine in which reactor-produced heat is converted into mechanical energy G21D5/02Reactor and engine structurally combined, e.g. portable G21D5/04Reactor and engine not structurally combined G21D5/06with engine working medium circulating through reactor core G21D5/08with engine working medium heated in a heat exchanger by the reactor coolant G21D5/10Liquid working medium partially heated by reactor and vaporised by heat source external to the core, e.g. with oil heating G21D5/12Liquid working medium vaporised by reactor coolant G21D5/14and also superheated by reactor coolant G21D5/16superheated by separate heat source G21D7/00Arrangements for direct production of electric energy from fusion or fission reactions obtaining electric energy from radioactive sources G21H1/00 G21D7/02using magneto-hydrodynamic generators MHD-generators with thermodynamic cycles F02C7/00; magneto-hydrodynamic generators H02K44/08 G21D7/04using thermoelectric elements or thermoionic convertersstructural combination of fuel element with thermoelectric element or with thermoionic converters G21C3/40 , G21H1/10; thermoelectric elements per se H10N10/00, H10N15/00 G21D9/00Arrangements to provide heat for purposes other than conversion into power, e.g. for heating buildings