G21D1/00	7	Details of nuclear power plant (control G21D3/00)	G21D1/00	G21D1/00		736
G21D1/003	8	{Nuclear facilities decommissioning arrangements (decontamination arrangements, treating radioactively contaminated material G21F9/00)}	G21D1/00	G21D1/00		468
G21D1/006	8	{primary side of steam generators (secondary side of steam generators F22B1/00, F22B35/00 or F22B37/00)}	G21D1/00	G21D1/00		417
G21D1/02	8	Arrangements of auxiliary equipment	G21D1/02	G21D1/02		1245
G21D1/04	8	Pumping arrangements (within the reactor pressure vessel G21C15/24; electrodynamic pumps H02K44/02)	G21D1/04	G21D1/04		271
G21D3/00	7	Control of nuclear power plant (control of nuclear reaction in general G21C7/00)	G21D3/00	G21D3/00		383
G21D3/001	8	{Computer implemented control}	G21D3/00	G21D3/00		932
G21D3/002	9	{Core design; core simulations; core optimisation}	G21D3/00	G21D3/00		181
G21D3/004	9	{Fuel shuffle simulation; fuel shuffle optimisation}	G21D3/00	G21D3/00		25
G21D3/005	9	{Thermo-hydraulic simulations}	G21D3/00	G21D3/00		76
G21D3/007	8	{Expert systems}	G21D3/00	G21D3/00		37
G21D3/008	8	{Man-machine interface, e.g. control room layout}	G21D3/00	G21D3/00		268
G21D3/02	8	Manual control	G21D3/02	G21D3/02		21
G21D3/04	8	Safety arrangements (emergency protection of reactor G21C9/00)	G21D3/04	G21D3/04		1171
G21D3/06	9	responsive to faults within the plant (in the reactor G21C9/00)	G21D3/06	G21D3/06		788
G21D3/08	8	Regulation of any parameters in the plant	G21D3/08	G21D3/08		411
G21D3/10	9	by a combination of a variable derived from neutron flux with other controlling variables, e.g. derived from temperature, cooling flow, pressure	G21D3/10	G21D3/10		130
G21D3/12	9	by adjustment of the reactor in response only to changes in engine demand	G21D3/12	G21D3/12		115
G21D3/14	10	Varying flow of coolant	G21D3/14	G21D3/14		109
G21D3/16	10	Varying reactivity	G21D3/16	G21D3/16		39
G21D3/18	9	by adjustment of plant external to the reactor only in response to change in reactivity	G21D3/18	G21D3/18		20
G21D5/00	7	Arrangements of reactor and engine in which reactor-produced heat is converted into mechanical energy	G21D5/00	G21D5/00		93
G21D5/02	8	Reactor and engine structurally combined, e.g. portable	G21D5/02	G21D5/02		362
G21D5/04	8	Reactor and engine not structurally combined	G21D5/04	G21D5/04		130
G21D5/06	9	with engine working medium circulating through reactor core	G21D5/06	G21D5/06		281
G21D5/08	9	with engine working medium heated in a heat exchanger by the reactor coolant	G21D5/08	G21D5/08		315
G21D5/10	10	Liquid working medium partially heated by reactor and vaporised by heat source external to the core, e.g. with oil heating	G21D5/10	G21D5/10		13
G21D5/12	10	Liquid working medium vaporised by reactor coolant	G21D5/12	G21D5/12		68
G21D5/14	11	and also superheated by reactor coolant	G21D5/14	G21D5/14		54
G21D5/16	11	superheated by separate heat source	G21D5/16	G21D5/16		48
G21D7/00	7	Arrangements for direct production of electric energy from fusion or fission reactions (obtaining electric energy from radioactive sources G21H1/00)	G21D7/00	G21D7/00		98
G21D7/02	8	using magneto-hydrodynamic generators {(MHD-generators with thermodynamic cycles F02C7/00; magneto-hydrodynamic generators H02K44/08)}	G21D7/02	G21D7/02		58
G21D7/04	8	using thermoelectric elements {or thermoionic converters}(structural combination of fuel element with thermoelectric element {or with thermoionic converters}G21C3/40{, G21H1/10}; thermoelectric elements per seH10N10/00, H10N15/00)	G21D7/04	G21D7/04		236
G21D9/00	7	Arrangements to provide heat for purposes other than conversion into power, e.g. for heating buildings	G21D9/00	G21D9/00		408
