1. CPC Sections
  2. CPC Section G
  3. CPC Class G21
  4. CPC Subclass G21D
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CPC
COOPERATIVE PATENT CLASSIFICATION
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G21D
NUCLEAR POWER PLANT [2020-05]
WARNING

  • 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.
G21D 1/00
Details of nuclear power plant (control G21D 3/00) [2013-01]
G21D 1/003
.
{Nuclear facilities decommissioning arrangements (decontamination arrangements, treating radioactively contaminated material G21F 9/00)} [2013-01]
G21D 1/006
.
{primary side of steam generators (secondary side of steam generators F22B 1/00, F22B 35/00 or F22B 37/00)} [2013-01]
G21D 1/02
.
Arrangements of auxiliary equipment [2013-01]
G21D 1/04
.
Pumping arrangements (within the reactor pressure vessel G21C 15/24; electrodynamic pumps H02K 44/02) [2013-01]
G21D 3/00
Control of nuclear power plant (control of nuclear reaction in general G21C 7/00) [2013-01]
G21D 3/001
.
{Computer implemented control} [2013-01]
G21D 3/002
. .
{Core design; core simulations; core optimisation} [2019-01]
G21D 3/004
. .
{Fuel shuffle simulation; fuel shuffle optimisation} [2019-01]
G21D 3/005
. .
{Thermo-hydraulic simulations} [2019-01]
G21D 3/007
.
{Expert systems} [2019-01]
G21D 3/008
.
{Man-machine interface, e.g. control room layout} [2013-01]
G21D 3/02
.
Manual control [2013-01]
G21D 3/04
.
Safety arrangements (emergency protection of reactor G21C 9/00) [2013-01]
G21D 3/06
. .
responsive to faults within the plant (in the reactor G21C 9/00) [2013-01]
G21D 3/08
.
Regulation of any parameters in the plant [2013-01]
G21D 3/10
. .
by a combination of a variable derived from neutron flux with other controlling variables, e.g. derived from temperature, cooling flow, pressure [2013-01]
G21D 3/12
. .
by adjustment of the reactor in response only to changes in engine demand [2013-01]
G21D 3/14
. . .
Varying flow of coolant [2013-01]
G21D 3/16
. . .
Varying reactivity [2013-01]
G21D 3/18
. .
by adjustment of plant external to the reactor only in response to change in reactivity [2013-01]
G21D 5/00
Arrangements of reactor and engine in which reactor-produced heat is converted into mechanical energy [2013-01]
G21D 5/02
.
Reactor and engine structurally combined, e.g. portable [2013-01]
G21D 5/04
.
Reactor and engine not structurally combined [2013-01]
G21D 5/06
. .
with engine working medium circulating through reactor core [2013-01]
G21D 5/08
. .
with engine working medium heated in a heat exchanger by the reactor coolant [2013-01]
G21D 5/10
. . .
Liquid working medium partially heated by reactor and vaporised by heat source external to the core, e.g. with oil heating [2013-01]
G21D 5/12
. . .
Liquid working medium vaporised by reactor coolant [2013-01]
G21D 5/14
. . . .
and also superheated by reactor coolant [2013-01]
G21D 5/16
. . . .
superheated by separate heat source [2013-01]
G21D 7/00
Arrangements for direct production of electric energy from fusion or fission reactions (obtaining electric energy from radioactive sources G21H 1/00) [2013-01]
G21D 7/02
.
using magneto-hydrodynamic generators {(MHD-generators with thermodynamic cycles F02C 7/00; magneto-hydrodynamic generators H02K 44/08)} [2013-01]
G21D 7/04
.
using thermoelectric elements {or thermoionic converters}(structural combination of fuel element with thermoelectric element {or with thermoionic converters} G21C 3/40 {, G21H 1/10}; thermoelectric elements per se H10N 10/00, H10N 15/00) [2023-02]
G21D 9/00
Arrangements to provide heat for purposes other than conversion into power, e.g. for heating buildings [2013-01]