CPC Definition - Subclass G21D

Last Updated Version: 2019.01
NUCLEAR POWER PLANT
Definition statement

This place covers:

Aspects of power plants which include, as a power generator, a nuclear fission reactor. Also power plants which convert the heat produced by the fission reaction into forms of energy other than electricity (e.g. mechanical energy).

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Electric or magnetic analogue computers, e.g. simulators, for nuclear physics

G06G 7/54

Nuclear fusion reactors

G21B

Aspects related to nuclear fission reactors per se

G21C

Structural combination of fuel element

G21C 3/40

Control of nuclear reaction

G21C 7/00

Emergency protection arrangements structurally associated with a reactor; for rapid reduction of reactivity under fault conditions; for suppressing fires

G21C 9/00, G21C 9/02, G21C 9/04

Pumping arrangements for the coolant by means within the reactor pressure vessel

G21C 15/24

Obtaining electrical energy from radioactive sources

G21H 1/00

Nuclear explosives and their applications

G21J

Thermoelectric elements per se

H01L 35/00, H01L 37/00

Electrodynamic pumps

H02K 44/02

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Engine

plant, such as turbine

Engine demand

load

Details of nuclear power plant (control G21D 3/00)
Definition statement

This place covers:

Details of the nuclear power plant, other than details of the nuclear reactor per se.

References
Limiting references

This place does not cover:

Control of nuclear power plant

G21D 3/00

Informative references

Attention is drawn to the following places, which may be of interest for search:

Pumps for liquids per se

F04

Dismantling spent nuclear fuel

G21C 19/34

{primary side of steam generators (secondary side of steam generators F22B 1/00, F22B 35/00 or F22B 37/00)}
Definition statement

This place covers:

Steam generator replacements.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Secondary side of steam generators

F22B 1/00, F22B 35/00, F22B 37/00

Control of nuclear power plant (control of nuclear reaction in general G21C 7/00)
Definition statement

This place covers:

Aspects of the control of nuclear power plants, other than the control of the nuclear fission reaction per se.

References
Limiting references

This place does not cover:

Control of nuclear reaction

G21C 7/00

Emergency protection structurally associated with the reactor

G21C 9/00

Emergency cooling arrangements (primary circuit)

G21C 15/18

Informative references

Attention is drawn to the following places, which may be of interest for search:

Electrical digital data processing

G06F

Analog computers

G06G

{Computer implemented control}
Definition statement

This place covers:

Computer implemented systems and methods related to nuclear reactor applications, such as design, licensing procedures, fuel shuffling, core loading patterns, data processing, etc.

Arrangements of reactor and engine in which reactor-produced heat is converted into mechanical energy
Definition statement

This place covers:

Nuclear propulsion, e.g. for applications in ships, submarines and space crafts.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Arrangements or adaptations of propulsion systems of cosmonautic vehicles

B64G 1/408

Plants characterised by the use of steam or heat accumulators using nuclear heat;

F01K 3/181

Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases using nuclear energy

F02C 1/05

Arrangements for direct production of electric energy from fusion or fission reactions (obtaining electric energy from radioactive sources G21H 1/00)
References
Limiting references

This place does not cover:

Obtaining energy from radioactive sources

G21H 1/00

Arrangements to provide heat for purposes other than conversion into power, e.g. for heating buildings
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Methods and apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells by means of nuclear energy

E21B 43/2403