G21D NUCLEAR POWER PLANT
Introduced: September 1968
Classification Context
- Section:
- PHYSICS
- Class:
- NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- Subclass:
- NUCLEAR POWER PLANT
Description
G21D covers the overall design, construction, and operation of nuclear power plants as integrated systems for generating electrical power through nuclear fission. This includes plant layout, control systems, safety mechanisms, heat transfer arrangements, and the interconnection of reactor vessels with steam generators, turbines, and auxiliary systems. The classification encompasses both pressurized water reactors (PWR) and boiling water reactors (BWR) configurations, as well as related plant engineering aspects. Excluded are detailed aspects of reactor cores themselves (G21C), radioactive waste handling (G21F), and non-power nuclear installations.
Additional Content
Structural combination of fuel element with thermoelectric element Control of nuclear reaction Emergency protection arrangements structurally associated with a reactor; for rapid reduction of reactivity under fault conditions; for suppressing fires , , Pumping arrangements for the coolant by means within the reactor pressure vessel Obtaining electrical energy from radioactive sources
Related Keywords
5 direct subcodes
Child Classifications
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- G21D 1/00 Details of nuclear power plant
- G21D 3/00 Control of nuclear power plant
- G21D 5/00 Arrangements of reactor and engine in which reactor-produced heat is converted into mechanical energy
- G21D 7/00 Arrangements for direct production of electric energy from fusion or fission reactions
- G21D 9/00 Arrangements to provide heat for purposes other than conversion into power, e.g. for heating buildings
Top Applicants
Top 10 applicants by patent filingsfor class G21, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINA GENERAL NUCLEAR POWER CORPORATION 2,364
- CGN POWER COMPANY 1,899
- CHINA NUCLEAR POWER ENGINEERING COMPANY 1,870
- NUCLEAR POWER INSTITUTE OF CHINA 1,517
- KOREA ATOMIC ENERGY RESEARCH INSTITUTE KR 1,367
- WESTINGHOUSE ELECTRIC CORPORATION US 1,295
- KOREA HYDRO & NUCLEAR POWER COMPANY KR 1,196
- CHINESE ACADEMY OF SCIENCES 1,044
- CHINA INSTITUTE OF ATOMIC ENERGY 1,011
- HITACHI-GE NUCLEAR ENERGY 955