NUCLEAR PHYSICS; NUCLEAR ENGINEERING

Classification Context

Section:: PHYSICS
Class:: NUCLEAR PHYSICS; NUCLEAR ENGINEERING

Description

Class G21 encompasses nuclear physics research and practical nuclear engineering applications. It covers nuclear reactions, fission and fusion processes, reactor design and operation, radiation protection, nuclear fuel handling, and waste management technologies. This classification includes both fundamental scientific investigations into nuclear phenomena and industrial implementations such as power generation, propulsion systems, and medical/industrial radiation applications. Adjacent classes address related topics like general radiation physics (G21H) or specific particle physics experiments, which may be classified elsewhere within the G section.

Related Keywords

atomic energy

8 direct subcodes

Child Classifications

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G21B FUSION REACTORS
G21C NUCLEAR REACTORS
G21D NUCLEAR POWER PLANT
G21F PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
G21G CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES
G21H OBTAINING ENERGY FROM RADIOACTIVE SOURCES; APPLICATIONS OF RADIATION FROM RADIOACTIVE SOURCES, NOT OTHERWISE PROVIDED FOR; UTILISING COSMIC RADIATION
G21J NUCLEAR EXPLOSIVES; APPLICATIONS THEREOF
G21K HANDLING OF PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES

Top Applicants

Top 10 applicants by patent filings, 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