OBTAINING ENERGY FROM RADIOACTIVE SOURCES; APPLICATIONS OF RADIATION FROM RADIOACTIVE SOURCES, NOT OTHERWISE PROVIDED FOR; UTILISING COSMIC RADIATION

Introduced: September 1968

Classification Context

Section:: PHYSICS
Class:: NUCLEAR PHYSICS; NUCLEAR ENGINEERING
Subclass:: OBTAINING ENERGY FROM RADIOACTIVE SOURCES; APPLICATIONS OF RADIATION FROM RADIOACTIVE SOURCES, NOT OTHERWISE PROVIDED FOR; UTILISING COSMIC RADIATION

Description

G21H covers energy extraction from radioactive decay and practical applications of radiation that do not fall within other nuclear engineering classifications. This includes radioisotope power systems (such as radioisotope thermoelectric generators and betavoltaic devices), radiation-based propulsion concepts, and direct utilization of cosmic radiation energy. The subclass also encompasses miscellaneous applications of radioactive sources not specifically addressed by companion classes G21B through G21G, serving as a catch-all for novel or unconventional energy conversion and radiation utilization technologies in the nuclear domain.

Scope Notes

Limiting references: Measurement of nuclear or X-radiation Fusion reactors Nuclear reactors Lamps in which a gas filling is excited to luminescence by external corpuscular radiation or by radioactive material structurally associated with the lamp ,

4 direct subcodes

Child Classifications

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G21H 1/00 Arrangements for obtaining electrical energy from radioactive sources, e.g. from radioactive isotopes
G21H 3/00 Arrangements for direct conversion of radiation energy from radioactive sources into forms of energy other than electric energy, e.g. light
G21H 5/00 Applications of radiation from radioactive sources or arrangements therefor, not otherwise provided for
G21H 7/00 Use of effects of cosmic radiation