|  | G |
SECTION G — PHYSICS

NUCLEONICS

|  | G21 |
NUCLEAR PHYSICS; NUCLEAR ENGINEERING

|  | G21B |
FUSION REACTORS (uncontrolled reactors Fulltext... Hierarchy... Expanded...G21J)

|  | G21C |
NUCLEAR REACTORS (analogue computers therefor Fulltext... Hierarchy... Expanded...G06G 7/54; fusion reactors Fulltext... Hierarchy... Expanded...G21B; nuclear explosives Fulltext... Hierarchy... Expanded...G21J)

|  | G21D |
NUCLEAR POWER PLANT (electric or magnetic analogue computers, e.g. simulators, for nuclear physics Fulltext... Hierarchy... Expanded...G06G 7/54)

|  | G21F |
PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION, OR PARTICLE BOM- BARDMENT; DECONTAMINATION ARRANGEMENTS; TREATING RADIOACTIVELY-CONTAMINATED MATERIAL (radiation protection by pharmaceutical means Fulltext... Hierarchy... Expanded...A61K 7/40; in cosmonautic vehicles Fulltext... Hierarchy... Expanded...B64G; combined with a reactor Fulltext... Hierarchy... Expanded...G21C 11/00; combined with X-ray tubes Fulltext... Hierarchy... Expanded...H01J 35/16; combined with X-ray apparatus Fulltext... Hierarchy... Expanded...H05G 1/02)

|  | G21G |
CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES (applications of radiation in general Fulltext... Hierarchy... Expanded...G21H 5/00; handling particles, e.g. neutrons, or electromagnetic radiation not otherwise provided for Fulltext... Hierarchy... Expanded...G21K) [2]

|  | G21H |
OBTAINING ENERGY FROM RADIOACTIVE SOURCES; APPLICATIONS OF RADIATION FROM RADIOACTIVE SOURCES; UTILISING COSMIC RADIATION (measurement of nuclear or X-radiation Fulltext... Hierarchy... Expanded...G01T; fusion reactors Fulltext... Hierarchy... Expanded...G21B; nuclear reactors Fulltext... Hierarchy... Expanded...G21C; semiconductor devices sensitive to electromagnetic or corpuscular radiation Fulltext... Hierarchy... Expanded...H01L 31/00)

|  | G21J |
NUCLEAR EXPLOSIVES; APPLICATIONS THEREOF (electric or magnetic analogue computers, e.g. simulators, for nuclear physics Fulltext... Hierarchy... Expanded...G06G 7/54)

|  | G21J |
Note(s) This sub-class deals with uncontrolled fission or fusion reactions.

|  | G21K |
TECHNIQUES FOR HANDLING PARTICLES OR ELECTROMAGNETIC RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA- OR X-RAY MICROSCOPES (X-ray technique Fulltext... Hierarchy... Expanded...H05G; plasma technique Fulltext... Hierarchy... Expanded...H05H) [2]