| G | Sektion G — Physik | PHYSICS | |
 | G21 | Kernphysik; Kerntechnik | NUCLEAR PHYSICS; NUCLEAR ENGINEERING |
 | G21C | Kernreaktoren (Fusionsreaktoren, Hybridreaktoren mit Kernspaltung und -fusion G21B; Kernsprengstoffe G21J) | NUCLEAR REACTORS (fusion reactors, hybrid fission-fusion reactors G21B; nuclear explosives G21J) |
 | G21C 1/00 | Reaktortypen [1, 2006.01] | Reactor types [1, 2006.01, 2018.01] |