CPC Main Group G21B 1/00 Thermonuclear fusion reactors 5 direct subcodes Child Classifications Navigate with arrow keys, Enter to open G21B 1/01 Hybrid fission-fusion nuclear reactors G21B 1/03 with inertial plasma confinement G21B 1/05 with magnetic or electric plasma confinement G21B 1/11 Details G21B 1/25 Maintenance, e.g. repair or remote inspection