US PATENT SUBCLASS 976 / DIG 146-- .~ Means for effecting very rapid reduction of the reactivity factor under fault conditions (e.g., reactor fuse, control elements having arrangements activated in an emergency) [G21C-9/02] *** (control elements, per se, DIG. 113+)

US PATENT SUBCLASS 976 / DIG 146
.~ Means for effecting very rapid reduction of the reactivity factor under fault conditions (e.g., reactor fuse, control elements having arrangements activated in an emergency) [G21C-9/02] *** (control elements, per se, DIG. 113+)

976 /	HD	NUCLEAR TECHNOLOGY

DIG 139	DD	EMERGENCY PROTECTION ARRANGEMENTS STRUCTALLY ASSOCIATED WITH THE REACTOR (e.g., safety valves provided with pressure equalization devices) [G21C-9/00] *** (emergency cooling arrangements DIG. 196) {6}
DIG 146		.~ Means for effecting very rapid reduction of the reactivity factor under fault conditions (e.g., reactor fuse, control elements having arrangements activated in an emergency) [G21C-9/02] *** (control elements, per se, DIG. 113+) {4}
DIG 147	DD	.~.~> By fast movement of a solid (e.g, pebbles) [G21C-9/02B]
DIG 148	DD	.~.~> By an absorbant fluid [G21C-9/02D]
DIG 149	DD	.~.~> Reactor fuses [G21C-9/02F]
DIG 150	DD	.~.~> Rupture diaphragms [G21C-9/02H]