Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse; (control elements per se G21C7/00)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse

CPC: Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse; (control elements per se G21C7/00)

Full Title

Full titles differ between systems:

IPC:

Emergency protection arrangements structurally associated with the reactor > Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse

CPC:

Emergency protection arrangements structurally associated with the reactor (emergency cooling arrangements G21C15/18) > Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse; (control elements per se G21C7/00)

Of 4 combined children, 2 exist in both systems.

2 codes are CPC-only extensions.

IPC defines codes here since 1990.

Child Classifications

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G21C 9/022 CPC only CPC only
G21C 9/024 CPC only CPC only
G21C 9/027 by fast movement of a solid, e.g. pebbles since 1990 IPC+CPC Available in IPC and CPC
G21C 9/033 by an absorbent fluid since 1990 IPC+CPC Available in IPC and CPC