scram(redirected from scramb)
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an emergency shutdown of a nuclear reactor
A sudden shutting down of a nuclear reactor, usually by dropping safety rods, when a predetermined neutron flux or other dangerous condition occurs.
To close down a reactor by bringing about a scram.
In air-intercept usage, a code meaning, “I am about to open fire. Friendly units keep clear or get clear of the indicated contact, bogey, or area.” The direction of withdrawal may be indicated. The type of fire may be indicated (e.g., scram proximity: “I am about to open fire with proximity-fused ammunition”; scram mushroom: “I am about to fire a special weapon.”)