definition of scram (noun)
a fast shutdown of a nuclear reactor during an emergency, by quickly inserting control rods into the core. Supposedly derived during the infancy of nuclear reactors when Norman Hilbury was stationed with an axe to cut a rope holding the safety control rod during the experiment at the Chicago Pile on 2nd December 1942, when reactor critcality was first demonstrated.
The reactor scram automatically occurred due to high neutron flux.
Submitted by: LDUNLAP from United States on 24/05/2010 14:17:00