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Scram
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This article is about nuclear reactors. For other meanings, see
Scram (disambiguation).
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scram in
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A scram or SCRAM is an emergency shutdown of a In many cases, a SCRAM is part of the routine shutdown procedure, as well.
Contents
Mechanisms
In any reactor, a SCRAM is achieved by a large insertion of negative
reactivity. In
light water reactors, this is achieved by inserting neutron-absorbing
control rods into the core, although the mechanism by which rods are inserted depends on the type of reactor. In PWRs, the control rods are held above a reactor's core by electric motors against both their own weight and a powerful spring. Any cutting of the electric...
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