A reactimeter is a diagnostic device used in nuclear power plants (and other nuclear applications) for measuring the
reactivity of the
nuclear chain reaction
In nuclear physics, a nuclear chain reaction occurs when one single nuclear reaction causes an average of one or more subsequent nuclear reactions, thus leading to the possibility of a self-propagating series of these reactions. The specific nu ...
(in
inhours) of fissile materials as they approach
criticality.
Measuring instruments
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