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prompt critical. In DICTIOUS you will not only get to know all the dictionary meanings for the word
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English
Adjective
prompt critical (not comparable)
- (nuclear physics) Of the point where the prompt neutrons produced by a nuclear fission chain reaction are just sufficient to sustain the chain reaction on their own, past which changes in reaction power occur on a timeframe of milliseconds, too rapidly for a human operator to control.
2000, Thomas P. McLaughlin with Shean P. Monahan, Norman L. Pruvost, Vladimir V. Frolov, Boris G. Ryazanov, and Victor I. Sviridov, “I. A. 17. Mayak Production Association, 10 December 1968”, in A Review of Criticality Accidents: 2000 Revision, Los Alamos National Laboratory, archived from the original on 24 February 2021, page 42:The number of fissions in the two prompt critical excursions was estimated from (1) the doses received by the operator and shift supervisor and (2) the measured exposure rate from fission product gamma–rays (1.5 mR/s at 3 m from the vessel, 1 hour after the last excursion).
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