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← ScienceWhich consequence results when prompt criticality in a reactor core?
A)Uncontrolled power excursion initiated✓
B)Delayed neutron emission increases rates
C)Moderator temperature coefficient reverses sign
D)Equilibrium xenon poisoning stabilizes faster
💡 Explanation
Prompt criticality leads to rapid rise in fission rate because chain reaction is sustained only by prompt neutrons; therefore an uncontrolled power excursion is initiated immediately, rather than delayed effects caused by neutron moderation or fission product poisons.
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