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Which consequence results when criticality is exceeded in reactor?

A)Uncontrolled chain reaction accelerates exponentially
B)Moderator poisons transmute into fertile material
C)Coolant boiling slows neutron thermalization
D)Delayed neutrons stabilize the reaction rate

💡 Explanation

When criticality exceeds prompt-critical, fission increases exponentially through neutron multiplication, causing increased heat because a prompt increase in neutron population from fission chain reaction occurs, leading to rapid power excursions, rather than the intended controlled rate.

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