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Which outcome occurs when fissile material exceeds criticality?

A)Uncontrolled exponential chain fission reaction
B)Moderator poisoning halts neutron absorption
C)Isotopic enrichment slows decay rate
D)Beta decay releases delayed neutrons

💡 Explanation

An uncontrolled exponential chain fission reaction results from criticality because the neutron multiplication factor reaches or exceeds one, therefore rapid fission occurs rather than a controlled, slower exponential or system shutdown by other means.

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