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← ScienceWhich risk arises when exceeding prompt criticality in fissile materials?
A)Uncontrolled chain reaction escalation✓
B)Moderator poisoning of the core
C)Fuel enrichment isotopic shift
D)Structural material neutron embrittlement
💡 Explanation
An uncontrolled chain reaction occurs because prompt criticality leads to a rapid increase in fission events, which causes exponential power increases rather than a stable fission rate. Therefore runaway fission occurs, rather than progressive contamination since it happens much faster.
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