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← ScienceWhich consequence results when uranium enrichment exceeds thresholds?
A)Neutron moderation decrease occurs rapidly
B)Criticality accident probability escalates severely✓
C)Chain reaction efficiency collapses steadily
D)Spontaneous emission intensity attenuates quickly
💡 Explanation
A criticality accident probability escalates because increased U-235 concentration amplifies the neutron flux via increased probabilities of nuclear fission. Therefore, exceeding enrichment targets rapidly increases accident risks, rather than moderation changes, dampened reactions, or emission decreases relating to background radiation.
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