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← ScienceWhich consequence occurs when isotopic enrichment exceeds target specifications in uranium fuel?
A)Elevated exothermic neutron production
B)Diminished criticality safety margins✓
C)Increased moderator volume requirements
D)Reduced breeding ratio performance
💡 Explanation
Diminished criticality safety margins occur because excessive enrichment elevates the neutron multiplication factor leading to supercriticality via neutron multiplication. The mechanism, neutron moderation efficiency, shifts; therefore criticality increases beyond design rather than moderator changes.
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