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← ScienceWhich risk increases when enriched uranium fuel rods reach end-of-life?
A)Criticality excursions within the spent fuel pool✓
B)Decreased neutron moderation effectiveness
C)Accelerated alpha decay heat generation
D)Increased structural compressive forces
💡 Explanation
Criticality increases because the buildup of neutron-absorbing fission **products** lowers neutron flux control within the fuel. Therefore accidental chain reactions are possible even with depleted fissile isotopes, rather than lowered heat preventing the reaction.
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