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Which risk increases when enriched uranium isotopes accumulate in reprocessing equipment?

A)Uncontrolled nuclear chain reaction
B)Catalyst poisoning within reactors
C)Excess formation of transuranics
D)Structural yielding due phase transition

💡 Explanation

An uncontrolled nuclear chain reaction becomes a risk because the increased concentration of fissile isotopes enhances the probability of neutron-induced fission events; therefore, criticality accidents occur, rather than only isotopic decay common at lower concentrations.

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