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Which risk increases when a nuclear power plant's cooling system malfunctions during processing of enriched uranium isotopes?

A)Moderator poisoning causes reduced reactivity
B)Steam generator corrosion accelerates rapidly
C)Delayed neutron emissions dangerously increase
D)Doppler broadening induces uncontrolled criticality

💡 Explanation

Doppler broadening occurs when the fuel temperature rises rapidly; because increased thermal motion of uranium isotopes reduces neutron capture, therefore the fission rate increases, potentially leading to uncontrolled criticality, rather than stable or reduced moderation characteristic of option A.

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