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Which consequence occurs when nuclear fuel, specifically enriched uranium isotopes, nears complete consumption in a reactor?

A)Neutron flux profiles become severely skewed
B)Bremsstrahlung radiation drops exponentially
C)Control rod effectiveness improves drastically
D)Delayed neutron fraction experiences no change

💡 Explanation

Near fuel depletion, unequal consumption of fissile uranium isotopes leads to significant spatial changes, resulting in skewed neutron flux profiles because fission density shifts across the assembly due to spatial self-shielding. Therefore we have skewed flux, rather than other radiation changes, under these operating constraints.

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