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Which effect accelerates transmutation in spent nuclear fuel?

A)Neutron capture cross-section increase
B)Moderator temperature coefficient reversal
C)Coolant voiding reactivity insertion
D)Delayed neutron fraction reduction

💡 Explanation

Increased neutron flux due to neutron capture cross-section increase enhances transmutation because the neutron flux dictates reaction rates, therefore transmutation occurs faster, rather than processes linked to temperature or reactivity that indirectly relate by changing reaction kinetics.

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