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Which consequence occurs when Xenon-135 concentrates within a reactor core?

A)Reactor power level decreases rapidly
B)Fuel rod temperatures increase linearly
C)Neutron flux distribution becomes uniform
D)Delayed neutron production rate increases

💡 Explanation

Xenon-135 is a strong neutron absorber, therefore reactor power drops rapidly due to *neutron poisoning* following uranium fission. This is because it absorbs neutrons, rather than leading to increased temperature or altered flux.

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