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Which outcome results when Xe-135 builds up excessively within a light-water reactor?

A)Reduces power output with neutron absorption
B)Increases breeding of fissile plutonium-239
C)Causes increased kinetic energy of neutrons
D)Enhances fuel efficiency via chain reactions

💡 Explanation

Xe-135 building up causes reactor poison phenomena because it absorbs neutrons, drastically decreasing the reproduction factor in fission. Therefore, power output diminishes, rather than increasing breeding, enhancing efficiency, or increasing neutron kinetic energy.

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