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Which consequence results when xenon gas accumulates inhomogeneously in a nuclear reactor core?

A)Spontaneous, localized power oscillations start
B)Fuel cladding reaches creep rupture threshold
C)Control rod effectiveness substantially increases
D)Neutron flux distribution becomes extremely uniform

💡 Explanation

Localized xenon buildup leads to spatial oscillations because xenon-135 strongly absorbs neutrons, diminishing fission locally; therefore, power surges occur rather than a stabilized flux, because other areas compensate, amplifying the effect of neutron absorption.

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