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← ScienceWhich consequence results when fuel rods contain excess Xenon-135?
A)Neutron absorption decreases chain reaction✓
B)Delayed neutron emission induces instability
C)Fission product buildup accelerates fuel consumption
D)Moderator temperature profile becomes non-uniform
💡 Explanation
Increased Xenon-135 causes neutron absorption (neutron poisoning), stalling the nuclear chain reaction, because the isotope has a large neutron capture cross-section; therefore, fission rate decreases, rather than other cited thermal or kinetic effects from fission fragments.
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