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← ScienceWhich outcome diminishes neutron multiplication during sustained nuclear fission?
A)Accumulation of fission product poisons✓
B)Increased moderator contamination by tritium
C)Decreased control rod immersion depth
D)Higher reflector scattering cross-section
💡 Explanation
Accumulation of neutron-absorbing 'poisons' like Xenon-135 causes neutron capture, via the neutron absorption mechanism, decreasing neutrons available for further fission reactions. Therefore, neutron multiplication decreases, rather than increasing reactivity without poison accumulation during fission.
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