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← ScienceWhich mechanism limits uranium fission efficiency within fuel rods?
A)Reduced average neutron path length
B)Increasing parasitic neutron capture
C)Incomplete strong force binding
D)Accumulation of fission product poisons✓
💡 Explanation
Fission product poisoning reduces fission efficiency because certain isotopes absorb thermal neutrons, inhibiting sustained chain reactions. Xenon-135 exhibits extremely high neutron absorption cross-section, therefore accumulates within the fuel rods rather than decaying into stable isotopes.
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