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← ScienceWhich safety risk increases during sustained uranium fission?
A)Shielding from bremsstrahlung radiation fails
B)Moderator neutron absorption rate increases
C)Accumulation of fission product poisons occurs✓
D)Fuel cladding mechanical strength is weakened
💡 Explanation
Xenon-135 accumulation absorbs neutrons, exhibiting neutron poisoning, because its high neutron cross-section reduces the chain reaction. Therefore, reactor power declines unless control rods compensate, rather than changes in radiation alone driving safety issues.
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