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← ScienceWhich outcome results when insufficient control rods limit neutron absorption within a nuclear reactor core during power generation?
A)Uncontrolled chain fission reaction✓
B)Decreased rate of hydrogen production
C)Moderator density feedback increases stability
D)Increased xenon-135 neutron absorption
💡 Explanation
An uncontrolled chain reaction will occur because moderation is reduced; the absence of neutron absorbers results in exponential increase in core reactivity, leading to escalating fission reactions, therefore a thermal runaway rather than other moderating effects. Neutron absorption fails to stop reaction.
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