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← ScienceWhich outcome occurs when the rate of control rod insertion rapidly increases within a nuclear reactor?
A)Neutron flux rapidly decreases.✓
B)Moderator temperature becomes homogenized.
C)Xenon-135 concentration reaches equilibrium.
D)Fuel cladding experiences uniform heating.
💡 Explanation
Neutron flux decreases because increased control rod insertion enhances neutron absorption via neutron-induced fission reactions; therefore, chain reactions slow or stop, rather than causing an increased moderator temperature elsewhere, without rapid boron absorption.
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