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Which outcome results when cadmium control rods slowly degrade within a nuclear reactor core?

A)Increased neutron moderation over time
B)Decreased reactor criticality margin slowly
C)Reduced coolant flow within the core
D)Elevated gamma radiation near turbine halls

💡 Explanation

Reduced neutron absorption occurs, because gradual material loss drives decreased **neutron flux damping**, which then makes maintaining sufficient shutdown margin challenging; therefore criticality risks will increase rather than coolant or gamma increase, which are related but separate effects.

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