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← ScienceWhich outcome occurs when boron concentration decreases within a nuclear reactor's coolant?
A)Increased neutron moderation and fission✓
B)Reduced coolant temperature instability emerges
C)Decreased chance of control rod failure
D)Enhanced control over fuel cladding stress
💡 Explanation
Decreased boron enables increased _neutron moderation_, raising reactivity from increased thermal fissions, because boron absorbs fewer neutrons. Therefore, the fission rate increases, rather than coolant issues, which address a different physical restraint.
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