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← ScienceWhich outcome results when insufficient control rod immersion occurs in a nuclear reactor, leading to elevated neutron flux?
A)Uncontrolled chain reaction accelerates rapidly✓
B)Moderator efficiency temporarily sharply increases
C)Coolant density reaches flow rate maximum
D)Fuel cladding integrity momentarily stabilizes
💡 Explanation
Runaway fission develops because reduced control rod absorption causes a sustained, escalating chain reaction; therefore, increased heat production and radiation occur rapidly rather than moderate power operation because other negative feedback loops fail.
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