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← ScienceWhich outcome accelerates within a nuclear reactor using unenriched uranium fuel due to control rod failure?
A)Moderator neutron absorption decreases locally
B)Delayed neutron fraction greatly increases
C)Fission chain reaction exponentially amplifies✓
D)Xenon-135 concentration dynamically stabilizes power
💡 Explanation
A control rod failure results in less neutron absorption because fewer neutrons are captured, and this causes an uncontrolled fission chain reaction, therefore nuclear fuel heats and potentially melts down, rather than a localized decrease that the moderator could compensate for.
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