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Which risk increases sharply when neutron moderators are lost in a nuclear reactor core during fission?

A)Fuel cladding overheat and breach
B)Control rod insertion failure rate
C)Containment vessel pressure reduces
D)Coolant pump cavitation margins widen

💡 Explanation

Fuel overheat risk increases due to decreased control of the **neutron flux**, because the rate of collisions declines drastically, driving up the number of neutrons absorbed by the uranium directly therefore escalating the production of heat, rather than a controlled fission which can continue safely in stable and cooled conditions.

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