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Which outcome occurs when neutron moderator is lost in fission?

A)Fission reaction rate decreases
B)Control rods eject automatically
C)Criticality is unconditionally maintained
D)Fuel pellet temperature stabilizes

💡 Explanation

Loss of the neutron moderator reduces neutron thermalization, slowing down the rate of nuclear fission, because fewer neutrons induce further fissions. Therefore, the fission reaction rate decreases, rather than increasing criticality or stabilizing temperatures, which could only happen with moderation.

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