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Which consequence results when moderator density drops within a CANDU reactor?

A)Reduced neutron thermalization occurs
B)Prompt criticality becomes inevitable
C)Cladding oxidation rates decrease
D)Xenon-135 concentration equilibrates

💡 Explanation

Reduced moderator density decreases neutron moderation and therefore impacts fission because energy levels remain higher on average; therefore, fission probability decreases rather than increasing, whereas stable operating conditions require thermal neutrons.

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