What is the purpose of moderator in a nuclear reactor?

1.	What is the purpose of moderator in a nuclear reactor?
A.	Moderate the fission temperature
B.	Reduce the speed of fast moving neutrons
C.	Reduce \[\beta \] and \[\gamma \] rays
D.	Absorb excess neutrons in the reactor
Answer» C. Reduce \[\beta \] and \[\gamma \] rays

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What is the purpose of moderator in a nuclear reactor?

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