Question

which is the best moderator in a nuclear reactor and why ? ​

Answer 1

Answer:

Explanation:

Water and carbon (graphite) are commonly known to be the best moderators. Water is a good moderator, but the hydrogens in the water molecule have a fairly high cross section for neutron capture, removing neutrons from the fission process. Heavy water, used as moderator in Canadian reactors, avoids this loss.

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Answer 2

Explanation:

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The best moderator in a nuclear reactor is heavy water because it is available in huge quantity I. the firm of liquid and it's mass is nearest to the mass of a neutron . According to the principle of mechanics fir maximum momentun transfer z the mass of incident particle must be equal to the mass of target particle .