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Question

Heavy water is used as a moderator in a nuclear reactor. The function of the moderator is ________.


A
to control the energy released in the reactor
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B
to absorb neutrons and stop the chain reaction
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C
to cool the reactor
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D
to slow down the neutrons to thermal energy
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Solution

The correct option is D to slow down the neutrons to thermal energy
Function of moderator is to absorb the fast moving neutrons and slow them down so that uranium can them to carry out fission reaction.

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