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Question

The substance used as a moderator in atomic reactors is:

A
boron
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B
cadmium
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C
uranium - 235
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D
heavy water
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Solution

The correct option is B heavy water
The substance used as a moderator in atomic reactors is heavy water. A nuclear medium is a medium that reduces the speed of fast neutrons, thereby, turning them into thermal neutrons capable of sustaining a nuclear chain reaction involving uranium - 235 or a similar fissile nuclide.

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