Question

Q16. Which of the following is used as moderator in nuclear reactors? *​

Answer 1

"Light water" is the most commonly used moderator (roughly 75% of the world's reactors) although the term is slightly ambiguous, usually meaning natural fresh water, but could also refer to deuterium-depleted water. Solid graphite (20% of reactors) and heavy water (5% of reactors) are the main alternatives.

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