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    Question

    In nuclear reactor, heavy water is used as

    тАУ
    A coolant Correct Answer Incorrect Answer
    B fuel Correct Answer Incorrect Answer
    C moderator Correct Answer Incorrect Answer
    D atomic smasher Correct Answer Incorrect Answer

    Solution

    Heavy water is used in certain types of nuclear reactors where it acts as a neutron moderator to slow down neutrons so that they are more likely to react with the fissile uranium-235 than with uranium-238 which captures neutrons without fissioning. Because they do not require uranium enrichment, heavy water reactors are of concern in regards to nuclear proliferation.

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