Which of the following nuclear reactors uses D₂O as a moderator?

Name: Which of the following nuclear reactors uses D 2 O as a moderator?
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D₂O is a code for heavy water, which is used as a moderator in heavy-water reactors. Graphite is another commonly used moderator, but it has a different code. Light-water reactors use regular water as both coolant and moderator, and molten salt reactors use a liquid salt mixture as both coolant and moderator. Nuclear fusion reactors do not use moderators at all.

Which of the Following Nuclear Reactors Uses D2O as a Moderator

Which of the Following Nuclear Reactors Uses D₂O as a Moderator