Heavy water

Nuclear Energy

Water with deuterium instead of ordinary hydrogen.

Heavy water (D2O) is an excellent neutron moderator with low absorption, used in CANDU reactors.

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The pressurized heavy water reactor (PHWR) uses natural uranium as fuel and heavy water as coolant and moderator. Most of them are of the CANDU type.

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Hydrogen isotope with one neutron.

Material that slows neutrons.