heavy-water moderator

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• heavy water — water in which hydrogen atoms have been replaced by deuterium, used chiefly as a coolant in nuclear reactors. Also called deuterium oxide. [1930 35] * * * or deuterium oxide Water composed of two atoms of deuterium (D; a heavy isotope of… …   Universalium

• Heavy water reactor — Heavy water reactors use heavy water as a neutron moderator. Heavy water is deuterium oxide, D2O. Neutrons in a nuclear reactor that uses uranium must be slowed down so that they are more likely to split other atoms and get more neutrons released …   Wikipedia

• Heavy water —   Water containing a significantly greater proportion of heavy hydrogen (deuterium) atoms to ordinary hydrogen atoms than is found in ordinary (light) water. Heavy water is used as a moderator in some reactors because it slows neutrons… …   Energy terms

• heavy water — n 1) the compound D2O composed of deuterium and oxygen called also deuterium oxide 2) water having a higher than usual proportion of deuterium among its hydrogen atoms * * * a compound analogous to water but containing deuterium, the mass two… …   Medical dictionary

• Heavy water — Not to be confused with hard water or tritiated water. Deuterium oxide IUPAC name …   Wikipedia

• Heavy-water-moderated reactor —   A reactor that uses heavy water as its moderator. Heavy water is an excellent moderator and thus permits the use of in expensive natural (unenriched) uranium as fuel.   U.S. Dept. of Energy, Energy Information Administration s Energy Glossary …   Energy terms

• heavy water — noun water containing a substantial proportion of deuterium atoms, used in nuclear reactors • Syn: ↑deuterium oxide • Hypernyms: ↑moderator * * * ˈheavy water 7 [heavy water] noun …   Useful english dictionary

• Pressurised heavy water reactor — A pressurised heavy water reactor (PHWR) is a nuclear power reactor, commonly using unenriched natural uranium as its fuel, that uses heavy water (deuterium oxide D2O) as its coolant and moderator. The heavy water coolant is kept under pressure… …   Wikipedia

• heavy water — noun water containing deuterium instead of normal hydrogen (symbol DO); used as a moderator in nuclear reactors. Syn: deuterium oxide …   Wiktionary

• heavy water — noun water in which the hydrogen in the molecules is partly or wholly replaced by the isotope deuterium, used especially as a moderator in nuclear reactors …   English new terms dictionary

• Norwegian heavy water sabotage — Part of World War II The Vemork Hydroelectric Plant in 1935. The heavy water was …   Wikipedia