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heavy water
(redirected from Heavy-water)

    Also found in: Wikipedia, Hutchinson 0.03 sec.
heavy water: see deuterium deuterium (dtēr`ēəm), isotope of hydrogen with mass no. 2.
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heavy water

 or deuterium oxide

Water composed of two atoms of deuterium (D; a heavy isotope of hydrogen) and one atom of oxygen (O), chemical formula D2O. Water from most natural sources contains about 0.015% deuterium oxide; this can be enriched or purified by distillation, electrolysis, or chemical processing. Heavy water is used as a moderator in nuclear power plants, slowing down the fast neutrons so that they can react with the fuel in the reactor. Heavy water is also used in research as an isotopic tracer for chemical reactions and biochemical pathways. Water with tritium (T2O) rather than deuterium may also be called heavy water.
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Canada suspended cooperation on a reactor and heavy-water plant; France sent a congratulatory telegram (and then withdrew it).
INDIA'S NUCLEAR BOMB: The Impact on Global Proliferation by Anderson, Robert (American businessperson and engineer) / Pacific Affairs
The controversy began March 23, 1989, when the two chemists claimed to have devised electrochemical cells, used to break heavy-water molecules into atoms, that produced so much heat energy that only nuclear reactions--such as the fusion of the water's deuterium atoms inside a cell's palladium electrode -- could be responsible (SN: 4/1/89).
Cold fusion: wanted dead or alive by Amato, I. / Science News
Slamming salvos of minuscule heavy-water cannonballs into a thumbnail-sized target containing heavy hydrogen produces micro-thermonuclear reactions in which some of the colliding atoms fuse, report scientists at the Brookhaven National Laboratory in Upton, N.
Colliding clusters hint at new fusion route by Amato, I. / Science News
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