heavy water

(redirected from Heavy-water)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to Heavy-water: heavy-water reactor

heav·y wa·ter

D2O; water in which the hydrogen atoms are deuterium, or heavy hydrogen (2H), with physical properties that differ noticeably from those of ordinary water; an elevated presence will cause a decrease in metabolic activity; used as a moderator in nuclear reactors because of its capacity to absorb neutrons.
Synonym(s): deuterium oxide

heavy water

water in which the hydrogen component is deuterium (2H), or heavy hydrogen. It has properties different from those of ordinary water. Because of its ability to absorb neutrons, heavy water is used as a moderator in nuclear reactions. Also written as D2O.

heavy water

D2O; an isotopic variety of water, esp. deuterium oxide, in which hydrogen has been displaced by its isotope, deuterium. Its properties differ from ordinary water in that heavy water has a higher freezing and boiling point and does not support life.
See also: water
References in periodicals archive ?
India is developing its fleet of heavy-water reactors derived from CANDU.
The US and its allies have expressed concerns Iran could reprocess spent fuel from the heavy-water reactor into plutonium for building a nuclear warhead.
President Mahmoud Ahmadinejad, who inaugurated the heavy-water plant in central Iran, said that his country was not a threat even to Israel but insisted Tehran would not give up pursuing nuclear technology.
Some of the P5+1 group - the five permanent UN Security Council members plus Germany - proposed construction of a light water reactor, said Salehi, who explained that light-water reactors used for production of electricity while heavy-water ones produced isotopes.
Iran has been a building a heavy-water reactor near the plant for two years, but the reactor is not scheduled for completion until 2009, the Associated Press reported.
So far, clusters of up to 1,300 heavy-water molecules -- each of which contains a pair of deuterium atoms instead of two hydrogen atoms as in regular water -- have been sped up to several hundred thousand miles per hour.
It also maintains another route, the plutonium heavy-water route, to make nuclear bombs," Netanyahu said in a CBS "Face the Nation" interview.
Iran told the International Atomic Energy Agency (IAEA) in May about its program to build an experimental heavy-water nuclear reactor capable of producing plutonium, sources at the IAEA said Saturday.
The electrical energy splits the heavy-water molecules into their atomic constituents.
The upcoming visit by the IAEA inspectors comes after Tehran and the UN nuclear body signed a joint statement earlier this month under which Tehran agreed, on a voluntary basis, to allow IAEA inspectors to visit the Arak heavy-water plant.
At the meeting, talks will be held on Iran's plan to build an experimental heavy-water nuclear reactor which the United States maintains is a guise for developing nuclear weapons, sources close to the board of governors said.