heavy water


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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

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 ?
"It is exclusively Iran's responsibility to find a way to meet its [nuclear deal] commitments, whether that is by selling, diluting or disposing of future stocks of heavy water to remain within the [deal's] limit."
It is also, to varying degrees, about the significance of heavy water, Germany's wartime nuclear research, the sinking of the ferry, the vagaries of military intelligence in wartime, and the ethics of fighting a guerilla war in your own homeland.
Now, however, a Joint Intelligence Bureau report to spy chiefs dating from 1961 has come to light, stating, 'The main Israeli achievement in the importing line relates to 20 tonnes of heavy water ...
He said Britain had merely negotiated the sale back to Norway of surplus heavy water. That surplus was then sold on to Israel.
Federation of American Scientists (FAS) defence analyst John Pike said the photographs were "conclusive evidence that Pakistan has an indigenous heavy water production capability on the scale to support the operation of this reactor".
This is observed in pure heavy water in which there are no restrictions on the molecular mobilities.
About 10 years after his pioneering work, and when the Canadian nuclear program became a commercial reality, Rae resumed work on heavy water production processes.
"In the context of the Joint Comprehensive Plan of Action, the JCPOA's nuclear aspects, experts from the member nations have been tasked to elaborate practical measures to make it possible for Iran to export low enriched uranium and heavy water in bypassing the US sanctions," the Russia Foreign Ministry said.
ISLAMABAD -- Supra-glacial Lake formed at the Shisper Glacier has completely discharged after heavy water flow below the surging glacier and had reduced the risk for glacial flooding in the region.
The spokesman for the Atomic Energy Organization of Iran (AEOI) said the decision to replace the US with Britain in a working group tasked with redesigning the Arak heavy water reactor in central Iran was not made by Tehran.
The head of the IAEA chastised Iran last week for exceeding a limit on the amount of heavy water it can have on hand, saying that even a modest violation risks endangering support for the agreement.
WASHINGTON, Nov 9 (KUNA) -- The US State Department said on Wednesday that Iran plans to ship out heavy water which has exceeded its limit under the nuclear deal with major world powers.