uranium dioxide


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Related to uranium dioxide: Uranium tetrafluoride, Uranium fluoride

uranium dioxide

[yə′rā·nē·əm dī′äk‚sīd]
(inorganic chemistry)
UO2 Black, highly toxic, spontaneously flammable, radioactive crystals; insoluble in water, soluble in nitric and sulfuric acids; melts at approximately 3000°C; used to pack nuclear fuel rods and in ceramics, pigments, and photographic chemicals. Also known as urania; uranic oxide; uranium oxide.
References in periodicals archive ?
This compound can be prepared from uranium dioxide and uranium hydride by the following process: UO2 + 4 HF UF4 + 2H2O (500 oC, endothermic) UF4 + F2 UF6 (350 oC, endothermic).
Uranium dioxide is produced by reducing uranium trioxide with hydrogen.
The unit, which was inaugurated by Salehi in a ceremony in Isfahan Fuel Complex today, is to produce enriched uranium dioxide (UO2) with less than five percent purity.
Thus, a more empirical approach would be to use a substantially pure uranium compound for laboratory simulation study such as uranium dioxide (UO2).
In the accident last month, the worker was exposed to radiation when a minute amount of uranium scattered from a machine that produces uranium dioxide pellets.
Uranium dioxide pellets are produced which are then encased in long metal tubes to form fuel rods.
IAEA investigation of allegations that Iran is pursuing the "Green Salt Project" (for conversion of uranium dioxide into UF4, the precursor for UF6 that is used in an enrichment plant), as well as high explosives and missile reentry vehicle designs, has yielded little information thus far from Iranian officials, who say the allegations are baseless.
The enriched UF6 is then converted to uranium dioxide, or UO2, which is packaged in the fuel bundles used in nuclear reactors.
The Boeing official insisted that the counterweights would not emit poisonous clouds of uranium dioxide, unless they were "exposed to a fire of 800 degrees Celsius [1472 [degrees] F] for more than four hours.
The fuels in commercial power reactors today, though termed "ceramics," are really metallic oxides such as uranium dioxide.
We've now proven that it is possible to distinguish between uranium dioxide and uranium hydroxide, and to resolve the size and shape of the materials inside the package with phenomenal precision," Scott said.
As per the recent report, Iran established a uranium-conversion plant which will yield uranium dioxide and in the unit of uranium dioxide, a production has been set up in the UCF complex in central Iran's Isfahan province.