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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Uranium dioxide is produced by reducing uranium trioxide with hydrogen.
The first model-making experiments were carried out with natural uranium dioxide or even without a fuel particle.
Roth, High Temperature Reactions of Uranium Dioxide with Various Metal Oxides, NBS Circular 568 (1956).
Researchers from eight institutions, led by the Idaho National Engineering and Environment Laboratory (www.inel.gov), plan to add thorium dioxide to the uranium dioxide that powers commercial reactors to create a fuel that can sustain the reaction and increase the time between shutdowns.
Typically involving about 200 kg of melted uranium dioxide and zirconium dioxide, "our experiments are not small,' Powers says.
In one of his stories, Juracka pretended to be a German businessman interested in buying uranium, Then we got a tip that there was a trade with radioactive material going on, along with proof - a small piece of metal with radioactive uranium dioxide. In the end, the police took over the whole case.
In particular, a mixed grid pattern configuration within a standard 17x17 PWR fuel assembly envelope makes the entire fuel assembly all-metal by replacing an outer row of conventional uranium dioxide fuel rods that had been included in the company's earlier PWR fuel assembly design with multi-lobe metallic fuel rods.
Most power reactors rely on fuel consisting of uranium dioxide pellets surrounded by a zircaloy sheath.
Canada's Port Hope plant is the only uranium conversion facility in the country producing uranium hexafluoride (UF6) and the only commercial supplier of natural uranium dioxide (UO2) conversion services needed to produce fuel for Candu nuclear reactors.
Fuel bundles contain fuel elements made up of solid ceramic pellets of compressed uranium dioxide.
TEHRAN (FNA)- Head of the Atomic Energy Organization of Iran (AEOI) Ali Akbar Salehi Saturday inaugurated a new uranium dioxide unit in Central Iran.