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Division Spotlight
Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Latest News
BWXT will scout potential TRISO fuel production sites in Wyoming
BWX Technologies Inc. announced today that its Advanced Technologies subsidiary has signed a cooperation agreement with the state of Wyoming to evaluate locations and requirements for siting a potential new TRISO nuclear fuel fabrication facility in the state.
G. Giacchetti, C. Sari
Nuclear Technology | Volume 31 | Number 1 | October 1976 | Pages 62-69
Technical Paper | Fuel | doi.org/10.13182/NT76-A31699
Articles are hosted by Taylor and Francis Online.
Metallic molybdenum, Mo-Ru-Rh-Pd alloys, barium, zirconium, and tungsten have been added to uranium and uranium-plutonium oxides by coprecipitation and mechanical mixture techniques. This material has been treated in a thermal gradient similar to that existing in fuel during irradiation to study the behavior of molybdenum in an oxide matrix as a function of the O/(U+Pu) ratio and some added elements. The result of ceramographic and microprobe analysis shows that when the overall O/(U+Pu) ratio is <2, molybdenum and Mo-Ru-Rh-Pd alloy inclusions are present in the uranium-plutonium oxide matrix. If the O/(U+Pu) ratio is >2, molybdenum oxidizes to MoO2, which is gaseous at a temperature ∼1000°C. Molybdenum oxide vapor reacts with barium oxide and forms a compound that exists as a liquid phase in the columnar grain region. Molybdenum oxide also reacts with tungsten oxide (tungsten is often present as an impurity in the fuel) and forms a compound that contains ∼40 wt% of actinide metals. The apparent solubility of molybdenum in uranium and uranium-plutonium oxides, determined by electron microprobe, was found to be <250 ppm both for hypo- and hyperstoichiometric fuels.