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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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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DOE fast tracks test reactor projects: What to know
The Department of Energy today unveiled 10 companies racing to bring test reactors online by next year to meet Trump's deadline of next Independance Day, leveraging a new DOE pathway that allows reactor authorization outside national labs. As first outlined in one of the four executive orders on nuclear energy released by President Trump on May 23 and in the request for applications for the Reactor Pilot Program released June 18, the companies must use their own money and sites—and DOE authorization—to get reactors operating. What they won’t need is a Nuclear Regulatory Commission license.
W. N. Rankin, J. A. Kelley
Nuclear Technology | Volume 41 | Number 3 | December 1978 | Pages 373-380
Technical Paper | Radioactive Waste | doi.org/10.13182/NT78-A32121
Articles are hosted by Taylor and Francis Online.
Metal oxide precipitates (primarily iron oxide compounds) will form in the glass matrix of some compositions of vitrified nuclear waste, during cooling of the melt, whenever solubility limits are exceeded. These precipitates, containing part of the cesium and strontium radionuclides from the waste, are more resistant to leaching by water than the as-cast glass matrix. Some of the glass matrix compositions devitrify during heating for 1 month at 600°C with the formation of equal amounts of NaAlSiO4 (nepheline or carnegieite) and (Ca, Mn) (Mg, Fe, Mn) Si2O6, plus a small amount of Ca4Fe14O25. The leachability of devitrified glass can be up to 100 times greater than the leachability of as-cast glass. The appearance and structure of the metal oxide precipitates are unaffected by the temperature conditions that caused devitrification of the glass matrix. The metal oxide precipitate particles are less leachable in water than any of the phases in the devitrified matrix.
