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Decommissioning & Environmental Sciences
The mission of the Decommissioning and Environmental Sciences (DES) Division is to promote the development and use of those skills and technologies associated with the use of nuclear energy and the optimal management and stewardship of the environment, sustainable development, decommissioning, remediation, reutilization, and long-term surveillance and maintenance of nuclear-related installations, and sites. The target audience for this effort is the membership of the Division, the Society, and the public at large.
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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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Latest News
DOE extends Centrus’s HALEU production contract by one year
Centrus Energy has announced that it has secured a contract extension from the Department of Energy to continue—for one year—its ongoing high-assay low-enriched uranium (HALEU) production at the American Centrifuge Plant in Piketon, Ohio, at an annual rate of 900 kilograms of HALEU UF6. According to Centrus, the extension is valued at about $110 million through June 30, 2026.
Robert E. Miles
Nuclear Science and Engineering | Volume 79 | Number 2 | October 1981 | Pages 239-245
Technical Note | doi.org/10.13182/NSE81-A27414
Articles are hosted by Taylor and Francis Online.
A new approach is presented for handling problems involving radioactive decay, buildup, and mass transfer. This method uses recursion relations for computing the exponential terms that makes the computation fast and efficient. The concepts of a path specific probability function and a cumulative transfer probability function are introduced and used in developing a general equation. This general equation permits branching from a parent to any daughter nuclide further down the decay chain and also mass transfer to other compartments linked by first-order transfer rate constants. Backward branching or feedback mechanisms, however, are not permitted. Treatment for problems involving singularities is also presented. The method has been found to be useful for many practical applications such as fission product buildup in nuclear reactor cores and releases from reactor plants.