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Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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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.
D. Kwiat
Nuclear Science and Engineering | Volume 76 | Number 2 | November 1980 | Pages 255-257
Technical Note | doi.org/10.13182/NSE76-255
Articles are hosted by Taylor and Francis Online.
It is known that, based on Wigner's rational approximation, the escape probability function can be improved by the insertion of geometry dependent constants. Bonalumi improved this method by replacing these constants by a function. The formulas derived here, based on general considerations, justify the form given by Bonalumi and generalize it to spheres as well. The results for a cylinder and a sphere are compared to the exact tabulated values, and show an error of <0.3% through the whole spectral region. Only one parameter is needed here. The method is shown to be insensitive to this parameter to a certain extent. Comparison is also made with the results achieved by the P0 + AP2 method. The treatment here is limited to an isolated lump, for cylinders and spheres only.
