ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
Meeting Spotlight
2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott Downtown
Standards Program
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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Nuclear Science and Engineering
July 2025
Nuclear Technology
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Latest News
Comments on U.S. nuclear export controls on China
As trade negotiations are in the works between the United States and China, Washington, D.C., has the advantage in semiconductors but nuclear power is a different story, according to a June 9 article in the Hong Kong–based South China Morning Post.
C. D. Petrie, M. L. Storm, P. F. Zweifel
Nuclear Science and Engineering | Volume 2 | Number 6 | November 1957 | Pages 728-744
Technical Paper | doi.org/10.13182/NSE57-A35488
Articles are hosted by Taylor and Francis Online.
The calculation of averaged thermal diffusion coefficients and absorption cross sections for hydrogenous assemblies is discussed, and numerical results are presented. Comparison is made with available experimental information. The averages are taken over Wigner-Wilkins spectra, which assume moderation by a perfect gas of hydrogen atoms in the presence of a 1/v absorber. The Radkowsky prescription has been used to obtain transport cross sections for various compounds containing hydrogen. Power series expansions are presented which simplify the calculation of average diffusion coefficients for mixtures.
