ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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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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Latest News
BREAKING NEWS: Trump issues executive orders to overhaul nuclear industry
The Trump administration issued four executive orders today aimed at boosting domestic nuclear deployment ahead of significant growth in projected energy demand in the coming decades.
During a live signing in the Oval Office, President Donald Trump called nuclear “a hot industry,” adding, “It’s a brilliant industry. [But] you’ve got to do it right. It’s become very safe and environmental.”
F.H. Fröhner
Nuclear Science and Engineering | Volume 103 | Number 2 | October 1989 | Pages 119-128
Technical Paper | doi.org/10.13182/NSE89-A28501
Articles are hosted by Taylor and Francis Online.
The state of the JEF-2 evaluation of 238 U + n cross sections in the region of unresolved resonances (∼10 to 300 keV) is reported with special emphasis on recent progress in theory (rigorous expressions for resonance-averaged cross sections with arbitrary level overlap), which permits reliable model-aided evaluation and parameterization by simultaneous fits to total, capture, and inelastic scattering cross-section data. Formalized inclusion of information from resolved resonances via Bayes' theorem has helped to remove discrepancies between resolved and unresolved parameters and has improved resonance statistics. Comparison with the latest ENDF/B-VI (pointwise) evaluations of the capture and the total cross sections shows agreement within 1 to 3%.
