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
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
Meeting Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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
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.
C. V. Smith, N. E. Scofield
Nuclear Science and Engineering | Volume 47 | Number 1 | January 1972 | Pages 1-7
Technical paper | doi.org/10.13182/NSE72-A28415
Articles are hosted by Taylor and Francis Online.
This paper shows the results of a gamma-ray backscattering calculation using the moments method. Results are shown for the differential angular energy distribution of gamma-ray flux backscattered from semi-infinite media of aluminum and iron. A plane normal source of 0.66-MeV gamma rays from 137Cs is simulated in the calculation. A comparison is shown between the calculated albedo spectra and results from an experiment. The calculated albedo distributions were slightly higher in the multiple scattering peak area for angles greater than 130 deg; otherwise, the comparisons were very good. The slight discrepancies can be explained by the finite slab boundary effects from the experiment.
