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Division Spotlight
Nuclear Criticality Safety
NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
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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.
N. B. Sullivan, J. J. Egan, G. H. R. Kegel, P. Harihar
Nuclear Science and Engineering | Volume 70 | Number 3 | June 1979 | Pages 294-297
Technical Paper | doi.org/10.13182/NSE79-A20150
Articles are hosted by Taylor and Francis Online.
The absolute 125-deg differential gamma-ray production cross section for the 1780-keV transition in the 28Si(n,n′γ)28Si reaction has been measured from 1.96- to 4.15-MeV bombarding energy. This transition represents the decay of the 2+ first excited state to the 0+ ground state of 28Si. The data were corrected for neutron multiple scattering as well as neutron and gamma-ray attenuation in the sample. The angle-integrated neutron scattering cross section was inferred from the gamma-ray production data using the shape of the gamma-ray angular distributions obtained from compound nucleus statistical model calculations. Incident neutrons were produced via the 3H(p,n)3 He reaction using a target ∼100 keV thick for 3.5-MeV protons, and this energy spread is reflected in the structure observed in the cross section.
