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Division Spotlight
Education, Training & Workforce Development
The Education, Training & Workforce Development Division provides communication among the academic, industrial, and governmental communities through the exchange of views and information on matters related to education, training and workforce development in nuclear and radiological science, engineering, and technology. Industry leaders, education and training professionals, and interested students work together through Society-sponsored meetings and publications, to enrich their professional development, to educate the general public, and to advance nuclear and radiological science and engineering.
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.
J. K. Dickens, T. A. Love, J. W. McConnell, R. W. Peelle
Nuclear Science and Engineering | Volume 78 | Number 2 | June 1981 | Pages 126-146
Technical Paper | doi.org/10.13182/NSE81-A20099
Articles are hosted by Taylor and Francis Online.
Absolute fission-product decay energy-release rates have been measured for thermal-neutron fission of 239Pu and 241Pu. Spectral data were obtained using scintillation spectrometers for beta and gamma rays separately and were processed to the form of total yield and total energy-release integrals per fission for each set of time-interval parameters. The irradiations were for 1, 5, and 50 (241Pu) or 100 (239Pu) s, and measurements were made covering times following irradiation from 1.7 to 13 950 s. The separate beta- and gamma-ray energy-release data were summed to obtain the total (β + γ) energy-release rates for the cases studied. The data are processed to provide two standard representations of decay energy release, the one following a fission pulse and the other following an infinite fission period. Complete representations of estimated uncertainties are given in the form of variance-covariance matrices for the first time. For the pulse representation of the data, diagonal components correspond to uncertainties in the range of 3 to 6%, with correlation coefficients in the range from 0.1 to 0.5. Comparisons with other experimental data show that the present results are generally smaller than the other data, in some cases by more than the estimated uncertainties. The present results are also smaller than those included in the current American National Standard Decay Heat Power in Light Water Reactors, ANSI/IANS-5.1-1979, for 239Pu by 2 to 4% for the time interval 2 to 14 000 s. For 241Pu decay heat, the present data are larger than previously obtained experimental 235U data but smaller than the adopted 235U standard in ANSI/ANS-5.1-1979. The importance of these comparisons for analyses using the new Standard is presented.
