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September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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ANS joins others in seeking to discuss SNF/HLW impasse
The American Nuclear Society joined seven other organizations to send a letter to Energy Secretary Christopher Wright on July 8, asking to meet with him to discuss “the restoration of a highly functioning program to meet DOE’s legal responsibility to manage and dispose of the nation’s commercial and legacy defense spent nuclear fuel (SNF) and high-level radioactive waste (HLW).”
R. Gwin, R. R. Spencer, R. W. Ingle
Nuclear Science and Engineering | Volume 94 | Number 4 | December 1986 | Pages 365-379
Technical Paper | doi.org/10.13182/NSE86-A18347
Articles are hosted by Taylor and Francis Online.
A series of experiments was performed to measure the dependence on the incident neutron energy of the average number of prompt neutrons emitted per fission from 233U, 235U, and 239Pu relative to the average number of prompt neutrons emitted in spontaneous fission of 252Cf. The incident neutron energy range was 0.0005 to 10 MeV. A white neutron source was generated by the Oak Ridge Electron Linear Accelerator, and the energies of the neutrons incident on the fissile samples were determined by time-of-flight techniques. In each experiment the samples, including the 252Cf standard, were contained in a fission chamber surrounded by a large volume (0.91 m3) of liquid scintillator loaded with gadolinium. The fission chamber detected the fission events, and the scintillator detected the accompanying prompt neutrons. The resulting data were analyzed to yield: p(E) = p(E) (fissile)/p(252Cf). For 235U and 239Pu our results overlap, within the experimental uncertainty, the results of the evaluation of Manero and Konshin (1972), and in the case of 235U our data show the same general structure apparent in the evaluation up to 0.5 MeV. Our p(E) for 233U does not show the structure near 0.2 MeV obtained by Manero and Konshin.