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Nuclear Nonproliferation Policy
The mission of the Nuclear Nonproliferation Policy Division (NNPD) is to promote the peaceful use of nuclear technology while simultaneously preventing the diversion and misuse of nuclear material and technology through appropriate safeguards and security, and promotion of nuclear nonproliferation policies. To achieve this mission, the objectives of the NNPD are to: Promote policy that discourages the proliferation of nuclear technology and material to inappropriate entities. Provide information to ANS members, the technical community at large, opinion leaders, and decision makers to improve their understanding of nuclear nonproliferation issues. Become a recognized technical resource on nuclear nonproliferation, safeguards, and security issues. Serve as the integration and coordination body for nuclear nonproliferation activities for the ANS. Work cooperatively with other ANS divisions to achieve these objective nonproliferation policies.
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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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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WIPP’s SSCVS: A breath of fresh air
This spring, the Department of Energy’s Office of Environmental Management announced that it had achieved a major milestone by completing commissioning of the Safety Significant Confinement Ventilation System (SSCVS) facility—a new, state-of-the-art, large-scale ventilation system at the Waste Isolation Pilot Plant, the DOE’s geologic repository for defense-related transuranic (TRU) waste in New Mexico.
R. Gwin, R. R. Spencer, R. W. Ingle, J. H. Todd, S. W. Scoles
Nuclear Science and Engineering | Volume 88 | Number 1 | September 1984 | Pages 37-55
Technical Paper | doi.org/10.13182/NSE84-A17138
Articles are hosted by Taylor and Francis Online.
Measurements were made of the energy dependence of the 235U neutron fission cross section over the energy range from 0.01 eV to 30 keV and of the 239Pu fission cross section over the range from 0.01 to 60 eV. The energy integral of the fission cross section for 235U was normalized to 19.26 b·eV in the 0.0206- to 0.06239-eV interval; this yielded a value of 248 ± 1.7 b·eV for the 7.8- to 11-eV interval, which is in good agreement with other measurements normalized in the same manner. The energy integral for 239Pu was normalized to 25.15 b·eV in the 0.02001- to 0.06001-eV interval; the resulting value of 504 b·eV in the 9- to 12.6-eV interval was also in good agreement with other data. For the energy ranges covered, the energy dependence of both the 235U fission cross section and the 239Pu fission cross section is consistent with ENDF/B-V data except f or a few energy intervals in which the 235U cross section differs by as much as 4%.
