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Division Spotlight
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.
Meeting Spotlight
2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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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Keeping up with Kewaunee
In October 2012, Dominion Energy announced it was closing the Kewaunee nuclear power plant, a two-loop 574-MWe pressurized water reactor located about 27 miles southeast of Green Bay, Wis., on the western shore of Lake Michigan. At the time, Dominion said the plant was running well, but that low wholesale electricity prices in the region made it uneconomical to continue operation of the single-unit merchant power plant.
Carl Klahr
Nuclear Science and Engineering | Volume 1 | Number 4 | August 1956 | Pages 253-267
Technical Paper | doi.org/10.13182/NSE56-A18601
Articles are hosted by Taylor and Francis Online.
Multigroup calculations of neutron flux and current in the reflector of a thermal reactor may be seriously in error at intermediate neutron energies. This is a consequence of the assumed linear flux variation with lethargy within each group that is implicit in the multigroup method. As a result, most multi-group treatments show marked deviations from age theory at distances of several slowing down lengths (or more) from the source region. Calculations have been made to show the variation of the error in a particular multigroup treatment as a function of distance from the source (measured in slowing down lengths) and of the number of groups.
