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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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Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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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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How to talk about nuclear
In your career as a professional in the nuclear community, chances are you will, at some point, be asked (or volunteer) to talk to at least one layperson about the technology you know and love. You might even be asked to present to a whole group of nonnuclear folks, perhaps as a pitch to some company tangential to your company’s business. So, without further ado, let me give you some pointers on the best way to approach this important and surprisingly complicated task.
Weston M. Stacey, Jr.
Nuclear Science and Engineering | Volume 47 | Number 1 | January 1972 | Pages 29-39
Technical paper | doi.org/10.13182/NSE72-A28418
Articles are hosted by Taylor and Francis Online.
The influence of wide scattering resonances on group-averaged uranium and plutonium resonance cross sections and on group elastic removal cross sections is examined; the consequences for a Bondarenko-type LMFBR multigroup cross-section scheme are discussed. An analytical expression is derived for a constant effective cross section which adequately accounts for the sodium resonance in the computation of group-averaged uranium and plutonium resonance cross sections. Analytical expressions are derived for the group elastic removal cross sections, also. These latter are superior to the Bondarenko prescriptions in that they account for the location of a scattering resonance within a group and thus account for both the relative probability that a neutron scattered in the resonance will be scattered out of the group and for the relative flux shape within the group. The composition dependence of these expressions is shown to be characterized by a single parameter. Numerical results are presented for compositions that are typical of proposed LMFBRs.
