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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.
Meeting Spotlight
Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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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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.
J. B. Yasinsky, L. R. Foulke
Nuclear Science and Engineering | Volume 44 | Number 1 | April 1971 | Pages 72-85
Technical Paper | doi.org/10.13182/NSE71-A18907
Articles are hosted by Taylor and Francis Online.
It is shown that the use of the standard spatial-differencing method when applied to space-time diffusion problems arising as the materials within a reactor are displaced can result in solutions which display a nonphysical time dependence. This irregular time dependence occurs when the spatial mesh and timestep are such that it takes several time steps for a movable material interface to move between two spatial meshpoints. New spatial difference equations, based on a specified piecewise polynomial flux behavior between meshpoints, are developed for the space-time group diffusion equations. Numerical studies show that these new difference equations eliminate the nonphysical time dependence of the solution for movable material problems. In addition, it is shown that for such problems the solutions resulting from the new difference equations are almost as accurate as solutions obtained using the standard difference equations with a much finer spatial mesh.
