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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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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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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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Latest News
X-energy, Dow apply to build an advanced reactor project in Texas
Dow and X-energy announced today that they have submitted a construction permit application to the Nuclear Regulatory Commission for a proposed advanced nuclear project in Seadrift, Texas. The project could begin construction later this decade, but only if Dow confirms “the ability to deliver the project while achieving its financial return targets.”
Yiyang Zhang, Zhu Fang, Xinxin Wu, Haitao Wang, Libin Sun, Xiaowei Luo, Xiaowei Li (Tsinghua Univ)
Proceedings | 2018 International Congress on Advances in Nuclear Power Plants (ICAPP 2018) | Charlotte, NC, April 8-11, 2018 | Pages 84-93
The graphite dust, produced by friction of fuel pebbles, is a significant concern in potential accidents of HTGR because the graphite dust is closely coupled with radioactive fission product. The study of graphite particle-wall impaction is important to accurately estimate deposition rate of graphite dust. In this paper, both the spherical and non-spherical particle-wall impaction process are discussed based on FEM. By combining derived adhesion force with FEM, the results agree well with JKR model. The damping dissipation is employed to describe the energy loss, corresponding dimensionless damping coefficient is defined to establish the relation between damping coefficient and material properties. Meanwhile, the results of non-spherical particle impaction are also well predicted by dimensionless damping coefficient. It is also shown both adhesion force and damping dissipation are important at low incident velocity, while the effect of adhesion force is negligible and the dissipation is the dominant mechanism at high incident velocity. Besides, the contact area remains perfectly elastic deformation and never gets into failure when the incident velocity is lower than 20 m/s due to size effect. The results provide a possible approach for non-spherical particle-wall impaction, which can be combined with computational fluid dynamics (CFD) to estimate the deposition rate of graphite dust in HTGR.
