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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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2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott Downtown
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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Former NRC commissioners lend support to efforts to eliminate mandatory hearings
A group of nine former nuclear regulatory commissioners sent a letter Wednesday to the current Nuclear Regulatory Commission members lending support to efforts to get rid of mandatory hearings in the licensing process, which should speed up the process by three to six months and save millions of dollars.
Suxia Hou, Fuyu Zhao, Yun Tai, Liu Cheng
Nuclear Technology | Volume 169 | Number 2 | February 2010 | Pages 126-133
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT10-A9357
Articles are hosted by Taylor and Francis Online.
Two-phase flow instability in parallel channels of a once-through steam generator (OTSG) is systematically analyzed by the modern frequency domain method. The mathematical expressions of heat transfer and flow for an OTSG are proposed, and the transfer function of the closed-loop system is deduced by the use of linearization and Laplace transfer. The OTSG's stability is judged according to the Nyquist Stability Criterion. The instability of OTSG in two cases (single-channel model and multichannel model) is researched, respectively, for a numerical example. The result shows the classical frequency domain method can be commonly used when the coupling effects in the system are negligible, and it is only a special case of the multivariable method. Furthermore, the stability sensitivity to the operating parameters is analyzed for the OTSG in this paper. The predicted results are in agreement with the experimental results given in the literature.
