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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
2027 ANS Winter Conference and Expo
October 31–November 4, 2027
Washington, DC|The Westin Washington, DC 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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Latest News
Supreme Court rules against Texas in interim storage case
The Supreme Court voted 6–3 against Texas and a group of landowners today in a case involving the Nuclear Regulatory Commission’s licensing of a consolidated interim storage facility for spent nuclear fuel, reversing a decision by the 5th Circuit Court of Appeals to grant the state and landowners Fasken Land and Minerals (Fasken) standing to challenge the license.
John Sorensen
Nuclear Technology | Volume 83 | Number 3 | December 1988 | Pages 383-395
Technical Paper | Fifth International Retran Meeting / Heat Transfer and Fluid Flow | doi.org/10.13182/NT88-A34151
Articles are hosted by Taylor and Francis Online.
The possibility of instabilities under certain conditions of operation has been a special concern for boiling water reactors (BWRs). A stability analysis is performed to demonstrate that the total system and its primary components are inherently stable over the allowable operating envelope. The current methodology used by BWR fuel vendors for core reactivity and channel hydrodynamic stability is based on frequency domain analysis. RETRAN is the Electric Power Research Institute time domain system transient analysis code that is widely used by domestic and foreign utilities. RETRAN allows the reactor system to be modeled in a highly accurate manner including all important phenomena (linear and nonlinear) associated with anticipated and unforeseen conditions of operation. RETRAN is demonstrated to be adequate for the analysis of total plant stability, core reactivity stability, and channel hydrodynamic stability. All key phenomena are adequately modeled by RETRAN and core reactivity analyses have been shown to agree well with measured plant data.
