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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
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver 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
TerraPower begins U.K. regulatory approval process
Seattle-based TerraPower signaled its interest this week in building its Natrium small modular reactor in the United Kingdom, the company announced.
TerraPower sent a letter to the U.K.’s Department for Energy Security and Net Zero, formally establishing its intention to enter the U.K. generic design assessment (GDA) process. This is TerraPower’s first step in deployment of its Natrium technology—a 345-MW sodium fast reactor coupled with a molten salt energy storage unit—on the international stage.
F. S. Gunnerson, D. T. Sparks, D. K. Kerwin
Nuclear Technology | Volume 52 | Number 1 | January 1981 | Pages 86-99
Technical Paper | Fuel | doi.org/10.13182/NT81-A32692
Articles are hosted by Taylor and Francis Online.
An in-pile power-cooling-mismatch (PCM) test designed to investigate the behavior of a nine-rod PWR-type fuel bundle under intermittent and sustained periods of high temperature film boiling operation was recently conducted. Emphasis was placed on departure from nucleate boiling (DNB) and return to nucleate boiling (RNB), rod-to-rod interactions, and fuel rod failure. Results indicate that power-coolant variations induced DNB and RNB within the nine-rod test bundle in an irregular, nonsymmetric fashion. Direct rod-to-rod DNB, RNB, and fuel rod failure propagation were not observed. However, a single rod-to-rod interaction was suspected, that being RNB of one rod abetting the onset of DNB on an adjacent rod. This interaction was possibly due to hydraulic coupling. The power and inlet coolant conditions at the onset of DNB on the center fuel rod were indistinguishable from previously obtained PCM data for separately shrouded test rods; thus, the single-rod data base may be applicable for assessing the onset of DNB conditions of an interior fuel rod within a small cluster.
