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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.
Stuart A. Shiels, Chris Bagnall, Steven L. Schrock
Nuclear Technology | Volume 23 | Number 3 | September 1974 | Pages 273-283
Technical Paper | Material | doi.org/10.13182/NT74-A15919
Articles are hosted by Taylor and Francis Online.
A technique that has been developed to measure the “carbon potential” of heat transport system sodium involves the equilibration of low-carbon Type 304 stainless-steel foils at a standard temperature of 704°C (1300°F). The equilibrium carbon concentration of the foil in parts per million is used as the measurement of the carbon potential of the sodium and is, in fact, a direct function of the carbon activity of the sodium. Relationships between the carbon potential, Cs, and carbon equilibrium values in Types 304 and 316 stainless steel, Ce, at temperatures, T, have been developed by experimentation. These correlations allow the surface carbon levels in system components to be predicted without knowing the transporting species or the thermodynamic relationships between the carbon in the sodium and in the steels. The data have been applied to the fast flux test facility (FFTF) primary system after making certain assumptions concerning the carbon potential of the FFTF primary sodium. The results suggest that there is little or no driving force for carburization, but that mechanical compensation will be needed for decarburization in some regions.
