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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.
Yakov Ben-Haim, Ezra Elias, Alexander Knoll
Nuclear Technology | Volume 52 | Number 1 | January 1981 | Pages 121-128
Technical Paper | Technique | doi.org/10.13182/NT81-A32696
Articles are hosted by Taylor and Francis Online.
Highly accurate accounting methods for sensitive nuclear material (SNM) are necessary to safeguard against material diversion to unauthorized purposes. These accounting methods depend in part on measurement of the activity of SNM in radwaste containers. The activity measured for a particular container depends on the mass of SNM and on the spatial distribution of the material within the container. Interpretation of measured activity in terms of contained mass is ambiguous unless the spatial distribution is known. A statistical measure has been developed that enables one to evaluate the confidence to be had in assuming homogeneous spatial distribution of the SNM. For situations where the SNM distribution is not limited to the single homogeneous case, a technique is described by which the measured activity can be interpreted in terms of a probability distribution of the contained mass of nuclear material