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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.
Kaichao Sun, David Carpenter, Michael Ames, Akshay J. Dave, Lin-Wen Hu
Nuclear Technology | Volume 206 | Number 6 | June 2020 | Pages 924-937
Technical Paper | doi.org/10.1080/00295450.2019.1679564
Articles are hosted by Taylor and Francis Online.
The Transient Reactor Test (TREAT) Facility at Idaho National Laboratory (INL) was officially restarted in 2017. In support of its restart project, investigations are taking place into the refurbishment and upgrade of TREAT’s experiment systems with modern technology. In considering augmenting the current TREAT instrumentation, a variety of miniature neutron and gamma sensors that may be able to operate in-core will be irradiated under steady-state and transient conditions. The TREAT instrumentation is typically calibrated at steady state below 100 kW. This power level features a thermal flux similar to the Massachusetts Institute of Technology Research Reactor (MITR) at less than 100 kW. Low-power MITR operation was therefore chosen for initial instrumentation benchmarking. Following the MITR runs, the entire test assembly was shipped to INL. Shaped and temperature-limited transients were performed using TREAT’s M8-Calibration vehicle. A total of three test rounds has taken place, including two 1-week sessions at MITR and one 2-week session at TREAT. Overall, successful performance for the majority of the tested detectors is concluded under steady-state and transient conditions. These miniature sensors are capable of recognizing accurate full-width at half-maximum of the reactor pulse. However, compared to operation channels located at the TREAT biological shield, all in-core instrumentations show certain degrees of underestimation of the peak power magnitude.
