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Division Spotlight
Nuclear Criticality Safety
NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
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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Nuclear Science and Engineering
May 2025
Nuclear Technology
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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.
I. G. Dillon, F. E. LeVert, P. A. Loretan, G. U. Menon, F. M. Siddiqi, H. J. Tarng
Nuclear Technology | Volume 12 | Number 3 | November 1971 | Pages 307-313
Technical Paper | Technique | doi.org/10.13182/NT71-A31011
Articles are hosted by Taylor and Francis Online.
A gamma attenuation method for obtaining the density of alkali methods has been demonstrated utilizing the gamma radiation from a 137Cs source. Density data have been obtained by this method for cesium and lithium up to 1053°K. Data obtained to date for cesium are in agreement with published values; data obtained for lithium are scattered and are lower than published values.
