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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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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.
H. A. Vincent, A. Volborth
Nuclear Technology | Volume 3 | Number 12 | December 1967 | Pages 753-757
Technical Paper and Note | doi.org/10.13182/NT67-A27793
Articles are hosted by Taylor and Francis Online.
Silicon is determined by irradiating powdered rock samples with 14-MeV neutrons in a system that allows dual transfer of samples. The 1.78-MeV gammas of the 28Al produced are counted as representing silicon in the sample. The unknown and reference sample positions for irradiation and counting are switched on consecutive irradiation count cycles with four of these cycles constituting a single determination. The standard deviation for a single determination is 0.12% silicon. Pure quartz is used as a reference. Results of analysis of some standard rock powders compare favorably with accepted values. New values are given for 10 standard rocks.
