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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.
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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
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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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Fusion Science and Technology
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.
J. Burt, S. J. Fielding, G. M. McCracken, G. Mezey, D. D. R. Summers†
Fusion Science and Technology | Volume 6 | Number 2 | September 1984 | Pages 399-404
Technical Paper | Selected papers from the Ninth International Vacuum Congress and the Fifth International Conference on Solid Surfaces (Madrid, Spain, September 26-October 1, 1983) | doi.org/10.13182/FST84-A23212
Articles are hosted by Taylor and Francis Online.
An r.f. assisted glow discharge cleaning system has been used on the DITE tokamak to remove low z impurities. Rapid cleaning of the system was achieved without baking following a major rebuild of the vacuum system and following subsequent exposures of the vacuum system to atmospheric pressure. Discharge cleaning with both pure hydrogen and with 1% added methane was used. However the ultimate impurity level could not be reduced below that corresponding to Zeff = 2.Clean single crystal silicon samples were exposed in the glow discharges. Analysis of these samples by RBS showed that there were high deposition rates of carbon, oxygen and metals in both the hydrogen and the hydrogen plus methane discharges.
