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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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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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
Vogtle-3 shuts down for valve issue
One of the new Vogtle units in Georgia was shut down unexpectedly on Monday last week for a valve issue that has since been investigated and repaired. According to multiple local news outlets, Georgia Power reported on July 17 that Unit 3 was back in service.
Southern Company spokesperson Jacob Hawkins confirmed that Vogtle-3 went off line at 9:25 p.m. local time on July 8 “due to lowering water levels in the steam generators caused by a valve issue on one of the three main feedwater pumps.”
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.
