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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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August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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.”
Giulio Riva, Adolfo Reggiori
Fusion Science and Technology | Volume 21 | Number 1 | January 1992 | Pages 31-40
Technical Paper | Plasma Engineering | doi.org/10.13182/FST92-A29703
Articles are hosted by Taylor and Francis Online.
A particular setup of the two-stage gun is described that is capable of smoothing the acceleration of cryogenic pellets used for tokamak refueling. The mathematical approach describes with sufficient accuracy the most important physical effects, with substantial improvements over an earlier model Experimental data are used to “tune” such parameters as the coefficients governing piston friction, heat losses in the pump tube, and gas friction along the barrel The available experimental results are correctly simulated by numerical calculations. Numerical results show that, under certain conditions, the two-piston version provides smoother pellet acceleration for the desired final velocity.