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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
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
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.”
Chia-Lin W. Hsu, James A. Ritter
Nuclear Technology | Volume 116 | Number 3 | December 1996 | Pages 360-365
Technical Note | Enrichment and Reprocessing System | doi.org/10.13182/NT96-A35290
Articles are hosted by Taylor and Francis Online.
The combined use of nitric and formic acids, in lieu of formic acid alone, to reduce H2 emissions during the treatment of high-level radioactive waste sludge was investigated. The H2 generation can be mitigated substantially by substituting a fraction of formic acid with nitric acid as the required acid source, and then using formic acid as the required reductant source. The peak H2 generation rate was reduced by more than a factor of 2, and a more gradual rise in the H2 evolution resulted. However, the addition of mercury to the sludge increased the evolution of H2 as did increasing the amount of nitric acid used and the rate of addition of the formic acid source. Overall, these results provided clear insight into what controlled the evolution of H2 from high-level waste sludge and a means of mitigating it.