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Division Spotlight
Education, Training & Workforce Development
The Education, Training & Workforce Development Division provides communication among the academic, industrial, and governmental communities through the exchange of views and information on matters related to education, training and workforce development in nuclear and radiological science, engineering, and technology. Industry leaders, education and training professionals, and interested students work together through Society-sponsored meetings and publications, to enrich their professional development, to educate the general public, and to advance nuclear and radiological science and engineering.
Meeting Spotlight
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.”
Steven A. Arndt, Alan Kuritzky
Nuclear Technology | Volume 173 | Number 1 | January 2011 | Pages 2-7
Technical Paper | NPIC&HMIT Special / Nuclear Plant Operations and Control | doi.org/10.13182/NT11-A11478
Articles are hosted by Taylor and Francis Online.
For the past several years, the U.S. Nuclear Regulatory Commission and its contractors have been actively engaged in research to determine the capabilities and limitations of the state of the art of digital systems risk and reliability modeling. This program was developed to assess the capabilities of various modeling methods and to develop regulatory acceptance criteria for the use of digital system risk and reliability modeling in risk-informing digital system reviews. The program investigated both traditional and advanced modeling methods for the evaluation of digital system risk and reliability in the context of including these methods in current generation probabilistic risk assessments (PRAs). The methods investigated included traditional event tree/fault tree analysis, Markov modeling, and dynamic flow graph methodology. As part of the investigation into the capabilities of these methods, we have also reviewed the availability, capability, and practicality of the needed supporting data and analysis methods, including failure mode identification, data generation methods, and uncertainty analysis. The review indicated that for some digital systems traditional PRA modeling methods may be appropriate but that a number of potential issues exist that must be carefully evaluated in modeling these systems. Both the traditional and advanced modeling methods review found that the order of component failures can be important and that simulation either as part of the reliability model or as part of the supporting analysis is needed to determine the effects of combinations of component failures and the timing of digital system failures. Finally, the research showed that better data and models of fault-tolerant features of digital systems and software are needed to support more complete and accurate modeling of digital instrumentation and control for use in nuclear power plant PRAs.