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Division Spotlight
Mathematics & Computation
Division members promote the advancement of mathematical and computational methods for solving problems arising in all disciplines encompassed by the Society. They place particular emphasis on numerical techniques for efficient computer applications to aid in the dissemination, integration, and proper use of computer codes, including preparation of computational benchmark and development of standards for computing practices, and to encourage the development on new computer codes and broaden their use.
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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.”
Hiroshi Okuno, Tomohiro Sakai
Nuclear Technology | Volume 140 | Number 3 | December 2002 | Pages 255-265
Technical Paper | Fuel Cycle and Management | doi.org/10.13182/NT02-A3337
Articles are hosted by Taylor and Francis Online.
In order to facilitate discussions based on quantitative analysis about the end effect, which was often talked about in connection to burnup credit in criticality safety evaluation of spent fuel, a burnup importance function was introduced. This function showed the burnup effect on the reactivity as a function of the fuel position; an explicit expression of this function was derived by considering a change in reactivity with respect to a slight variation in fuel burnup. The burnup importance function was applied to the Phase IIA benchmark model that was adopted by the Organization for Economic Cooperation and Development/Nuclear Energy Agency Expert Group on Burnup Credit Criticality Safety. The function clearly displayed that burnup importance of the end regions increased (a) as burnup, (b) as cooling time, (c) in consideration of burnup profile, and (d) in consideration of fission products. Comparison of the burnup importance for different initial enrichments was also shown.