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Division Spotlight
Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
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.”
Kevin Segard, Richard Brock, Keith Higar (U.S. Fuels, Framatome), Sebastian Kuch (Fuels Germany, Framatome)
Proceedings | Advances in Thermal Hydraulics 2018 | Orlando, FL, November 11-15, 2018 | Pages 1234-1247
Framatome has recently developed ARITA, a statistical Non-LOCA methodology based on the external coupling of the 3D core simulator ARTEMIS and the system thermal-hydraulics code S-RELAP5. As part of the qualification of the coupled approach used in ARITA, operating plant transients were analyzed. This paper considers one of these transients; a planned Loss of External Load transient performed on a 1300 MWe plant. This transient was initiated at End-of-Cycle conditions while in coastdown. The purpose of the transient was to measure plant responses to a Loss of External Load. An ARTEMIS/S-RELAP5 model was developed to simulate the transient and provide comparison data. Deviations between calculated and measured results are well behaved and show that ARTEMIS/S-RELAP5 provide a good representation of an operating reactor during transient conditions. The observed maximum deviation in the short-term corrected power is less than 1% rated thermal power, the maximum average coolant temperature deviation is less than 1 °C, and primary pressure difference during the initial peak is within 1 bar, while the peak near the end of the transient is within 2 bar. When steam generator level stabilizes, the final measured level is slightly over-predicted by about 3%. ARTEMIS trends well with the fixed incore detectors.
ARITA, ARTEMIS, COBRA-FLX and S-RELAP5 are trademarks or registered trademarks of Framatome in the USA or other countries.