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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.”
Naoyuki Kisohara, Takeshi Moribe, Takaaki Sakai
Nuclear Technology | Volume 164 | Number 1 | October 2008 | Pages 103-118
Technical Paper | Icapp '06 | doi.org/10.13182/NT08-A4012
Articles are hosted by Taylor and Francis Online.
A sodium-heated steam generator (SG) being studied in Japan for a future commercialized fast reactor is a double-wall straight tube type. The SG is large to reduce its manufacturing cost by economies of scale. This paper addresses the multidimensional distributions of the temperature and the flow in the SG. Large heat exchanger components are prone to have nonuniform flow and temperature distributions. These maldistributions cause tubes to have thermal expansion mismatch, which might lead to structural issues such as tube buckling or tube-to-tube-sheet junction failure in straight tube SGs. The temperature profiles in the SG are examined by numerical methods, and flow distribution control devices are optimized to prevent these issues. The calculation model of the SG consists of two parts: a sodium inlet distribution plenum (the inlet plenum) and a heat transfer tube bundle region (the bundle). The flow and temperature distributions in the inlet plenum and the bundle are evaluated by the three-dimensional code FLUENT and the two-dimensional code MSG, respectively. The thermal loads on the tubes are evaluated by the structural code FINAS based on the temperature distributions. These codes have revealed that the sodium flow is distributed uniformly by the flow distributors and that the thermal loads remain within the allowable range for the structural integrity of the tubes and the junctions. An inlet plenum water test and an SG experiment to examine thermal-hydraulic performance are planned. These tests will reveal the flow and temperature distributions in the SG and verify the computer calculation results.