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Division Spotlight
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
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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Fusion Science and Technology
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.”
Ikuji Takagi, Kouta Kodama,* Kazuo Shin, Kunio Higashi, Hideki Zushi, Tohru Mizuuchi, Tohru Senjyu, Masahiro Wakatani, Tokuhiro Obiki
Fusion Science and Technology | Volume 25 | Number 2 | March 1994 | Pages 137-146
Technical Paper | First-Wall Technology | doi.org/10.13182/FST94-A30263
Articles are hosted by Taylor and Francis Online.
Two experiments on the plasma-driven permeation (PDP) of deuterium through nickel membranes were conducted. One was an observation of the permeation during the discharge cleaning of Heliotron E, one of the largest helical systems. Significant amounts of deuterium permeated. The deuterium permeation was also observed during a helium discharge, where deuterium recycled between the plasma and chamber walls. Because the permeation was strongly influenced by impurities such as oxygen on the plasma-facing surface of the membrane, the PDP would be useful for a diagnosis of the discharge cleaning. The second experiment was a study on transient behaviors of the permeation when nickel membranes were exposed to a deuterium plasma for short times. The small device with a radio-frequency plasma was used to simulate pulse operations of large plasma devices. The maximum permeation flux at the nonsteady state was found to be nearly proportional to the exposure time of the plasma. Numerical calculations reproduced very well the transient behaviors of the deuterium permeation in the pulse-exposure experiments. Based on the results of the two experiments, it is expected that the deuterium PDP from neutral beam injection-heated plasmas in Heliotron E will be observed.