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Division Spotlight
Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
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!
Latest Magazine Issues
Jul 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
August 2024
Nuclear Technology
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.”
Gaku Takase, Yoshihisa Hiraki, Kazuyuki Takase (Nagaoka Univ of Technology), Isamu Kudo, Keisuke Tanizawa, Shogo Taira (Avdan Eng. Co. Ltd.)
Proceedings | Advances in Thermal Hydraulics 2018 | Orlando, FL, November 11-15, 2018 | Pages 957-960
Fuel debris which is removed from the Fukushima Dai-ichi Nuclear Power Plant is packed to the radioactive waste long-term storage containers. When the fuel debris includes water, hydrogen and oxygen are gener-ated by decomposition of water by radiation from the fuel debris. Since hydrogen is flammable gas, it has a high risk of combustion and explosion. Therefore, it is important to clarify the hydrogen behavior in the radioactive waste long-term storage container under the conditions that the fuel debris containing water is accumulated. As for former studies of hydrogen behavior in the sealed container, experimental and analyt-ical studies on hydrogen behavior under the various conditions of the fuel debris have not been conducted sufficiently. Then, the influence of hydrogen flow rate, temperature, porosity, etc. upon the hydrogen be-havior was investigated experimentally and numerically. Moreover, reduction of hydrogen concentration by the passive autocatalytic recombiner which is installed in the storage container was studied. The present study shows the controlling factors on hydrogen behavior in the storage container and the results on reduc-tion of the hydrogen concentration by PARs.