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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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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.”
M. Matsukawa, Y. Miura, T. Kimura, K. Watanabe, T. Kubota, S. Kawashima
Fusion Science and Technology | Volume 34 | Number 3 | November 1998 | Pages 684-688
Magnetics and Superconductors (Poster Session) | doi.org/10.13182/FST98-A11963694
Articles are hosted by Taylor and Francis Online.
A vacuum circuit breaker (VCB) is one of the key components that constitute a quench-protection circuit for a superconducting coil. A water-cooled VCB having a continuous high-current carrying-capacity was newly designed and its model test was conducted. The target values of its performance were determined from the viewpoint of application to quench protection for superconducting coils in fusion devices as follows: (1) continuous current-carrying capacity of 25 kA or more, and (2) current interruption rating of 50 kA or more. Since thermally critical parts of the VCB are contacting surfaces of its electrodes, a key issue of the design is how to remove the heat generated on the surfaces in the electrodes from the vacuum area. For heat removal with good efficiency, the VCB was designed to possess a short fixed rod with a large coil outside the vacuum area and a fat movable rod where a water-cooling channel can be bored. Thus the new VCB has an up-down asymmetrical structure having the coil that provides co-axial magnetic field for stabilizing the current interruption property. Thermal characteristics of the VCB were analyzed by computer simulation. In addition, a model of the VCB was fabricated and tested to evaluate the characteristics. At the test of the model VCB, it was proved that the water-cooled VCB with a current-carrying capability of about 18 kA is feasible.