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Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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.”
K. Koizumi, M. Nakahira, K. Oka, Y. Itou, H. Takahashi, E. Tada, K. Ioki, G. Johnson, M. Onozuka, Y. Utin, G. Sannazzaro, F. Elio, K. Takahashi
Fusion Science and Technology | Volume 34 | Number 3 | November 1998 | Pages 586-590
International Thermonuclear Experimental Reactor (ITER) (Poster Session) | doi.org/10.13182/FST98-A11963677
Articles are hosted by Taylor and Francis Online.
Fabrication of a full-scale sector model of the ITER vacuum vessel, which was initiated in 1995 as one of the Large Seven ITER R&D Projects, was completed in September 1997. The full-scale sector model corresponds to an 18° toroidal sector, is composed of two 9° sectors, Sector A and B, which are spliced at the port center according to the current ITER design. In order to satisfy tight manufacturing tolerances of ± 5 mm and to assure the structural integrity of a double-walled structure, a combination of Gas Tungsten Arc (TIG)/Electron Beam (EB) welding and TIG/Gas Metal Arc (MIG) welding were adopted for Sector-A and B, respectively. Although the different fabrication procedures and welding techniques were employed for the fabrication, both sectors have successfully satisfied the dimensional accuracy of ± 3 mm for the total height, total width and total wall thickness. After the completion of fabrication, both sectors were shipped to the test site in Japan Atomic Energy Research Institute (JAERI) and assembly test was begun in October 1997. The first demonstration test of automatic narrow gap TIG welding of the field joints between sectors was successfully completed at the end of May 1998. This paper outlines the design and fabrication procedures and describes the results of the fabrication and assembly test of Sector A and B.