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Division Spotlight
Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
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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.”
Yuuji Okamoto, Masayuki Yoshikawa, Naohiro Yamaguchi, Chikara Watabe, Eiichirou Kawamori, Yoshihiko Watanabe, Takatoshi Furukawa, Teruo Tamano, Kiyoshi Yatsu
Fusion Science and Technology | Volume 39 | Number 1 | January 2001 | Pages 293-296
Poster Presentations | doi.org/10.13182/FST01-A11963464
Articles are hosted by Taylor and Francis Online.
Measurements of spectra in the wavelength range from vacuum ultraviolet (VUV) to soft X-ray are important means to diagnose impurities in magnetically confined plasmas used in fusion plasmas such as a GAMMA 10 plasma. Recently, a space- and time-resolving flat-field grazing-incidence VUV spectrograph was constructed for the simultaneous observation of spatial, temporal and spectral distributions of plasma radiation in the wavelength range of 150-1050 Å. Absolute calibration experiments of the space- and time-resolving VUV spectrograph in the wavelength range of 450-1050 Å were performed for the first time under both S and P polarized light conditions at beamline 11C in the Photon Factory at the High Energy Accelerator Research Organization. Thus, we can obtain radial profiles of the absolute emissions from the impurities by using Abel inversion, and estimate the density of impurity ions such as oxygen, carbon and so on. From the total impurity ion densities, we can estimate Zeff. During the formation of plug potential by ECRH, the highly-ionized impurities increased as a result of rising of electron temperature. The Zeff with plug potential is larger than that without plug potential.