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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.”
F. Leuterer, M. Münich, F. Brandl, H. Brinkschulte, G. Grünwald, A. Manini, F. Monaco, F. Ryter, H. Schütz, J. Stober, D. Wagner, W. Kasparek, G. Gantenbein, L. Empacher, C. Lechte, H. Kumric, P. Schüller, A. Litvak, A. Chirkov, G. Denisov, A. Fix, V. Illin, S. Malygin, V. Miasnikov, V. Nichiporenko, L. Popov, E. Tai, V. Zapevalov
Fusion Science and Technology | Volume 55 | Number 1 | January 2009 | Pages 31-44
Technical Paper | Electron Cyclotron Emission and Electron Cyclotron Resonance Heating | doi.org/10.13182/FST09-A4051
Articles are hosted by Taylor and Francis Online.
In 1989 the planning for a 140-GHz, 2-MW, 2-s electron cyclotron resonance heating system for ASDEX Upgrade started. These plans were finally approved in 1993. The system comprises four gyrotrons with four separate transmission lines and launchers. Although a 0.5-s test gyrotron was already installed in autumn 1994, it was only in summer 1997 when the first gyrotron of the final system was ready for use in the experiments, and in spring 2000 the system was completed with all four gyrotrons. This paper reviews the experience gained in construction and operation of this system. In particular, we describe how we solved problems with external magnetic fields affecting gyrotron operation. These fields originate both from the tokamak and from the cryomagnet of adjacent gyrotrons. We also report about the gyrotron performance, our techniques for the alignment of the transmission lines, the calibration of the polarizer mirrors, and the power calibration.