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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.”
V. Erckmann, The Wendelstein VII-AS Team, W. Kasparek, G. A. Müller, P. G. Schüller, M. Thumm
Fusion Science and Technology | Volume 17 | Number 1 | January 1990 | Pages 76-85
Technical Paper | Stellarator System | doi.org/10.13182/FST90-A29172
Articles are hosted by Taylor and Francis Online.
A 70-GHz electron cyclotron resonance heating (ECRH) system (4 × 0.2 MW for 3 s and 0.2 MW for 0.1 s) has been installed on the Wendelstein VII-AS stellarator for plasma buildup, heating, and current drive. Five commercially available gyrotrons, each delivering 0.2-MW radio-frequency (rf) output power, serve as the ECRH sources. The microwaves are transmitted to the stellarator by conventional oversized waveguides, and they convert the gyrotron output mode to a linearly polarized Gaussian free-space mode, which is launched to the plasma at arbitrary poloidal and toroidal angles by a quasi-optical launcher. The transmission line and launching system as well as the related rf diagnostics are discussed in detail. Experimental results on heating and current drive obtained with various kinds of microwave launching are presented.