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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.”
M. Kwon, J. G. Bak, K. Choh, J. H. Choi, J. W. Choi, A. C. England, K. Hagisawa, J. S. Hong, S. J. Jeon, H. G. Jhang, Y. S. Jung, B. C. Kim, J. Y. Kim, S. S. Kim, W. H. Ko, M. C. Kyum, S. G. Lee, T. Lho, H. K. Na, B. H. Park, D. C. Seo, H. L. Yang, J. H. Yeom, S. J. Yoo, Hanbit Team
Fusion Science and Technology | Volume 43 | Number 1 | January 2003 | Pages 23-29
Overview | doi.org/10.13182/FST03-A11963558
Articles are hosted by Taylor and Francis Online.
The HANBIT device is a non axi-symmetric mirror being operated as a national users’ facility. Plasmas are routinely produced by ICRF at 3.5 MHz with a slot antenna with gas puffing and the line-integrated densities are in the range between 2×1012 and 1×1014 cm–2. The pulse length is normally 250 msec, but higher wall recycling happened usually after 100 msec into the discharge. Characterization and application of various methods of wall conditioning have been performed. Ion heating had been tried by RF with a double half-turn antenna, however, the heating effects were vaguely seen. Optimum heating schemes have been actively pursued with different heating method and antenna types. RF-induced electric fields have been known to affect the plasma stability. This effect of RF on stability seems important in HANBIT because of lacking of stabilizing mechanisms such as the minimum-B effect and the line-tying effect. In addition, stabilization by a hot electron ring generation and by other methods is being pursued. Detailed experimental results on these topics will be presented.