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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. Murakami, E.F. Jaeger, R. Majeski, C.K. Phillips, D.A. Rasmussen, J.H. Rogers, G. Schilling, J.E Stevens, G. Taylor, C.Y. Wang, J.R. Wilson, D.B. Batchelor, M.G. Bell, R.V. Budny, C.E. Bush, N.L. Bretz, D. Darrow, A.C. England, E. Fredrickson, R. Goldfinger, G. Hammett, G.R. Hanson, J.C. Hosea, H.K. Park, S.D. Scott, E. Synakowski, R.M. Wieland, J.B. Wilgen, M.C. Zarnstorff
Fusion Science and Technology | Volume 27 | Number 3 | April 1995 | Pages 131-137
Overview Paper | doi.org/10.13182/FST95-A11947057
Articles are hosted by Taylor and Francis Online.
This paper describes results of the first experiments utilizing high-power ion cyclotron range of frequency (ICRF) to heat deuterium-tritium (D-T) plasmas in reactor-relevant regimes on the Tokamak Fusion Test Reactor (TFTR). Results from these experiments have demonstrated efficient core, second harmonic, tritium heating of D-T supershot plasmas with tritium concentrations ranging from 6%-40%. Significant direct ion heating on the order of 60% of the input radio frequency (rf) power has been observed. The measured deposition profiles are in good agreement with two-dimensional modeling code predictions. Energy confinement in an rf-heated supershot is at least similar to that without rf, and possibly better in the electron channel. Efficient electron heating via mode conversion of fast waves to ion Bernstein waves (IBW) has been demonstrated in ohmic, deuterium-deuterium and DT-neutral beam injection plasmas with high concentrations of minority 3He (n3He/ne = 15% - 30%). By changing the 3He concentration or the toroidal field strength, the location of the mode-conversion radius was varied. The power deposition profile measured with rf power modulation indicated that up to 70% of the power can be deposited on electrons at an off-axis position. Preliminary results with up to 4 MW coupled into the plasma by 90-degree phased antennas showed directional propagation of the mode-converted IBW. Analysis of heat wave propagation showed no strong inward thermal pinch in off-axis heating of an ohmically-heated target plasma in TFTR.