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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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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.”
Toyoaki Kimura, Kenichi Kurihara, Youichi Kawamata, Kenichi Akiba, Minoru Takahashi, Tsunehisa Terakado, Ryuji Yoshino
Fusion Science and Technology | Volume 32 | Number 3 | November 1997 | Pages 404-415
Technical Paper | Plasma Control Issues for Tokamaks | doi.org/10.13182/FST97-A4
Articles are hosted by Taylor and Francis Online.
A review on the plasma position and current control system for the JT-60 upgrade is presented. In the control system, advanced digital technologies such as the versa module Europe bus, the computer automated measurement and control technology, and Ethernet are applied to fast equilibrium control of the vertically elongated divertor plasmas. The delay of the overall feedback loop with a sampling period of 0.25 ms is <1.3 ms, including the delay of the power supply for the horizontal field coil. Multivariable control with matrix gain has been adopted in the system for decoupling control of the equilibrium parameters such as the plasma current and the horizontal position. The idea of an "algorithm number preprogram" was newly introduced into the control system for more flexible control. This made it possible to dynamically switch the control algorithms at any time of plasma pulse discharge. Several experiences in plasma control are presented. The development of a real-time plasma shape visualization system for advanced monitoring and control is also described.