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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.”
Kenichi Kurihara
Fusion Science and Technology | Volume 22 | Number 3 | November 1992 | Pages 334-349
Technical Paper | Plasma Engineering | doi.org/10.13182/FST22-334-349
Articles are hosted by Taylor and Francis Online.
A method to identify the shape of tokamak plasmas with a Legendre-Fourier expansion of the vacuum poloidal flux function in toroidal coordinates is improved for the JT-60 Upgrade plasmas. These are pulse plasma discharges that have different sizes, positions, shapes, and internal quantities. The method is based on an analytical solution of the Grad-Shafranov equation in a vacuum region using toroidal coordinates. Although many identification methods previously proposed allow very small perturbations of certain parameters of the nominal plasma, the method presented here can relax the identification restriction on plasmas. Hence, it is applicable to accurate feedback control and real-time visualization of various plasma configurations.