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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.”
Lajos L. Lengyel
Fusion Science and Technology | Volume 10 | Number 3 | November 1986 | Pages 354-363
Technical Paper | Plasma Engineering | doi.org/10.13182/FST86-A24776
Articles are hosted by Taylor and Francis Online.
Results of ignition and continuous fueling scenario calculations are presented that were obtained in the framework of an assessment performed f or the Next European Torus based on International Tokamak Reactor (INTOR) parameters. The results obtained with pellet injection are compared with results corresponding to gas puffing. Pellet injection transports fresh fuel to the reaction zone on a time scale that is much shorter than the diffusion time characterizing the gas puffing method, thus making the method flexible and readily adaptable to different situations. In the case of ignition by pellet injection, it may become possible to have deep neutral beam penetration and maintain favorable heat deposition profiles up to the moment of density ramp-up, thus substantially relaxing beam output requirements. Three beam energies (D0particles) have been considered: 120, 100, and 80 keV. The importance of a proper match between beam characteristics and pellet parameters, specific for the transport scaling assumed (Alcator-INTOR), is shown. In the case of continuous fueling o f an already ignited discharge, the alpha power production notably increases if repetitive pellet injection, instead of gas puffing, is applied. The advantages of pellet injection are substantial, even at moderate pellet velocities.