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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.”
A.M. Hassanein
Fusion Science and Technology | Volume 15 | Number 2 | March 1989 | Pages 513-521
Plasma Engineering | doi.org/10.13182/FST89-A39751
Articles are hosted by Taylor and Francis Online.
Melting and vaporization of metallic reactor components such as the first wall and the limiter/divertor may be expected in fusion reactors due to the high energy deposition resulting from plasma instabilities occuring during both normal and off-normal operating conditions. Off-normal operating conditions result from plasma disruptions where the plasma loses confinement and dumps its energy on parts of reactor components. High heat flux may also result during normal operating conditions due to fluctuations in plasma edge conditions. The net erosion rates resulting from both melting and vaporization are very important in estimating the lifetime of such reactor components. Of particular significance is the stability and erosion of the resulting melt layer which directly impacts the total expected lifetime of the reactor. During the course of the disruption, the melt layer may be exposed to various forces such as electromagnetic, gravitational, plasma debris momentum, vapor recoil, surface tension and other forces. The loss of the melt layer during the disruption could have a serious impact on the required safe and economic operation of the reactor. A model is developed to describe the behavior of the melt layer during the time evolution of the disruption. The analysis is done parametrically for a range of disruption times, energy densities and various acting forces.