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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.”
Antonio Soria, Vito Renda, Loris Papa, Franco Fenoglio
Fusion Science and Technology | Volume 16 | Number 4 | December 1989 | Pages 474-490
Technical Paper | Special Section: Cold Fusion Technical Notes / Safety/Environmental Aspect | doi.org/10.13182/FST89-A29110
Articles are hosted by Taylor and Francis Online.
Within the framework of safety analysis for the Next European Torus, a decay heat hazards assessment is under way at the Joint Research Centre at Ispra. Undercooling accidents [loss-of-coolant and loss-of-flow accidents (LOCAs and LOFAs)] due to pump failure have been investigated assuming an automatic plasma shutdown in both cases. The passive heat removal mechanisms considered include radiation between components and residual cooling by the thermosyphon effect in the main cooling circuits. Conservative thermohydraulic calculations have been made to determine coolant velocity and temperature transients to avoid water boiling in the circuits. Temperature transients in the whole reactor, coupling radiation and water cooling effects, have been assessed, taking into account the reciprocal influence of the different cooling circuits. Sensitivity studies have been performed to analyze some thermohydraulic parameters. Results show that during a LOFA, water boiling can be avoided provided that the water inertia is large enough, and material melting temperatures are not reached during a LOCA.