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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.”
Géraldine Moll, Philippe Baclet, Michel Martin
Fusion Science and Technology | Volume 49 | Number 4 | May 2006 | Pages 574-580
Technical Paper | Target Fabrication | doi.org/10.13182/FST49-574
Articles are hosted by Taylor and Francis Online.
This paper is an update of the thermal and hydrodynamic simulations of cryogenic target for the laser MegaJoule (LMJ). Depending on the kind of study, 2-D axi-symmetric or 3-D models are used for those numerical simulations with FLUENT, a Computational Fluid Dynamics (CFD) code.Results show the response of the hohlraum assembly and the DT ice layer profile to sinusoidal modulation of the temperature of the cooling rings. aWe have also calculated that no change in the DT ice was observed with variations up to +/-2 mK on thermal shroud. Results of flux absorption during laser alignment are reported here.Taking in account the cavity real geometric configuration, the seven gas-areas cavity appears to be the most effective to counteract convection effects. Other ways to counteract those effects have been explored like heating modulation in the central area on the outer surface of the gold cavity, or uniform heating in this area with auxiliary heating on the lower cooling ring. More, the thermal response of DT ice when it is submitted to a quenching (in order to obtain the LMJ target gas density specification) is shown here.