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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.”
Sümer Şahin, Ali Erişen, Yalçin Çebi
Fusion Science and Technology | Volume 15 | Number 1 | January 1989 | Pages 37-48
Technical Paper | Blanket Engineering | doi.org/10.13182/FST89-A25322
Articles are hosted by Taylor and Francis Online.
A straightforward numerical graphical method is applied to achieve a flat fission power density (FPD) in a hybrid blanket by using a mixed fuel (ThO2 and natural UO2) with variable fractions of the fuel components in the radial direction. The neutronic analysis is carried out on a blanket with a hard neutron spectrum in the fissionable zone by simply omitting the moderating beryllium neutron multiplier. Mainly due to this precaution in the blanket design, the FPD could be kept quasi-constant over a relatively long plant lifetime. The peak-to-average FPD increased from 1.0704 at startup to only 1.1056 after an operation period of 24 months by a plant factor of 60% under a first-wall fusion neutron flux load of 1014 to 14 MeV·-n/cm2·s, corresponding to ∼2.25 MW/m2. Consequently, a hybrid blanket of the type used in this study would not require any fuel management scheme for at least 2 yr of plant operation.