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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.”
M. Todosow, H. Ludewig, H. Takahashi, J. Powell
Fusion Science and Technology | Volume 20 | Number 4 | December 1991 | Pages 678-682
Accelerator/Reactor Waste Transmutation | doi.org/10.13182/FST91-A11946918
Articles are hosted by Taylor and Francis Online.
An initial assessment of several actinide/LLFP burner concepts based on the Particle Bed Reactor (PBR) is described. Core configurations consisting of 72-85 Pu fuelled “driver,” and ~42 actinide loaded “target” PBR fuel elements in a low temperature D2O, or beryllium carbide moderator/reflector are examined. Direct cooling of the HTGR BISO/TRISO type particles by radial flow of pressurized helium gas through the fuel bed allows high power densities (~5 MW/l), and high flux levels (~1.0E16 n/cm2-sec). As a result, up to ~50 % of the actinides in the target elements are burned in a postulated 20 day cycle.
The PBR based actinide burner concept possesses a number of safety and economic benefits relative to other reactor based transmutation approaches. These include a low inventory of radionuclides (~5% of that in a commercial LWR), and high integrity, coated fuel particles which can withstand extremely high temperatures, while still retaining virtually all fission products. This ensures large thermal margins under normal operating conditions, and minimizes the potential source term in postulated accidents. In addition, the pressure tube design and the possibility of on-line refueling offer further potential safety and economic advantages.