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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.”
Toshio Ida, Shunsuke Kondo, Yasumasa Togo
Fusion Science and Technology | Volume 6 | Number 1 | July 1984 | Pages 64-82
Technical Paper | Shielding | doi.org/10.13182/FST84-A23121
Articles are hosted by Taylor and Francis Online.
A numerical analysis program for radiation transport in axisymmetric toroidal geometry AIDA is developed using the method of direct integration (method of characteristics). The shape of the torus cross section is represented by coupled ellipses with different elongations. Several new techniques, such as a ray-tracing technique in the core plasma region and subdivision of angular mesh cells, are introduced to make the method well adapted to the neutronics analysis of a tokamak. These improvements are illustrated by sample toroidal geometry calculations. To verify the validity of the present program, results of analysis for two sample problems are compared with results of DOT-3.5 as well as those of Monte Carlo calculations. Agreement between the results of AIDA and those of DOT-3.5 becomes better as the quadrature approximation used in DOT-3.5 becomes higher. For the same accuracy, the AIDA code requires only about half as much running time as the DOT-3.5 code for a practical natural lithium blanket system.