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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.”
J.H. Schultz, D.B. Montgomery
Fusion Science and Technology | Volume 4 | Number 2 | September 1983 | Pages 1019-1024
Next-Generation Devices | doi.org/10.13182/FST83-A22992
Articles are hosted by Taylor and Francis Online.
Alcator DCT is an experimental tokamak proposed to be built at M.I.T. It features extremely long pulses, RF heating and current drive, and an all superconducting magnet system. The toroidal magnets produce a field on-axis of 7 T, permitting current drive at high density and ion heating with existing power supplies. The device is designed to maximize the use of existing facilities at M.I.T. in order to build a machine large enough for simultaneous heating and current drive at low cost. This report concentrates on a design option with 24 circular toroidal field (TF) magnets, which represents the second iteration in the conceptual design of this machine. This design is a modification of the HESTER concept developed by the authors1, The DCT design is an advance over the HESTER design, in that it has adequate horizontal port space for human access and for tangential viewing of the plasma at the geometric center. This was achieved by decreasing the number of TF coils from 36 to 24. increasing the magnet bore from 52 to 62 em and shaving diagonals from noncritical areas of the case in the lead and header region. Recent perceptions of the requirements of the tokamak program in the areas of impurity control and in-vessel component screening indicate that a third significant iteration of the DCT concept is necessary. The Alcator DCT uses pumped limiters for long term impurity control. Doubts about the efficacy of pumped limiters and a desire to concentrate on long-term impurity control issues led to the recommendation that DCT be modified to include expanded boundary and simplified poloidal divertor operation. Early work on these options is described briefly.