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Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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.”
Don Steiner, Charles A. Flanagan
Fusion Science and Technology | Volume 3 | Number 1 | January 1983 | Pages 6-52
Overview | Fusion Reactor | doi.org/10.13182/FST83-A20816
Articles are hosted by Taylor and Francis Online.
During 1981, the Fusion Engineering Design Center developed a baseline design for the Fusion Engineering Device (FED) called for in the U.S. Magnetic Fusion Energy Engineering Act of 1980. The device has a major radius of 5.0 m with a plasma minor radius of 1.3 m elongated by 1.6. Capability is provided for operating the toroidal field (TF) coils up to 10 T, but the bulk of the operations are designed for 8 T. At 8-T conditions, the fusion power is ∼180 MW (neutron wall loading ∼0.4 MW/m2) and a plasma Q of ∼5 is expected. At 10-T conditions, which are expected to be limited to ∼10% of the total operations, the fusion power is ∼450 MW (∼1.0 MW/m2) and ignition is expected. Maintenance and cost were the key considerations in developing the design. The plasma chamber is assembled by inserting ten shield sectors into a spool support structure. Ten TF coils (7.4- × 10.9-m bore) are employed and produce a 3.6-T field (8 T) or 4.6-T field (10 T) on axis. Options for the TF coils include superfluid-cooled NbTi, subcooled NbTi, and a hybrid coil consisting of both NbTi and Nb3Sn. The poloidal coil system incorporates both normal copper coils (inside the TF coils) and superconducting NbTi coils (outside the TF coils). Plasma bulk heating is accomplished using 50 MW of ion cyclotron resonance heating. Electron cyclotron resonance heating is used for startup assist. A mechanical pumped limiter, located at the bottom of the plasma chamber, establishes the plasma edge and is used to pump hydrogen and helium particles. The first wall consists of water-cooled stainless steel panels complemented with passively cooled graphite armor on the top and inboard walls and on each side of the limiter. The inboard shield is 60 cm thick and the outboard shield is 120 cm thick. Feasible solutions were developed for each of the major systems and subsystems of this FED design. However, key design issues remain, and if resolved could improve the overall design. This design and the supporting basis constitute a departure point for the initiation of a full conceptual design effort.
