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The Mission of the Robotics and Remote Systems Division is to promote the development and application of immersive simulation, robotics, and remote systems for hazardous environments for the purpose of reducing hazardous exposure to individuals, reducing environmental hazards and reducing the cost of performing work.
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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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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 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. 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.”
A. D. Beklemishev
Fusion Science and Technology | Volume 59 | Number 1 | January 2011 | Pages 90-93
doi.org/10.13182/FST11-A11581
Articles are hosted by Taylor and Francis Online.
Feedback control is routinely used in modern plasma traps for adjusting plasma equilibrium on the transport time scale. Some intrinsic properties of magnetic mirrors make it possible to employ feedback control for stabilization of flute modes as well. Purely electromagnetic plasma-control system that is independent of line-tying or plasma conductivity to the end-plates is proposed. The system adds transverse flexibility to the plasma column, so that any growing perturbation can be deformed to become anti-ballooning. Anti-ballooning form means reduced flute amplitude in bad-curvature regions and enhanced amplitude in expanders or other traditional stabilizers, so that energy of the perturbation becomes positive and the mode is suppressed. Detailed analysis shows that transverse flexibility (or tail-waving) of the discharge can be employed for feedback stabilization even without good-curvature regions. The only requirement is that the discharge inertia (field-weighted plasma density) and the pressure-weighted field curvature are differently distributed along the discharge. If based on inertia, the stabilization mechanism resembles the rope-walker act. Estimates show that the power cost of such stabilization is reasonable and scales inversely with the trap length.