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Modernizing I&C for operations and maintenance, one phase at a time
The two reactors at Dominion Energy’s Surry plant are among the oldest in the U.S. nuclear fleet. Yet when the plant celebrated its 50th anniversary in 2023, staff could raise a toast to the future. Surry was one of the first plants to file a subsequent license renewal (SLR) application, and in May 2021, it became official: the plant was licensed to operate for a full 80 years, extending its reactors’ lifespans into 2052 and 2053.
A. C. England, D. K. Lee, S. G. Lee, M. Kwon, S. W. Yoon, Hanbit Team (19R03)
Fusion Science and Technology | Volume 51 | Number 2 | February 2007 | Pages 118-121
Technical Paper | Open Magnetic Systems for Plasma Confinement | doi.org/10.13182/FST07-A1329
Articles are hosted by Taylor and Francis Online.
The Hanbit magnetic mirror has a central cell, one anchor cell and one plug cell plus associated vacuum chambers. The Hanbit device has been involved in a series of experiments on stabilization of the MHD flute type mode. Earlier work showed that it was possible to stabilize the m = -1 flute type MHD instability with RF power near the cyclotron resonance by the sideband coupling process. Divertors were used previously in experiments on the TARA mirror device and the HIEI mirror device. According to Pastukhov the main stabilizing effect is compressibility. The present configuration uses just one divertor coil in one end of Hanbit and produces a left-right asymmetry in the magnetic field. One of the central cell coils with reversed current is used as the divertor coil and two adjacent coils with increased current are used to compensate for the field droop and to prevent the field lines from intercepting the bare ion cyclotron resonant heating (ICRH) antenna. The divertor strongly reduces the m=-1 instability when the null point (x-point) is sufficiently inside the vacuum tank. However, the diverted plasma is directed into a wall and the divertor cannot be used to eliminate impurities.