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NRC approves transfer of Vallecitos to North Star for D&D
By an order dated April 25, the Nuclear Regulatory Commission has approved the transfer of ownership of Vallecitos Nuclear Center from GE Hitachi Nuclear Energy to NorthStar Group Services for nuclear decontamination, decommissioning, and environmental site restoration.
Jonathan W. Morrow-Jones*, Marc A. Firestone, Tak Kuen Mau
Fusion Science and Technology | Volume 32 | Number 4 | December 1997 | Pages 526-544
Technical Paper | Special Section: Plasma Control Issues for Tokamaks / Instrumentation Control and Data Handling | doi.org/10.13182/FST97-A19903
Articles are hosted by Taylor and Francis Online.
The modeling steps needed to create dynamically based automated control of tokamak plasmas are traced. This involves integrating models of current/magnetic-flux dynamics; plasma transport; plasma geometry; and source terms, such as lower hybrid, fast wave, and pellet-fueling deposition. Perturbative analysis of these models then yields the linear response of the tokamak to changes in coil voltages, applied radio-frequency power, or pellet-firing frequency. Comparison of the linear response models to nonlinear numerical calculations reveals that the plasma position and shape modeling will require future refinements.