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Fusion Science and Technology
Latest News
Savannah River marks the closure of another legacy waste tank
The Department of Energy’s Office of Environmental Management has received concurrence from regulators that Tank 14 at the Savannah River Site has reached preliminary cease waste removal (PCWR) status after radioactive liquid waste was successfully removed from the tank. PCWR is a regulatory milestone in the closure of SRS’s old-style waste tanks, which were built in the 1950s to store waste generated by the chemical separations of plutonium and uranium.
Wayne A. Houlberg, James T. Lacatski, Nermin A. Uckan
Fusion Science and Technology | Volume 10 | Number 2 | September 1986 | Pages 227-235
Technical Paper | Fusion Reactor | doi.org/10.13182/FST86-A24974
Articles are hosted by Taylor and Francis Online.
Confinement and engineering issues of a small (average minor radius ā ≃ 1 m) moderate-aspect-ratio torsatron reactor are evaluated. The Advanced Toroidal Facility design is used as a starting point because of its relatively low aspect ratio and high beta capabilities. The major limitation of the compact size is the lack of space under the helical coils for the blanket and shield. Some combination of lower aspect ratio coils, higher coil current density, thinner coils, and more effective shielding material under the coils should be incorporated into future designs to improve the feasibility of small torsatron reactor concepts. Current neoclassical confinement models for helically trapped particles show that a large radial electric field (in terms of the electric potential, eφ/T ≥ 3) is necessary to achieve ignition in a device of this size.