A Fast Shutdown Technique for Large Tokamaks

Technical Report · Wed Sep 01 00:00:00 EDT 1999

DOI:https://doi.org/10.2172/12204· OSTI ID:12204

Fredrickson, E; Schmidt, G L; Hill, K; Jardin, S C

A practical method is proposed for the fast shutdown of a large ignited tokamak. The method consists of injecting a rapid series of 30-50 deuterium pellets doped with a small ( 0.0005%) concentration of Krypton impurity, and simultaneously ramping the plasma current and shaping fields down over a period of several seconds using the poloidal field system. Detailed modeling with the Tokamak Simulation Code using a newly developed pellet mass deposition model shows that this method should terminate the discharge in a controlled and stable way without producing significant numbers of runaway electrons. A partial prototyping of this technique was accomplished in TFTR.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 12204
• Report Number(s): PPPL-3356; AC02-CHO-3073; TRN: US0102374
• Resource Relation: Other Information: PBD: 1 Sep 1999
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
TOKAMAK TYPE REACTORS
REACTOR SHUTDOWN
DEUTERIUM
KRYPTON
COMPUTERIZED SIMULATION
TFTR TOKAMAK