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Title: A Fast Shutdown Technique for Large Tokamaks

Abstract

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.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab., NJ (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
12204
Report Number(s):
PPPL-3356
AC02-CHO-3073; TRN: US0102374
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Sep 1999
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; TOKAMAK TYPE REACTORS; REACTOR SHUTDOWN; DEUTERIUM; KRYPTON; COMPUTERIZED SIMULATION; TFTR TOKAMAK

Citation Formats

E. Fredrickson, G.L. Schmidt, K. Hill, S.C. Jardin, and et al. A Fast Shutdown Technique for Large Tokamaks. United States: N. p., 1999. Web. doi:10.2172/12204.
E. Fredrickson, G.L. Schmidt, K. Hill, S.C. Jardin, & et al. A Fast Shutdown Technique for Large Tokamaks. United States. doi:10.2172/12204.
E. Fredrickson, G.L. Schmidt, K. Hill, S.C. Jardin, and et al. Wed . "A Fast Shutdown Technique for Large Tokamaks". United States. doi:10.2172/12204. https://www.osti.gov/servlets/purl/12204.
@article{osti_12204,
title = {A Fast Shutdown Technique for Large Tokamaks},
author = {E. Fredrickson and G.L. Schmidt and K. Hill and S.C. Jardin and et al},
abstractNote = {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.},
doi = {10.2172/12204},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Sep 01 00:00:00 EDT 1999},
month = {Wed Sep 01 00:00:00 EDT 1999}
}

Technical Report:

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