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Title: Modeling an unmitigated quench event in an ITER torodial field magnet

Abstract

An unmitigated quench of a toroidal field (TF) magnet has been proposed as an extremely unlikely event for International Thermonuclear Experimental Reactor (ITER) Engineering Design Activity safety analysis. While the frequency of such an event is highly improbable (<1 x 10{sup {minus}6}/yr), the public safety consequences of this event must be explored because the TF magnets are located midway between the two primary confinement barriers of the ITER design. These confinement barriers are the vacuum vessel (VV) and the cryostat. An unmitigated quench has the potential for producing melting of the magnet. If molten material from the magnet were to impinge on the walls of the VV and cryostat, these walls could fail, resulting in a pathway for release of radioactive material to the environment from the VV. A model has been developed in the Idaho National Engineering and Environmental Laboratory called MAGARC to investigate the consequences of this accident. This model is described in detail, and results from this model used in ITER safety analysis are presented.

Authors:
Publication Date:
Research Org.:
Idaho National Engineering and Environmental Lab., Idaho Falls, ID (US)
Sponsoring Org.:
USDOE
OSTI Identifier:
20067766
DOE Contract Number:  
AC07-94ID13223
Resource Type:
Journal Article
Journal Name:
Fusion Technology
Additional Journal Information:
Journal Volume: 37; Journal Issue: 3; Other Information: PBD: May 2000; Journal ID: ISSN 0748-1896
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ITER TOKAMAK; ACCIDENTS; QUENCHING; SUPERCONDUCTING MAGNETS; SAFETY ANALYSIS; CRYOSTATS; VACUUM SYSTEMS; MATHEMATICAL MODELS

Citation Formats

Merrill, B.J. Modeling an unmitigated quench event in an ITER torodial field magnet. United States: N. p., 2000. Web.
Merrill, B.J. Modeling an unmitigated quench event in an ITER torodial field magnet. United States.
Merrill, B.J. Mon . "Modeling an unmitigated quench event in an ITER torodial field magnet". United States.
@article{osti_20067766,
title = {Modeling an unmitigated quench event in an ITER torodial field magnet},
author = {Merrill, B.J.},
abstractNote = {An unmitigated quench of a toroidal field (TF) magnet has been proposed as an extremely unlikely event for International Thermonuclear Experimental Reactor (ITER) Engineering Design Activity safety analysis. While the frequency of such an event is highly improbable (<1 x 10{sup {minus}6}/yr), the public safety consequences of this event must be explored because the TF magnets are located midway between the two primary confinement barriers of the ITER design. These confinement barriers are the vacuum vessel (VV) and the cryostat. An unmitigated quench has the potential for producing melting of the magnet. If molten material from the magnet were to impinge on the walls of the VV and cryostat, these walls could fail, resulting in a pathway for release of radioactive material to the environment from the VV. A model has been developed in the Idaho National Engineering and Environmental Laboratory called MAGARC to investigate the consequences of this accident. This model is described in detail, and results from this model used in ITER safety analysis are presented.},
doi = {},
journal = {Fusion Technology},
issn = {0748-1896},
number = 3,
volume = 37,
place = {United States},
year = {2000},
month = {5}
}