Safety analysis results for cryostat ingress accidents in ITER

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Accidents involving the ingress of air or water into the cryostat of the International Thermonuclear Experimental Reactor (ITER) tokamak design have been analyzed with a modified version of the MELCOR code for the ITER Non-site Specific Safety Report (NSSR-1). The air ingress accident is the result of a postulated breach of the cryostat boundary into an adjoining room. MELCOR results for this accident demonstrate that the condensed air mass and increased heat loads are not a magnet safety concern, but that the partial vacuum in the adjoining room must be accommodated in the building design. The water ingress accident is ... continued below

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8 p.

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Merrill, B.J.; Cadwallader, L.C. & Petti, D.A. December 31, 1996.

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Description

Accidents involving the ingress of air or water into the cryostat of the International Thermonuclear Experimental Reactor (ITER) tokamak design have been analyzed with a modified version of the MELCOR code for the ITER Non-site Specific Safety Report (NSSR-1). The air ingress accident is the result of a postulated breach of the cryostat boundary into an adjoining room. MELCOR results for this accident demonstrate that the condensed air mass and increased heat loads are not a magnet safety concern, but that the partial vacuum in the adjoining room must be accommodated in the building design. The water ingress accident is the result of a postulated magnet arc that results in melting of a Primary Heat Transport System (PHTS) coolant pipe, discharging PHTS water and PHTS water activated corrosion products and HTO into the cryostat. MELCOR results for this accident demonstrate that the condensed water mass and increased heat loads are not a magnet safety concern, that the cryostat pressure remains below design limits, and that the corrosion product and HTO releases are well within the ITER release limits.

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8 p.

Notes

INIS; OSTI as DE97050812

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  • 6. IAEA technical committee meeting on developments in fusion safety, Naka (Japan), 21-25 Oct 1996

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  • Other: DE97050812
  • Report No.: INEL--96/00299
  • Report No.: CONF-9610240--1
  • Grant Number: AC07-94ID13223
  • Office of Scientific & Technical Information Report Number: 438997
  • Archival Resource Key: ark:/67531/metadc686023

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • December 31, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Nov. 5, 2015, 3:15 p.m.

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Merrill, B.J.; Cadwallader, L.C. & Petti, D.A. Safety analysis results for cryostat ingress accidents in ITER, article, December 31, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc686023/: accessed January 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.