ITER vacuum vessel dynamic stress analysis of a disruption

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Dynamic stress analysis of the International Thermonuclear Experimental Reactor vacuum vessel loaded by disruption forces was performed. The deformation and stress results showed strong inertial effects when compared to static analyses. Maximum stress predicted dynamically was 300 MPa, but stress shown by static analysis from loads at the same point in time reached only 80 MPa. The analysis also provided a reaction load history in the vessel`s supports which is essential in evaluating support design. The disruption forces were estimated by assuming a 25-MA plasma current decaying at 1 MA/ms while moving vertically. In addition to forces developed within the ... continued below

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4 p.

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Riemer, B. W.; Conner, D. L.; Strickler, D. J. & Williamson, D. E. December 1994.

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Dynamic stress analysis of the International Thermonuclear Experimental Reactor vacuum vessel loaded by disruption forces was performed. The deformation and stress results showed strong inertial effects when compared to static analyses. Maximum stress predicted dynamically was 300 MPa, but stress shown by static analysis from loads at the same point in time reached only 80 MPa. The analysis also provided a reaction load history in the vessel`s supports which is essential in evaluating support design. The disruption forces were estimated by assuming a 25-MA plasma current decaying at 1 MA/ms while moving vertically. In addition to forces developed within the vessel, vertical loadings from the first wall/strong back assemblies and the divertor were applied to the vessel at their attachment points. The first 50 natural modes were also determined. The first mode`s frequency was 6.0 Hz, and its shape is characterized by vertical displacement of the vessel inner leg. The predicted deformation of the vessel appeared similar to its first mode shape combined with radial contraction. Kinetic energy history from the analysis also correlated with the first mode frequency.

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4 p.

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INIS; OSTI as DE96010002

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  • 18. European symposium on fusion technology (SOFT-18), Karlsruhe (Germany), 22-26 Aug 1994

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  • Other: DE96010002
  • Report No.: CONF-940843--21
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 234621
  • Archival Resource Key: ark:/67531/metadc672967

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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 1994

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  • June 29, 2015, 9:42 p.m.

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  • Jan. 25, 2016, 8:01 p.m.

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Riemer, B. W.; Conner, D. L.; Strickler, D. J. & Williamson, D. E. ITER vacuum vessel dynamic stress analysis of a disruption, article, December 1994; Tennessee. (digital.library.unt.edu/ark:/67531/metadc672967/: accessed July 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.