Disruption Analysis and Response Implicattions of Passive Plates for the NSTX Upgrade
Authors: Yuhu Zhai, Peter Titus, Art Brooks, and Ron Hatcher
Abstract: The NSTX upgrade project requires analysis
qualifications of existing vacuum vessel and passive
stabilizing plates for increased plasma performance.
Vertical stability is critically dependent on the passive
conducting structure that surrounds the plasma. In this
paper, the passive conducting structure is analyzed for
the upgrade condition during plasma disruption to ensure
the level of stress in the stabilizing plates and the fastener
is within its design limits. The counter-bore of the passive
plates for bolting is evaluated in details and counter-bore
bushing is redesigned to prevent shear failure during
disruptions as a result of high pulling and pushing forces,
particularly for support at the corner bolts.
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Submitted to: Fusion Science and Technology, (August 2012) Conference 20th ANS Topical Meeting on the Technology for Fusion, Nashville, TN Aug 27-31, 2012
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Download PPPL-4798 (pdf 953 KB 5pp)
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