Axisymmetric Simulations of the ITER Vertical Stability Coil
Authors: Peter H. Titus, Han Zhang, Michael Kalish, Edward Daly
Abstract:
The ITER in-vessel coil system includes Vertical Stability (VS) coils
and Edge Localized Mode (ELM) coils. There are two large VS ring coils, one upper
and one lower. Each has four turns which are independently connected. The VS coils are
needed for successful operation of ITER for most all of its operating modes. The VS coils must be
highly reliable and fault tolerant. The operating environment includes normal and disruption Lorentz
forces. To parametrically address all these design conditions in a tractable analysis requires a
simplified model. The VS coils are predominately axisymmetric, and this suggests that an
axisymmetric model can be meaningfully used to address the variations in mechanical design,
loading, material properties, and time dependency. The axisymmetric finite element analysis
described in this paper includes simulations of the bolted frictional connections used for
the mounting details. Radiation and elastic-plastic response are modeled particularly for the
extreme faulted conditions. Thermal connectivity is varied to study the effects of partial
thermal connection of the actively cooled conductor to the remaining structure.
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Submitted to: SOFE 2013 Proeedings (June 0213) 25th Symposium on Fusion Engineering, San Francisdco, CA (June 10-14, 2013)
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Download PPPL-4925 (pdf 1.65 MB 6 pp)
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