Thermal and Structural Analysis of the ITER ELM Coils
Authors: A.W. Brooks, Y. Zhai, E. Daly, M. Kalish, R. Pillsbury and A. Khodak
Abstract:
A thermal and structural analysis of the ELM Coil
design for ITER is presented. The ELM Coils are constructed
using a jacketed mineral insulated conductor of CuCrZr, MgO
and Inconel 625, rigidly mounted to the vacuum vessel inner
shell, behind the Blanket Modules. Since the coils are not
designed to be remotely maintained, a major issue is
demonstrating the structural integrity against fatigue and crack
propagation over an estimated 100 million cycles arising from
operation at 5 hz in a high magnetic field. The temperature rises
from ohmic and nuclear heating produce mean thermal stresses
that further limit the allowable alternating stresses. Thermal
growth also imparts large forces which must be reacted by the
Vacuum Vessel. This paper presents the analysis and results with
particular attention to the design criteria which is unique to the
In-Vessel Coils.
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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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