Structural safety features for superconducting magnets

A survey was carried out for various potential structural safety problems of superconducting fusion magnets. These areas include: (1) stresses due to inhomogeneous temperature distributions in magnets where normal regions have been initiated; (2) stress distributions and yield forces due to cracks and failed regions; (3) superconducting magnet response due to seismic excitation. These analyses were carried out using a variety of large capacity finite element computer codes that allow for the evaluation of stresses in elastic or elastic-plastic zones and around singularities in the magnet structure. Thus far, these analyses were carried out on UWMAK-I type magnet systems.