ABSTRACT:A super radiation-resistant motor was developed for a project of ITER, in which the insulation materials consist of high radiation-durable organic materials such as poly(benz-imidazole) (PBI), poly(arylate) (VECRUS Ò , VECTRA Ò ), and poly(phenyl-ether/urea) grease. The motor was tested by -rays irradiation for 2 years under power supply, and confirmed to have high radiation resistance over 100 MGy, which is 50 times higher than an ordinary radiation durable motor for a nuclear power station. The key technology was the selection of radiation resistant polymers and further improvement of radiation resistance by mixing aluminum (Al) micro-flakes in organic polymers. The effects of Al flake to prevent radiation degradation of polymer were assumed to be channeling of secondary electron induced by -ray irradiation.

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