In order to prevent generating secondary radioactive waste during works in a closed environment contaminated with radioactive substances, we developed a new protective garment system in collaboration with Chiyoda Maintenance Co., Ltd. It is realized by developing a new put-on/take-off mechanism based on reversible shape-changing structures composed of shape memory alloy and elastic materials. Isolation with pollution environment and clean environment is always maintained and anti-contamination smocks, which turn into secondary waste after works, are not necessary any longer.

The system is applicable to works in an environment handling hazardous substances as well as in a clean room.