1. Graduate school of Environmental Studies, Nagoya University, ES-building no. 539, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8603 Japan.
2. Nuclear Civil & Architectural Engineering Dept., Chubu Electric Power Co., Inc., 1, Toshin-cho, Higashi-ku, Nagoya, Aichi, 461-8680, Japan.
3. Nuclear Safety Research & Development Center, Chubu Electric Power Co., Inc., 5561, Sakura, Omaezaki, Shizuoka, Japan.
4. Nuclear Power Department, Kajima Corporation.