1. Nuclear Facilities Division, Taisei Corporation, 1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo 163-0606, Japan.
2. Taisei Advanced Center of Technology, Taisei Corporation, 344-1, Nase, Totsuka, Yokohama 245-0051, Japan.
3. Construction Project Group, Civil ∓ Architectural Engineering Dept., Shikoku Electric Power Co., Inc., 2-5, Marunouchi, Takamatsu-shi, Kagawa 760-8573, Japan.
4. Civil & Architectural Engineering Department, Nuclear Power Division, Chubu Electric Power Co., Inc., 1, Higashi-Shincho, Higashi-Ku, Nagoya 461-8680, Japan.