1. Japan Atomic Energy Research Institute, 801-1 Mukoyama, Naka-machi, Naka-gun, Ibaraki-ken, 311-0193 Japan
2. Japan Atomic Energy Research Institute, 2-2-2 Utisaiwaityo, Chiyoda-ku, Tokyo, 100-0011 Japan
3. Kawasaki Heavy Industries, LTD., 2-6-5 Minamisuna, Kouto-ku, Tokyo, 136-8588 Japan