1. Nippon Atomic Industry Group Co., Ltd.NAIG Nuclear Research Laboratory, 4-1, Ukishima-cho Kawasaki-ku, Kawasaki, 210 Japan
2. Toshiba Corporation, 8 Shinsugita-cho Isogo-ku, Yokohama, 235 Japan
3. General Electric Company, 175 Curtner Avenue San Jose, California, 95125
4. Ansaldo, Divisione NIRA Via Dei Pascatori 35, 16123 Genova, Italy