1. a University of Tokyo , Hango, Bunkyo-ku, Tokyo , 113
2. b Mitsubishi Heavy Ind., Ltd. , Arai-machi, Takasago-shi , 676
3. c Mitsubishi Atomic Power Ind., Inc. , Kitabukuro-cho, Omiya-shi , 330
4. d Toshiba Corp. , Shinsugita-machi, Isogo-ku, Yokohama , 235
5. e Hitachi, Ltd. , Moriyama-cho, Hitachi-shi , 316