1. Dep. of Chemistry, Faculty of Science; Kyushu University; 33, Hakozaki, Higashi-ku Fukuoka 812-81 Japan
2. Nippon Steel Corp.; 1, Oaza Nishinosu Oita 870 Japan
3. Power Reactor & Nuclear Fuel Development Corp.; 4002, Oarai Ibaraki 311-13 Japan
4. Kyushu Environmental Evaluation Assoc.; 1-10-1, Matsukadai, Higashi-ku Fukuoka 813 Japan
5. Research Lab., Kyushu Electric Power Co., Inc.; Shimobaru, Minami-ku Fukuoka 815 Japan