1. Hitachi, Ltd., Hitachi Research Laboratory 4026 Kuji-cho, Hitachi-shi, Ibaraki-ken, 319-12 Japan
2. Hitachi, Ltd., Nuclear Power Generation Division 3-1-1 Saiwai-cho, Hitachi-shi, Ibaraki-ken, 317 Japan
3. The Chugoku Electric Power Company, Inc. Shimane Nuclear Power Station, 654-1 Kataku Kashima-cho, Yatsuka-gun, Shimane-ken, 690-03 Japan