1. Sumitomo Metal Mining Company, Ltd., Tokai Research Center 2600, Ishigamitojuku, Takai-Mura, Ibaraki-ken, 319-11, Japan
2. Power Reactor and Nuclear Fuel Development Corporation Tokai Works Reprocessing Plant, Analysis Section 4-33, Muramatu, Tokai-mura, Ibaraki-ken, 319-11, Japan