1. Japan Atomic Energy Research Institute Tokai-mura, Naka-gun, Ibaraki-ken 319-11 Japan (292)82-6075
2. Toyo Engineering Corp. 8-1,2-Chome, Akanehama, Chiba-ken 275, Japan (474)54-1508
3. Japan Atomic Energy Research Institute Tokai-mura, Naka-gun, Ibaraki-ken 319-11 Japan (292)82-6074