1. Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, 1-4-1, Kagamiyama, Higashi-Hiroshima 739-8527, Japan
2. Fast Reactor Fuel Technology Research and Development Group, Japan Atomic Energy Agency, 4-33, Muramatsu, Tokai-Mura, Naka-Gun, Ibaraki 319-1194, Japan