1. Nuclear Business Division Sumitomo Heavy Industries Yato, Nishitokyo, 188 JAPAN 81-424-68-4358
2. Tritium Engineering Laboratory, Japan Atomic Energy Research Institute (JAERI) Tokai, Ibaraki, 319-1195, JAPAN 81-29-282-6207
3. Department of Nuclear Engineering Nagoya University Nagoya, 464-8603, JAPAN 81-52-789-3783