1. Graduate School of Engineering, University of Fukui, Tsuruga, Japan
2. Research Institute of Nuclear Engineering, University of Fukui, Tsuruga, Japan
3. Institute for Materials Research, Tohoku University, Higashi-Ibaraki-gun, Japan
4. Research Institute for Material and Chemical Measurement, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
5. Material Sciences Research Center, Japan Atomic Energy Agency, Sayo, Japan
6. Sector of Fast Reactor and Advanced Reactor Research and Development, Japan Atomic Energy Agency, Higashi-Ibaraki-gun, Japan
7. Research Department Fuel Group, Nippon Nuclear Fuel Development Co. Ltd., Higashi-Ibaraki-gun, Japan