Research Laboratory for Nuclear Reactors;
Tokyo Institute of Technology;
2-12-1-N1-34 O-okayama;
Meguro-ku;
Tokyo 152-8550;
Japan;
Department of Materials Science;
Shibaura Institute of Technology;
3-7-5 Toyosu;
Koto-ku;
Tokyo 135-8548;
Japan;
Department of Materials and Life Science;
Seikei University;
3-3-1 Kichijoji-Kitamachi;
Musashino-shi;
Tokyo 180-8633;
Japan;