*Hikaru Miura¹, Yuichi Kurihara², Masayoshi Yamamoto³, Aya Sakaguchi⁴, Kazuya Tanaka², Shogo Higaki⁵, Yoshio Takahashi⁵ (1.Central Research Institute of Electric Power Industry, 2.JAEA, 3.University of Kanazawa, 4.University of Tsukuba, 5.The University of Tokyo)