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Yamamoto, Sekika*; Ishibashi, Yasuhiko*; Inamura, Yasuhiro; Katayama, Yoshinori; Mishina, Tomobumi*; Nakahara, Junichiro*
Journal of Chemical Physics, 124(14), p.144511_1 - 144511_5, 2006/04
Times Cited Count：12 Percentile：38.37(Chemistry, Physical)High pressure X-ray diffraction measurements on liquid carbon disulfide up to 1.2 GPa are performed by using an energy dispersion method. The results are compared with a molecular dynamics calculation with usual Lennard-Jones potential. They give very good agreement for all pressures measured. It becomes clear that the liquid structure changes like hard core liquid up to the pressure just below crystallizing point. The relation between structural change and optical response at high pressure is discussed.
Tsukada, Takashi; Yamamoto, Masahiro; Miwa, Yukio; Kato, Chiaki; Nakano, Junichi; Nakahara, Yukio; Sato, Tomonori; Uchida, Shunsuke
no journal, ,
In order to develop a technical basis necessary to improve the assessment technique of SCC, in this research, the influence of water radiolysis and irradiation dose rate on SCC behavior were studied which was indispensable to understand SCC behavior in actual power plants. In addition, the present status of SCC assessment techniques were summarized and analyzed systematically, and the present issue to improve the techniques was extracted.
Tsukada, Takashi; Yamamoto, Masahiro; Kato, Chiaki; Nakano, Junichi; Nakahara, Yukio; Sato, Tomonori; Ugachi, Hirokazu; Kondo, Keietsu
no journal, ,
no abstracts in English
Yamada, Nobuto; Matsuoka, Toshiyuki; Ishigaki, Koichi*; Kanazawa, Yohei*; Tokuyasu, Shingo*; Nakahara, Junichi*
no journal, ,
Evaluation on the geological discontinuity is one of the important issues for safety assessment of high-level radioactive waste disposal. A Reverse Vertical Seismic Profiling (RVSP) investigation using blasting vibration for excavation of the research gallery and survey lines placed in the -300m research galleries of the Mizunami Underground Research Laboratory has been carried out to obtain three-dimensional information on the geological discontinuity such as faults and fracture zones in granite during the research galleries excavation works. In this study, results of RVSP are compared with existing information such as sonic logging to estimate spatial distribution of faults and fracture zones, and the applicability of this method to estimate geological structure in the granite is discussed.
