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Nara, Yoshitaka*; Kuwatani, Ryuta*; Kono, Masanori*; Sato, Toshinori; Kashiwaya, Koki*
Zairyo, 67(7), p.730 - 737, 2018/07
Information of confining ability of rock is important for the geological disposal of radioactive wastes. To maintain or improve the confining ability of rocks, it is important to seal pores and cracks. In this study, we investigated the precipitation of minerals on the rock surface. As rock samples, we used Berea sandstone and Toki granite in this study. It was shown that precipitation occurred on the surface of rock specimens kept in calcium hydroxide solution for 1 month if the concentration was high. Specifically, if the concentration of calcium hydroxide solution was higher than 300 mg/l, the precipitation occurred obviously. After keeping rock specimens in calcium hydroxide solution, the weight of the rock samples increased and the concentration of calcium ion decreased by the precipitation. It is considered that the calcium ion in water was used for the precipitation on rock surfaces. Since the precipitation has been recognized for rock surfaces, it is possible to seal pores and cracks in rocks. Therefore, it is also possible to keep or decrease the permeability of rocks by the precipitation of calcium compounds.
Nemoto, Yoshiyuki; Miwa, Yukio; Tsuji, Hirokazu; Tsukada, Takashi
Dai-12-Kai MAGDA Konfarensu (Oita) Koen Rombunshu, p.191 - 196, 2003/00
Development and research about analytical method for the study of corrosion behavior of austenitic stainless steel after irradiation was conducted from the point of view for basic study of IASCC (Irradiation Assisted Stress Corrosion Cracking). Ion irradiations were conducted with several irradiation conditions these were irradiation temperature, radiation damage, the contents of helium (He) implantation. AFM (Atomic Force Microscope) was used to evaluate surface condition of irradiated specimens after corrosion procedure. Corrosion condition was developed to obtain good surface condition of irradiated specimens to evaluate corrosion behavior by AFM. It was succeeded and corrosion behavior at inside of grains and grain boundaries of irradiated specimens was obtained. EBSP (Electron Backscatter Diffraction Pattern) was used to evaluate relation of corrosion behavior with grain boundary character. Moreover, relations of corrosion behavior with irradiation condition were discussed.
Cu
O
during He-ion irradiation in an electron microscopeMaeta, Hiroshi; Furuno, Shigemi; Hojo, Kiichi; ; Watanabe, Mitsuo
Journal of Nuclear Materials, 179-181, p.1003 - 1006, 1991/00
Times Cited Count：0 Percentile：0.01(Materials Science, Multidisciplinary)no abstracts in English
; ; ;
Japanese Journal of Applied Physics, 25(12), p.L964 - L966, 1986/12
Times Cited Count：0 Percentile：0.01(Physics, Applied)no abstracts in English
; Kawanishi, Shuichi; ; Hagiwara, Miyuki
Journal of Materials Science Letters, 3, p.68 - 70, 1984/00
Times Cited Count：8 Percentile：50.26(Materials Science, Multidisciplinary)no abstracts in English
; Izui, Kazuhiko
Point Defects and Defect Interactions in Metals, p.705 - 707, 1982/00
no abstracts in English
Japanese Journal of Applied Physics, 19(5), p.799 - 806, 1980/00
Times Cited Count：3 Percentile：20.69(Physics, Applied)no abstracts in English
Zircaloy Chemical Reactions in NSRR Experiments; ;
JAERI-M 8267, 22 Pages, 1979/06
no abstracts in English
; Izui, Kazuhiko; ; ; *
Proc.5th Int.Conf.on High Voltage Electron Microscopy, p.301 - 304, 1977/08
no abstracts in English
; Ikawa, Katsuichi; ; Iwamoto, K.
Journal of Nuclear Materials, 56(2), p.243 - 245, 1975/02
Times Cited Count：5no abstracts in English
; Izui, Kazuhiko
JAERI-M 5441, 66 Pages, 1973/11
no abstracts in English
; ; Shiraishi, K.
Journal of Nuclear Materials, 48(3), p.365 - 368, 1973/03
Times Cited Count：7no abstracts in English
; ; ; *
Journal of the Physical Society of Japan, 30, 295 Pages, 1971/00
Times Cited Count：15no abstracts in English
