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Shirai, Toshiyuki*; Tanabe, Mikio*; Soda, Hikaru*; Ikegami, Masahiro*; Fujimoto, Shinji*; Tongu, Hiromu*; Noda, Akira*; Noda, Koji*; Shibuya, Shinji*; Fujimoto, Tetsuya*; et al.
Proceedings of 9th Symposium on Accelerator and Related Technology for Application, p.19 - 22, 2007/06
Tachikawa, Hirokazu*; Kawakubo, Fumie*; Shimizu, Akihiko*; Shibata, Toshio*; Sugimoto, Katsuhisa*; Seo, Masahiro*; Tsuru, Toru*; Fujimoto, Shinji*; Inoue, Hiroyuki*
JAEA-Research 2006-058, 80 Pages, 2006/10
JAEA-Research-2006-058.pdf:10.86MB
The Japan Nuclear Cycle Development Institute submitted "Second Progress Report on Research and Development for the Geological Disposal of HLW in Japan" to the Japanese government. This report contains investigations of the corrosion life time of the overpack on the basis of experimental data and past research, assuming the ranging geological environment of Japan. However some subjects, such as the behavior of the overpack under high pH conditions and the behavior of the engineering barrier with change of near-field environmental condition with time for promoting reliability have still been left. To take into account these conditions, expert committee composed of metal corrosion science experts were established in the Nuclear Safety Research Association and past research outcomes and the theory of safety assessment were investigated from the view points of long term stability and corrosion resistance of engineering barrier.
Shibata, Toshio*; *; *; Tsuru, Toru*; Inoue, Hiroyuki*; *
JNC TJ8400 2002-060, 43 Pages, 2003/02
JNC-TJ8400-2002-060.pdf:1.58MB
It is essentially necessary to understand the effect of corrosion products on the corrosion rate of carbon steel in order to evaluate the lifetime of carbon steel overpack, Especially, effect of magnetite on the long term integrity of overpack is one of the important subjects to be solved, because some experimental results showed that the magnetite layer formed on a carbon steel overpack as a corrosion product would accelerates the corrosion rate of the overpack. Various studies have been conducted on the corrosion mechanism of carbon steel in the presence of magnetite, its effect on the overpack lifetime and the countermeasures against the corrosion acceleration. At present, however, the interpretations on the results of these studies are not always consistent each other. In this report, the current status of the studies on corrosion of carbon steel in the presence of magnetite was reviewed, and the unsolved problems and future research subjects were extracted and discussed.
Shibata, Toshio*; *; *; Tsuru, Toru*; Inoue, Hiroyuki*; *
JNC TJ8400 2002-059, 139 Pages, 2003/02
JNC-TJ8400-2002-059.pdf:7.07MB
A technical committee was organized in Japan Society of Corrosion Engineering (JSCE) to review and assess the study of overpack in JNC. The corrosion models for candidate materials for overpacks were developed in terms of corrosion science to contribute the selection of material, establishment of experimental methods and lifetime prediction of overpacks. It is expected that this report is used for the study of overpacks in the process of the research and development of high-level radioactive waste disposal.
Shibata, Toshio*; Haruna, Takumi*; Fujimoto, Shinji*; Zhang, S.*
JAERI-Tech 2000-061, 38 Pages, 2000/09
JAERI-Tech-2000-061.pdf:10.98MB
no abstracts in English
Nishioka, Tsuyoshi*; Ogawa, Soma*; Tsuchiya, Hiroaki*; Fujimoto, Shinji*; Taniguchi, Naoki; Dobashi, Ryuta*
no journal, ,
no abstracts in English
Nishioka, Tsuyoshi*; Tsuchiya, Hiroaki*; Fujimoto, Shinji*; Tachikawa, Hirokazu*; Taniguchi, Naoki
no journal, ,
no abstracts in English