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Kamiya, Tomohiro; Yoshida, Hiroyuki
Proceedings of the Symposium on Shock Waves in Japan (Internet), 7 Pages, 2024/03
We developed a ghost fluid method satisfying conservation laws to simulate steam explosions that can occur at the accident of a nuclear power plant. In the developed method, a first-order approximation is applied to interface effect regions, and a high-order approximation is applied to bulk regions. In other words, the algorithm of the developed method is not consistent. Therefore, we modify the way of getting ghost fluids and propose a comprehensive algorithm that applies a high-order approximation to interface effect regions. In the presentation, we will report the outlines and results of the numerical tests of it.
Harjo, S.
Kensa Gijutsu, 26(9), p.9 - 13, 2021/09
no abstracts in English
Zn
Y
during compression and tensionHarjo, S.; Aizawa, Kazuya; Gong, W.*; Kawasaki, Takuro
Materials Transactions, 61(5), p.828 - 832, 2020/04
Times Cited Count：6 Percentile：36.45(Materials Science, Multidisciplinary)Lam, T.-N.*; Chou, Y.-S.*; Chang, Y.-J.*; Sui, T.-R.*; Yeh, A.-C.*; Harjo, S.; Lee, S. Y.*; Jain, J.*; Lai, B.-H.*; Huang, E.-W.*
Crystals (Internet), 9(8), p.420_1 - 420_8, 2019/08
Times Cited Count：9 Percentile：67.37(Crystallography)Uesawa, Shinichiro; Horiguchi, Naoki; Shibata, Mitsuhiko; Yoshida, Hiroyuki
Nihon Kikai Gakkai Rombunshu (Internet), 84(859), p.17-00392_1 - 17-00392_10, 2018/03
no abstracts in English
Fukuda, Kojiro*; Tomota, Yo*; Harjo, S.; Gong, W.*; Woo, W.*; Seong, B. S.*; Kuwahara, Yoshitaka*; Ikuta, Fumiaki*
Materials Science and Technology, 33(2), p.172 - 180, 2017/01
Times Cited Count：1 Percentile：5.53(Materials Science, Multidisciplinary)Okada, Shota; Izumo, Sari; Nakata, Hisakazu; Tsuji, Tomoyuki; Sakai, Akihiro; Amazawa, Hiroya
JAEA-Technology 2016-023, 129 Pages, 2016/11
JAEA-Technology-2016-023.pdf:8.95MB
Waste packages must meet the technical requirements. This is because JAEA has been preparing an operating procedure manual for quality control of radioactive waste disposal to be applied to the processing of the waste packages. Raw wastes generated by JAEA are segregated and stored by a method specified in the manual. The composition of raw wastes was characterized on the basis of records of the segregation process. Simulated waste packages were produced by placing the waste materials in a 200 liter drum, which was then filled with mortar, followed by curing in a controlled manner. The static load test was conducted to measure deformation and strain performance of the simulated waste package. Compression apparatuses which can imitate loading conditions in pit-type and trench-type facility that are planned by JAEA were used. Based on the test result, waste packages produced in accordance with the manual met the technical requirement under the condition.
Aoyagi, Kazuhei; Ishii, Eiichi; Kondo, Keiji*; Tsusaka, Kimikazu*; Fujita, Tomoo
JAEA-Research 2015-001, 46 Pages, 2015/03
JAEA-Research-2015-001.pdf:4.92MB
JAEA-Research-2015-001-appendix(CD-ROM).zip:67.95MB
Japan Atomic Energy Agency (JAEA) has been conducting R&D activities at the off-site URL at Horonobe, Hokkaido, Japan in order to enhance reliability of technology related to deep geological disposal of HLW in sedimentary rocks. In this report, strength properties (cohesion and frictional angle) of rock masses in the Koetoi and Wakkanai formations are investigated on the basis of triaxial tests conducted in the Horonobe URL considering the relative depths to the formation. Strength properties investigated in this report are compared with the properties obtained in the designing phase. The cohesion in the Koetoi Formation increased with increasing depth. On the other hand, in the transition zone of the Wakkanai Formation, the cohesion increased significantly in the shallow Wakkanai formation (transition zone). Below the transition zone, the cohesion does not significantly depend on the depth. Thus the strength properties between two formations were found to be different. Comparing the cohesions and frictional angles determined from triaxial tests with the values determined in the designing phase, there was no agreement between these values in almost all the depth. Thus it is essential to determine cohesion and frictional angle considering the relative depths to the formation for detailed understanding of strength properties of rock mass.
Tsuchiya, Katsuhiko; Kizu, Kaname; Takahashi, Hiroyuki*; Ando, Toshinari*; Matsukawa, Makoto; Tamai, Hiroshi
IEEE Transactions on Applied Superconductivity, 16(2), p.922 - 925, 2006/06
Times Cited Count：1 Percentile：11.94(Engineering, Electrical & Electronic)no abstracts in English
Hagiwara, Shigeru*; Sakamoto, Yoshiaki*; Takebe, Shinichi; Nakayama, Shinichi
JAERI-Data/Code 2004-004, 167 Pages, 2004/03
JAERI-Data-Code-2004-004.pdf:10.14MB
no abstracts in English
Ti/(Be) and BeV/(Be) two-phase alloysMishima, Yoshinao*; Yamamoto, Keisuke*; Kimura, Yoshisato*; Uchida, Munenori*; Kawamura, Hiroshi
JAERI-Conf 2004-006, p.184 - 189, 2004/03
no abstracts in English
Takada, Shoji; Takizuka, Takakazu; Kunitomi, Kazuhiko; Kosugiyama, Shinichi; Yan, X.; Matsumoto, Iwao*
Nihon Genshiryoku Gakkai Wabun Rombunshi, 2(4), p.525 - 531, 2003/12
no abstracts in English
) and CaCO crystalsDeki, Kyoichi*; Matsuoka, Fumiaki*; Tei, Kazuyoku*; Arisawa, Takashi
Reza Kenkyu, 31(12), p.854 - 859, 2003/12
no abstracts in English
Takada, Shoji; Takizuka, Takakazu; Kunitomi, Kazuhiko; Yan, X.; Tanihira, Masanori*; Itaka, Hidehiko*; Mori, Eiji*
Nihon Genshiryoku Gakkai Wabun Rombunshi, 2(3), p.291 - 300, 2003/09
no abstracts in English
Takada, Shoji; Takizuka, Takakazu; Kunitomi, Kazuhiko; Yan, X.; Minatsuki, Isao*
Dai-31-Kai Gasu Tabin Teiki Koenkai Rombunshu, p.55 - 60, 2003/06
no abstracts in English
Takada, Shoji; Takizuka, Takakazu; Kunitomi, Kazuhiko; Yan, X.; Katanishi, Shoji; Kosugiyama, Shinichi; Minatsuki, Isao*; Miyoshi, Yasuyuki*
Nihon Genshiryoku Gakkai Wabun Rombunshi, 1(4), p.341 - 351, 2002/12
no abstracts in English
Kosugiyama, Shinichi; Takada, Shoji; Katanishi, Shoji; Yan, X.; Takizuka, Takakazu; Kunitomi, Kazuhiko
JAERI-Tech 2002-088, 70 Pages, 2002/11
JAERI-Tech-2002-088.pdf:5.21MB
no abstracts in English
Suzuki, Satoru; Sato, Haruo; Ishidera, Takamitsu; Fujii, Naoki*; Kawamura, Katsuyuki*
JNC TN8400 2001-031, 44 Pages, 2002/05
JNC-TN8400-2001-031.pdf:1.58MB
In order to quantify effect of temperature on diffusivity of deuterated water (HDO) in compacted sodium-bentonite, through-diffusion experiments were conducted at elevated tempemture from 298 to 333 K. Kunipia F (Na-montmorillonite content 
98 wt. %; Kunimine Industly Co.) was compacted to a dry density of 0.9 and l.35 Mg/m
. Since smectite flakes were perpendicularly oriented to a direction of compaction, anisotropy of diffusivity was investigated parallel and normal to the preferred orientation of smectite. Effective diffusion coeficient D
of HDO was larger for a diffusional direction parallel to the preferred orientation than normal to that for both dry densities. These results well agreed to the previously reported ones for tritiated water. Activation energies of D in compacted bentonite increased with increasing dry density in the range of 19 - 25 kJ/mol which was slightly larger than that in bulk water (18 kJ/mol). This relationship can be considered to be due to both the pore structure development and high activation energy of water (18-23 kJ/mol) in the vicinity of smectite surface (within 2 nm) on the basis of molecular dynamics simulations.
Sugita, Yutaka; Yui, Mikazu
JNC TN8450 2001-007, 16 Pages, 2002/02
JNC-TN8450-2001-007.pdf:0.78MB
This report summary the dataset of the relationship between unconfined compressive strength and tensile strength of the rock mass described in supporting report 2; repository design and engineering technology of second progress report (H12 report) on research and development for the geological disposal of HLW in Japan.
Matsumoto, Taro; Tokuda, Shinji; Kishimoto, Yasuaki; Naito, Hiroshi*
Journal of Plasma and Fusion Research SERIES, Vol.5, p.523 - 526, 2002/00
no abstracts in English
