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Yamada, Katsunori; Fujii, Katsutoshi; Kanda, Hiroshi; Higashi, Daisuke; Kobayashi, Toshiaki; Nakagawa, Masahiro; Fukami, Tomoyo; Yoshida, Keisuke; Ueno, Yumi; Nakajima, Junya; et al.
JAEA-Review 2013-033, 51 Pages, 2013/12
JAEA-Review-2013-033.pdf:2.73MB
After the accident at Fukushima Dai-ichi Nuclear Power Plant, various numerical criteria relevant to radiation protection were defined. We surveyed these criteria through internet. As a result of survey, the following 13 items were identified: (1) criteria for taking stable iodine tablets, (2) criteria for the screening of surface contamination, (3) evacuation area, sheltering area, etc., (4) activity concentrations in food, drinking water, etc., (5) dose limit for radiation workers engaged in emergency work, (6) guideline levels of radioactive substances in bathing areas, (7) criteria for use of school buildings and schoolyards, (8) restriction on planting rice, (9) acceptable activity concentrations in feedstuff, (10) acceptable activity concentrations in compost, (11) criteria for export containers and ships, (12) criteria for contaminated waste, (13) standards for radiation workers engaged in decontamination work. In this report, the basis of and issues on these criteria are summarized.
Liu, W.; Nagatake, Taku; Takase, Kazuyuki; Wu, C. X.*; Ono, Daisuke*; Ueno, Naohiro*; Yamada, Hiroshi*; Xu, C. N.*
Proceedings of 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference (ICONE-20 & POWER 2012) (DVD-ROM), 6 Pages, 2012/07
Elasticoluminescent materials, which is a kind of mechanoluminescence, has been used in visualization of stress distribution of constructions, such as a bridge or a building, under normal temperature condition. In this paper, the elasticoluminescent material is used under high temperature condition to seek the possibility of the visualization of the distribution of thermal stress. Test section was designed to be able to generate thermal stress. Luminescence data from the elasticoluminescent materials, strain data from strain sensors and temperature distribution data from thermograph were measured. Stress analysis was carried out for the test section with ABAQUS code. The comparison between luminescence data and the analysis results show that the elasticoluminescent material can measure the distribution of thermal stress qualitative.
Kawai, Masayoshi*; Futakawa, Masatoshi; Naoe, Takashi; Xu, C.-N.*; Yamada, Hiroshi*
Proceedings of 7th International Symposium on Impact Engineering (ISIE 2010) (CD-ROM), p.380 - 385, 2010/07
We have proposed a sophisticated novel method of the SHB experiment to measure the time-dependent local strain distributions on a surface of the specimen by using mechanoluminescent materials combined with a high-speed camera and an image intensifier. The feasibility study was made for the aluminum specimens pasted with a typical mechanoluminescent material -Eu doped SrAl
O
film, in order to obtain the fundamental data for the method. Our results showed that SrAlO: Eu emitted lights as a response to the strain. Rise up of the light intensity was swift enough to follow the strain change due to HP impact. The luminescence intensity was experimentally verified and expressed as product of strain and strain rate. Accordingly, it can be said that this method gives a good tool for measuring time variation of local strain distributions.
Yamada, Tomonori; Kawai, Hiroshi*
Keisan Kogaku Koenkai Rombunshu, 15(1), p.179 - 180, 2010/05
In this study, computational performance of iterative solver of large linear equations with many right hand side vectors derived from finite element discretization in structural mechanics is evaluated. The current multicore architecture has memory wall problem and many iterative solvers suffer for this problem. Hence, high performance computing with iterative solver on multicore architecture is one of key issues in recent computer science. Because the performance of sparse matrix single vector multiplication has well surveyed, the performance of sparse matrix multiple vectors multiplication is investigated in this paper.
Ikeda, Shugo; Tokiwa, Yoshifumi*; Haga, Yoshinori; Yamamoto, Etsuji; Okubo, Tomoyuki*; Yamada, Mineko*; Nakamura, Noriko*; Sugiyama, Kiyohiro*; Kindo, Koichi*; Inada, Yoshihiko*; et al.
Journal of the Physical Society of Japan, 72(3), p.576 - 581, 2003/03
Times Cited Count：41 Percentile：82.46(Physics, Multidisciplinary)no abstracts in English
Liu, W.; Nagatake, Taku; Takase, Kazuyuki; Wu, C. X.*; Ono, Daisuke*; Yamada, Hiroshi*; Xu, C.-N.*
no journal, ,
Elasticoluminescent materials, which is a kind of mechanoluminescence and has been used in visualization of stress distribution of constructions, such as a bridge or a building, under normal temperature condition. In this paper, the elasticoluminescent material is used under high temperature condition to seek the possibility of the visualization of the distribution of thermal stress. Test section was designed to be able to generate thermal stress. Luminescence data from the elasticoluminescent materials, strain data from strain sensors and temperature distribution data from thermograph were measured. Stress analysis was carried out for the test section with ABAQUS code. The comparison between luminescence data and the strain data show that the elasticoluminescent material can measure the distribution of thermal stress qualitative.
Liu, W.; Nagatake, Taku; Takase, Kazuyuki; Wu, C. X.*; Ono, Daisuke*; Yamada, Hiroshi*; Xu, C.-N.*
no journal, ,
Elasticoluminescent materials, so far, has been used in visualization of stress distribution of constructions, such as a bridge or a building, under normal temperature condition. In this paper, it is used under high temperature condition to seek the possibility of the visualization of the distribution of thermal stress. Test section was designed to be able to generate thermal stress. Luminescence data from the elasticoluminescent materials, strain data and temperature distribution data were derived. The comparison between the luminescence data and the strain data show the elasticoluminescent material can measure the distribution of thermal stress qualitative.
