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Sakashita, Satoshi; Okui, Masahiro; Yoshida, Tadayoshi; Uezu, Yasuhiro; Okuda, Eiichi
JAEA-Review 2022-012, 42 Pages, 2022/06
JAEA-Review-2022-012.pdf:2.96MB
In this report, results of investigating fire alarm detectors status in order to understand the actual situation of false alarm occurrence and measures to systematically update of them. Based on results of this investigation, measures to systematically update of detectors were taken in order to reduce false fire alarm reports in a harsh environment and aged detectors. Numbers of detectors, false alarms were investigated. Furthermore, causes of their occurrence were investigated for three years (2018-2020). As a result of this investigation, it was found that most of the 34,400 fire alarm detectors in JAEA have been used for more than 20 years. In the last 3 years, 65 false alarms have been reported, 60% of which were found to have been used where the environment should be improved. It was also found that there are many cases where false alarms are reported from a detector within 14 years after installation. Based on the above, three basic policies were formulated. First of all, database will be built for fire alarm maintenance and inspection, secondly, installation location of fire alarm will be improved, and finally, detectors will be updated with reference to the manufacture's plan. According to the three basic policies, it is considered that the reports of false fire alarms will be able to reduced.
Yokota, Wataru; Sato, Takahiro; Kamiya, Tomihiro; Okumura, Susumu; Kurashima, Satoshi; Miyawaki, Nobumasa; Kashiwagi, Hirotsugu; Yoshida, Kenichi; Funayama, Tomoo; Sakashita, Tetsuya; et al.
JAEA-Technology 2014-018, 103 Pages, 2014/09
JAEA-Technology-2014-018.pdf:123.66MB
The world's first microbeam focusing technology for heavy ions of hundreds MeV accelerated by a cyclotron has been developed at the TIARA facility in the Takasaki Advanced Radiation Research Institute of the Japan Atomic Energy Agency. The technology enables us to form a microbeam of less than 1 
m in diameter and to shoot a specified point on a target by one ion (single-ion hit) with spatial accuracy of microbeam size. In the course of the development, a cyclotron technology to accelerate a small energy-spread beam of hundres MeV, which is necessary for focusing to 1 m, has been developed as well as a beam focusing apparatus, beam size measurement and so forth based on the several-MeV microbeam/single-ion hit system of the TIARA electrostatic accelerators. Applicability of the technologies was examined by actual use in irradiation experiment and the result were fed back to them. This paper reports the process and the results of the development over ten years.
and Au+Au collisions at 
= 200 GeVAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Aramaki, Y.*; et al.
Physical Review C, 83(4), p.044912_1 - 044912_16, 2011/04
Times Cited Count：10 Percentile：50.28(Physics, Nuclear)Measurements of electrons from the decay of open-heavy-flavor mesons have shown that the yields are suppressed in Au+Au collisions compared to expectations from binary-scaled collisions. Here we extend these studies to two particle correlations where one particle is an electron from the decay of a heavy flavor meson and the other is a charged hadron from either the decay of the heavy meson or from jet fragmentation. These measurements provide more detailed information about the interaction between heavy quarks and the quark-gluon matter. We find the away-side-jet shape and yield to be modified in Au+Au collisions compared to collisions.
Kobayashi, Yasuhiko; Funayama, Tomoo; Hamada, Nobuyuki*; Sakashita, Tetsuya; Konishi, Teruaki*; Imaseki, Hitoshi*; Yasuda, Keisuke*; Hatashita, Masanori*; Takagi, Keiichi*; Hatori, Satoshi*; et al.
Journal of Radiation Research, 50(Suppl.A), p.A29 - A47, 2009/03
Times Cited Count：39 Percentile：71.47(Biology)Harada, Kosaku*; Nonaka, Tetsuo*; Hamada, Nobuyuki*; Funayama, Tomoo; Sakurai, Hideyuki*; Sakashita, Tetsuya; Wada, Seiichi*; Kawamura, Hidemasa*; Hasegawa, Masatoshi*; Kobayashi, Yasuhiko; et al.
JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 102, 2007/02
Ishiuchi, Shogo*; Hasegawa, Masatoshi*; Yoshida, Yukari*; Hamada, Nobuyuki*; Funayama, Tomoo; Wada, Seiichi*; Sakashita, Tetsuya; Kobayashi, Yasuhiko; Nakano, Takashi*
JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 104, 2007/02
, after heavy-ion irradiation; Detection and identification of the stage-specific markerKobayashi, Satoshi*; Sakata, Toshiyuki*; Tsuchiya, Shiori*; Shirai, Koji*; Kiguchi, Kenji*; Fukamoto, Kana; Sakashita, Tetsuya; Funayama, Tomoo; Kobayashi, Yasuhiko
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no abstracts in English
Funayama, Tomoo; Sakashita, Tetsuya; Sato, Takahiro; Fukamoto, Kana; Kurashima, Satoshi; Yokota, Yuichiro; Yokota, Wataru; Kamiya, Tomihiro; Kobayashi, Yasuhiko
no journal, ,
We had developed the heavy-ion microbeam system at TIARA of the Japan Atomic Energy Agency, and utilized for analyzing heavy-ion induced biological effects. Additionally, we have started developing another new focusing microbeam system for carrying out the experiments that cannot be archived by existing collimating microbeam system. The new system can provide finer microbeam by focusing heavy-ion beam from AVF cyclotron using a quadruplet quadrupole lens system. We are now developing a method for irradiating specific region of target sample using the cell targeting station installed last year. The collimating microbeam system was also improved for allowing a novel irradiation means that make a good use of its high fluence characteristics. For that purpose, the cell targeting system of collimating microbeam system was newly designed and updated.
kinase) in the heavy-ion irradiated hemopoietic organs of the silkworm, Kobayashi, Satoshi*; Tsuchiya, Shiori*; Shirai, Koji*; Fukamoto, Kana; Funayama, Tomoo; Sakashita, Tetsuya; Kobayashi, Yasuhiko
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Hasegawa, Noboru*; Nishikino, Masaharu*; Mikami, Katsuhiro*; Okada, Hajime*; Kondo, Shuji*; Kawachi, Tetsuya*; Shimada, Yoshinori*; Kurahashi, Shinri*; Kitamura, Toshiyuki*; Kotyaev, O.*; et al.
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no abstracts in English
Takahashi, Akina; Sakashita, Satoshi; Yoshida, Tadayoshi; Shiba, Kozo
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Sakashita, Satoshi; Takahashi, Akina; Yoshida, Tadayoshi; Shiba, Kozo
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Harada, Kosaku*; Nonaka, Tetsuo*; Hamada, Nobuyuki*; Funayama, Tomoo; Sakurai, Hideyuki*; Wada, Seiichi*; Sakashita, Tetsuya; Hasegawa, Masatoshi*; Kobayashi, Yasuhiko; Nakano, Takashi*
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no abstracts in English
Sakashita, Susumu*; Konishi, Chisato*; Yoshimura, Kimitaka*; Okazaki, Koji*; Shigeta, Naotaka; Yabuuchi, Satoshi; Yamanaka, Yoshiaki*
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no abstracts in English
Fukuda, Mitsuhiro; Arakawa, Kazuo; Sato, Takahiro; Okumura, Susumu; Saito, Yuichi; Kashiwagi, Hirotsugu; Miyawaki, Nobumasa; Yuri, Yosuke; Ishii, Yasuyuki; Kobayashi, Yasuhiko; et al.
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At labeled -methyl-L-phenylalanineSuzuki, Hiroyuki*; Ohshima, Yasuhiro; Hanaoka, Hirofumi*; Watanabe, Shigeki; Watanabe, Satoshi; Sasaki, Ichiro; Sakashita, Tetsuya; Arano, Yasushi*; Ishioka, Noriko
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Sakashita, Satoshi; Ito, Yasuhisa; Nakada, Akira; Uezu, Yasuhiro
no journal, ,
In this presentation, results of the operational condition survey of JAEA's fire alarms will be presented in order to reduce the actual occurrence of false alarms. This investigation collected number of detectors installed and their ages, the occurrence of false alarms and their causes for three years (2018-2020). As a result of this investigation, it was found that more than 70% of the 34,400 fire alarm detectors in JAEA have been used for more than 20 years. And 65 false alarms have been reported for three years. Furthermore, 60% of the false alarm detectors were found to be used in areas requiring environment improvement.
Shobu, Takahisa; Mukai, Tomohisa*; Choe, H.*; Takano, Yoshiki*; Sakashita, Masanobu*; Nakamura, Akihiro*; Morooka, Satoshi; Kurita, Keisuke; Harayama, Isao; Iikura, Hiroshi
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Post-installed anchors are a common technology used in seismic retrofitting work, and it is expected that their range of application will expand to include renovation work such as expansions and reconstructions. In this study, neutrons, which have an extremely high penetrating power for materials, were used to evaluate the long-term adhesion characteristics of post-installed anchors from the results of measuring the strain distribution of rebar under load, etc.
Shiine, Yasuharu*; Sakashita, Yusuke*; Nishikawa, Hiroyuki*; Sato, Takahiro; Ishii, Yasuyuki; Kamiya, Tomihiro; Nakao, Ryota*; Uchida, Satoshi*
no journal, ,
Harada, Kosaku*; Nonaka, Tetsuo*; Sakurai, Hideyuki*; Kawamura, Hidemasa*; Hasegawa, Masatoshi*; Nakano, Takashi*; Hamada, Nobuyuki*; Wada, Seiichi*; Kobayashi, Yasuhiko; Funayama, Tomoo; et al.
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no abstracts in English
