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JAEA Reports

Report on false alarms with automatic fire alarm in JAEA; Examination for false alarms reduction

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.

JAEA Reports

Development of microbeam formation and single-ion hit technologies at the TIARA cyclotron

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 $$mu$$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 $$mu$$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.

Journal Articles

Azimuthal correlations of electrons from heavy-flavor decay with hadrons in $$p+p$$ and Au+Au collisions at $$sqrt{s_{NN}}$$ = 200 GeV

Adare, 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:7 Percentile:49.81(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 $$p+p$$ 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 $$p+p$$ collisions.

Journal Articles

Microbeam irradiation facilities for radiobiology in Japan and China

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:37 Percentile:72.85(Biology)

Journal Articles

Bystander killing of human lung cancer cells by heavy charged particle irradiation

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

Journal Articles

Bystander effect of high linear energy transfer charged particle radiation on human glioblastoma cells

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

Oral presentation

Micro-ion-beam applications to life science

Fukuda, Mitsuhiro; Arakawa, Kazuo; Sato, Takahiro; Okumura, Susumu; Saito, Yuichi; Kashiwagi, Hirotsugu; Miyawaki, Nobumasa; Yuri, Yosuke; Ishii, Yasuyuki; Kobayashi, Yasuhiko; et al.

no journal, , 

no abstracts in English

Oral presentation

Analysis of bystander effect in human lung cancer cell line using high-LET heavy-ion microbeam

Harada, Kosaku*; Nonaka, Tetsuo*; Sakurai, Hideyuki*; Kawamura, Hidemasa*; Hasegawa, Masatoshi*; Nakano, Takashi*; Hamada, Nobuyuki*; Wada, Seiichi*; Kobayashi, Yasuhiko; Funayama, Tomoo; et al.

no journal, , 

no abstracts in English

Oral presentation

Cytotoxic effect of high linear energy transfer charged particle radiation on human glioblastoma cells

Ishiuchi, Shogo*; Hasegawa, Masatoshi*; Nakano, Takashi*; Hamada, Nobuyuki*; Wada, Seiichi*; Kobayashi, Yasuhiko; Funayama, Tomoo; Sakashita, Tetsuya

no journal, , 

no abstracts in English

Oral presentation

Analysis of bystander effect using high-LET heavy-ion microbeam

Harada, Kosaku*; Nonaka, Tetsuo*; Hamada, Nobuyuki*; Funayama, Tomoo; Sakurai, Hideyuki*; Wada, Seiichi*; Sakashita, Tetsuya; Hasegawa, Masatoshi*; Kobayashi, Yasuhiko; Nakano, Takashi*

no journal, , 

no abstracts in English

Oral presentation

Regeneration mechanisms of hemopoietic organs in the silkworm, ${it Bombyx mori}$, after heavy-ion irradiation; Detection and identification of the stage-specific marker

Kobayashi, Satoshi*; Sakata, Toshiyuki*; Tsuchiya, Shiori*; Shirai, Koji*; Kiguchi, Kenji*; Fukamoto, Kana; Sakashita, Tetsuya; Funayama, Tomoo; Kobayashi, Yasuhiko

no journal, , 

no abstracts in English

Oral presentation

Current status of heavy-ion microbeam systems at JAEA-Takasaki

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.

Oral presentation

Expression analysis of BeK (Bombyx eIF2$$alpha$$kinase) in the heavy-ion irradiated hemopoietic organs of the silkworm, ${it Bombyx mori}$

Kobayashi, Satoshi*; Tsuchiya, Shiori*; Shirai, Koji*; Fukamoto, Kana; Funayama, Tomoo; Sakashita, Tetsuya; Kobayashi, Yasuhiko

no journal, , 

no abstracts in English

Oral presentation

Electromagnetic survey in coastal area at Horonobe in Hokkaido, 3; Study on interpretation of the resistivity section using rock physics

Sakashita, Susumu*; Konishi, Chisato*; Yoshimura, Kimitaka*; Okazaki, Koji*; Shigeta, Naotaka; Yabuuchi, Satoshi; Yamanaka, Yoshiaki*

no journal, , 

no abstracts in English

Oral presentation

Fabrication of three-dimensional pillar arrays by PBW for improved trapping performance of dielectrophoretic devices

Shiine, Yasuharu*; Sakashita, Yusuke*; Nishikawa, Hiroyuki*; Sato, Takahiro; Ishii, Yasuyuki; Kamiya, Tomihiro; Nakao, Ryota*; Uchida, Satoshi*

no journal, , 

Oral presentation

Synthesis and evaluation of $$^{211}$$At labeled $$alpha$$-methyl-L-phenylalanine

Suzuki, Hiroyuki*; Ohshima, Yasuhiro; Hanaoka, Hirofumi*; Watanabe, Shigeki; Watanabe, Satoshi; Sasaki, Ichiro; Sakashita, Tetsuya; Arano, Yasushi*; Ishioka, Noriko

no journal, , 

no abstracts in English

Oral presentation

Development of the novel maintenance conservation method for infrastructures by using the laser technology

Hasegawa, Noboru*; Nishikino, Masaharu*; Mikami, Katsuhiro*; Okada, Hajime*; Kondo, Shuji*; Kawachi, Tetsuya*; Shimada, Yoshinori*; Kurahashi, Shinri*; Kitamura, Toshiyuki*; Kotyaev, O.*; et al.

no journal, , 

no abstracts in English

Oral presentation

Surface contamination detecting and scanning speed using survey meters

Takahashi, Akina; Sakashita, Satoshi; Yoshida, Tadayoshi; Shiba, Kozo

no journal, , 

no abstracts in English

Oral presentation

Verification of measurements of gamma dose with various dosimeters at Tokai Reprocessing Plant

Sakashita, Satoshi; Takahashi, Akina; Yoshida, Tadayoshi; Shiba, Kozo

no journal, , 

no abstracts in English

Oral presentation

Detection and scanning speed using survey meters in the surface contamination inspection

Takahashi, Akina; Sakashita, Satoshi; Shiba, Kozo; Yoshida, Tadayoshi

no journal, , 

no abstracts in English

22 (Records 1-20 displayed on this page)