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Kitao, Takahiko; Takeuchi, Yoshikatsu; Kimura, Takashi; Kojima, Junji; Shioya, Satoshi; Tasaki, Takashi; Nakamura, Hironobu
Nihon Kaku Busshitsu Kanri Gakkai Dai-38-Kai Nenji Taikai Rombunshu (Internet), 9 Pages, 2018/04
In order to ensure and strengthen nuclear security measures, an active cultivation of nuclear security culture implemented by both entire organization and individual persons is vitally essential. Tokai reprocessing facility has conducted various activities such as case study education and training, yearly posters and patrolling the site by upper-level management that all employees hold a deep rooted belief that there is a credible insider and outsider threat, and that nuclear security is important. These activities are conducted in order to establish the foundation of beliefs and attitudes of effective nuclear security culture based on the IAEA guideline. This report introduces our activities fostering nuclear security culture in Tokai reprocessing facility that the evaluation and the continuous improvement of bidirectional activities by both top-down from multiple management levels and bottom-up from individual employee, and our challenges need to be worked on for the future.
Sakanaka, Shogo*; Akemoto, Mitsuo*; Aoto, Tomohiro*; Arakawa, Dai*; Asaoka, Seiji*; Enomoto, Atsushi*; Fukuda, Shigeki*; Furukawa, Kazuro*; Furuya, Takaaki*; Haga, Kaiichi*; et al.
Proceedings of 1st International Particle Accelerator Conference (IPAC '10) (Internet), p.2338 - 2340, 2010/05
Future synchrotron light source using a 5-GeV energy recovery linac (ERL) is under proposal by our Japanese collaboration team, and we are conducting R&D efforts for that. We are developing high-brightness DC photocathode guns, two types of cryomodules for both injector and main superconducting (SC) linacs, and 1.3 GHz high CW-power RF sources. We are also constructing the Compact ERL (cERL) for demonstrating the recirculation of low-emittance, high-current beams using above-mentioned critical technologies.
Sakanaka, Shogo*; Ago, Tomonori*; Enomoto, Atsushi*; Fukuda, Shigeki*; Furukawa, Kazuro*; Furuya, Takaaki*; Haga, Kaiichi*; Harada, Kentaro*; Hiramatsu, Shigenori*; Honda, Toru*; et al.
Proceedings of 11th European Particle Accelerator Conference (EPAC '08) (CD-ROM), p.205 - 207, 2008/06
Future synchrotron light sources based on the energy-recovery linacs (ERLs) are expected to be capable of producing super-brilliant and/or ultra-short pulses of synchrotron radiation. Our Japanese collaboration team is making efforts for realizing an ERL-based hard X-ray source. We report recent progress in our R&D efforts.
Takasaki, Koji; Sagawa, Naoki; Kurosawa, Shigeyuki*; Shioya, Satoshi; Suzuki, Kazunori; Horikoshi, Yoshinori; Mizuniwa, Harumi
JAEA-Technology 2008-028, 73 Pages, 2008/03
Recently, an imaging plate (IP) was developed. Pu analysis by an IP was studied in the JAEA Cooperative Research Scheme on the Nuclear Fuel Cycle, and the availability about detection of Pu and discrimination with radon progenies was shown. In order to apply these results to the radiation control, this research aims at evaluation of radioactivity, discrimination with radon progenies, and evaluation of AMAD by an IP. In the conventional autoradiography (ARG) by a ZnS and Polaroid film, Contamination of Pu can only be grasped by viewing. Since the digital data of the radiation and location is obtained by an IP, Pu can be detected quantitatively and radioactivity can be evaluated. As a result of this research, the image of alpha emitter on an IP is the same as that of the conventional ARG, and can be applied also to the ARG of beta and emitter. In measurement of Pu, the function of Image J (image-analysis software) was very available. Pu radioactivity was evaluated by an IP.
Mizuniwa, Harumi; Takasaki, Koji; Horikoshi, Yoshinori; Suzuki, Kazunori; Shioya, Satoshi; Sagawa, Naoki; Kurosawa, Shigeyuki*
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no abstracts in English
Shioya, Satoshi; Hirayama, Tsutomu*; Ebashi, Tsutomu; Namiki, Atsushi; Momose, Takumaro
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Shioya, Satoshi; Sakuyama, Mitsuhiro*; Adachi, Yasuyuki*; Sato, Kenichiro*; Sanada, Yukihisa; Namiki, Atsushi; Momose, Takumaro
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no abstracts in English
Shioya, Satoshi; Sakuyama, Mitsuhiro*; Kashimura, Katsuya*; Kawasaki, Takashi; Endo, Kuniaki; Ozeki, Kiyoshi
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Shioya, Satoshi; Nakagawa, Takahiro; Yamazaki, Takumi; Tachihara, Joji; Shuji, Yoshiyuki; Kikuno, Hiroshi
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In order to reduce the workload and improve the safety (i.e., prevention of internal exposure) of workers at Plutonium handling facilities, etc., JAEA has introduced a new Powered Air Purifying Respirator (PAPR) full-face mask as respiratory protective equipment. In introducing this mask, we conducted a leakage test in correspondence with Japanese Industrial Standards (JIS). In the leakage test, an examinee person wearing the mask entered an airlock and performed a prescribed action (e.g., stepping up and down on a stepladder, etc.) while the number concentration of NaCl test particles in/out of the mask was measured. Leakage rates were calculated for the results of 10 examinees. The test results showed that the leakage rate of this mask was 0.01% (corresponding to the protection factor of 10000) even when the electric fan was stopped, confirming that the mask remained high protection capability.
Kobayashi, Kenji; Ishii, Tatsuya; Tsubota, Yoichi; Shioya, Satoshi; Ishibashi, Nauya; Nakagawa, Takahiro
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Ishii, Tatsuya; Kobayashi, Kenji; Tsubota, Yoichi; Shioya, Satoshi; Ishibashi, Nauya; Nakagawa, Takahiro
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Kobayashi, Kenji; Ishii, Tatsuya; Tsubota, Yoichi; Shioya, Satoshi; Ishibashi, Nauya; Nakagawa, Takahiro
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Tomioka, Akifumi; Fujisawa, Makoto; Izaki, Kenji; Shioya, Satoshi
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When body contamination occurs, decontamination is carried out basically by wiping with wet paper rag, pouring large amounts of running water, and using detergents such as neutral detergents. However, it can be said that these methods do not reflect much of the technological progress to date. For example, we believe that more efficient body decontamination can be achieved by applying new technologies of the beauty care and health care field. In this study, we evaluated the decontamination effects of multiple commercially available detergents and microbubble showers that are expected to have decontamination effects, through tests using a particulate visualization system and tests using radioactive substances.
Fujisawa, Makoto; Tomioka, Akifumi; Izaki, Kenji; Shioya, Satoshi
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It is important to predict the spread of radioactive materials attached to workers' bodies. We evaluated the degree to which contamination remained after wiping off protective gear and the degree to which contamination was dispersed when it was removed. In the test, we applied fluorescent paint that simulates radioactive substances to protective gear, wiped it off with a wet rag, and removed the gear. And we photographed the fluorescent paint with a camera and evaluated the decontamination effect of wiping and the spread of simulated contamination. As a result of the test, we were able to evaluate the degree to which the protective gear was contaminated.
Ishii, Tatsuya; Kobayashi, Kenji; Tsubota, Yoichi; Shioya, Satoshi; Ishibashi, Nauya; Nakagawa, Takahiro
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no abstracts in English