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Mikami, Satoshi; Saito, Kimiaki
no journal, ,
no abstracts in English
Hamada, Nobuyuki*; Sakashita, Tetsuya*; Sato, Tatsuhiko
no journal, ,
We developed an in silico model of cataractogenesis based on the Monte Carlo method. Detailed of the model development together with the comparison with the epidemiological studies on naturally-induced cataract will be presented at the meeting. Preliminary results of the comparison with the epidemiological studies on radiation-induced cataract will be also discussed.
Hoshi, Katsuya; Yoshida, Tadayoshi; Tsujimura, Norio; Okada, Kazuhiko
no journal, ,
no abstracts in English
Hoshi, Katsuya; Yoshida, Tadayoshi; Tsujimura, Norio; Okada, Kazuhiko
no journal, ,
no abstracts in English
Honda, Fumiya*; Kinase, Sakae
no journal, ,
no abstracts in English
-ray 3 mm depth dose equivalent and protection measures with respect to the lens of the eye, 3; Adaptability to field worksTakimoto, Misaki; Okuyama, Shun; Yamazaki, Takumi; Ito, Yasuhisa; Takada, Chie; Tsujimura, Norio; Shiba, Kozo; Okada, Kazuhiko; Namiki, Atsushi
no journal, ,
no abstracts in English
Matsubara, Natsumi; Nagaoka, Mika; Fujita, Hiroki; Nakano, Masanao
no journal, ,
no abstracts in English
Okura, Takehisa; Omori, Shuhei; Kawasaki, Masatsugu
no journal, ,
Ambient gamma dose rate has monitored at the several sites around nuclear facilities of Nuclear Science Research Center, JAEA in Tokai, Ibaraki. Effect of the Fukushima accident prevents from monitoring of influence from the nuclear facilities. Chronicle variation of ambient gamma dose rate for 5 years after the Fukushima accident was analyzed statistically by dividing components of the Fukushima accident and extracting environmental factor of it. Variation of the environmental factor was evaluated quantitatively and verified. This result will be basic material to optimize the monitoring of the dose rate by distinguishing influence from nuclear facilities from the effect of the Fukushima accident.
Nagaoka, Mika; Fujita, Hiroki; Kurihara, Osamu*
no journal, ,
no abstracts in English
He in radioactive gaseous wasteKometani, Tatsunari; Furutani, Misa; Nakagawa, Masahiro; Ueno, Yumi; Sato, Junya
no journal, ,
no abstracts in English
Kasugai, Yoshimi; Sato, Koichi; Masuyama, Koichi; Seki, Kazunari; Miyamoto, Yukihiro; Kai, Tetsuya; Harada, Masahide; Haga, Katsuhiro; Takada, Hiroshi
no journal, ,
no abstracts in English
Kosako, Toshiso*; Tani, Kotaro*; Ogino, Haruyuki*; Iida, Takao*; Hattori, Takatoshi*; Oda, Keiji*; Omi, Tadashi*; Furuta, Sadaaki*; Murakami, Hironori*; Kasai, Atsushi*; et al.
no journal, ,
Two proposal notes were written by the Japan Health Physics Society in terms of the issues on radiation protection considering the arguments in many academic symposiums after the accident in TEPCO Fukushima-Daiichi NPP resulting from the Great East Japan Earthquake of March 11, 2011. These proposal notes were referred in some symposiums, and the follow-up activities are needed for collecting the chronological information after the Fukushima accident and for considering these proposal matter in detail. After the proposal notes were published, quite many activities for radiation protection were performed. In this professional workshop, the chronological information was collected and easily evaluated concerning with the proposal. In this presentation, the outcome was introduced.
Takahashi, Fumiaki
no journal, ,
The Japan Health Physics Society holds the 50th Annual Meeting by collaboration with Japanese Society of Radiation Safety Management. Educational Session is set for young researchers at the meeting. Public dose from natural radiation in Japan is one of the session topics. The radiation dose from natural background is announced to public following the accident at TEPCO Fukushima Dai-ichi NPP accident. Principal radiation sources are terrestrial radiation, cosmic radiation, radon and radioactivity in food. The levels of radiation dose and radioactivity are continuously investigated in Japan. As a conversion coefficient is applied to estimate effective dose from the radiation dose or radioactivity, the revise of conversion coefficient affects the result of public dose. In addition, a life-style is an influential factor on the radiation dose to public, too. Thus, the basic radiation dose and method to estimate radiation dose should be comprehended, if an expert explains the public dose.
Takahashi, Fumiaki; Ishimori, Yuu; Sanada, Tetsuya*; Furukawa, Masahide*; Yasuda, Hiroshi*
no journal, ,
The Japan Health Physics Society (JHPS) launched Committee on Dose Assessments of Japanese Population, because public has interests on exposure that has been reported accompanying with monitoring data following the accident of Fukushima Dai-ichi Nuclear Power Plant. The Committee has made discussion on exposure from natural radiation. Radiation data have been investigated terrestrial 
-rays, cosmic rays, radon and radioactive material in food, because these sources contribute to population in Japan. The model for radiation dose estimation is also the examination object in the Committee. A topics session for the Commission is held at the Congress of JHPS to make discussion on the population dose in Japan.
Satou, Yukihiko; Sueki, Keisuke*; Matsuo, Kazuki*; Minowa, Haruka*; Yoshikawa, Hideki
no journal, ,
no abstracts in English
Sueki, Keisuke*; Matsuo, Kazuki*; Sasa, Kimikazu*; Satou, Yukihiko; Yoshikawa, Hideki; Minowa, Haruka*
no journal, ,
no abstracts in English
Shimada, Taro; Miwa, Kazuji; Takeda, Seiji
no journal, ,
Rubbles less than 5
Sv/h of surface dose rate, which are stored in the Fukushima Daiichi NPS (1F) site, will be recycled and applied in a restricted use only within 1F site in the future. In this study, we suggested a concept for establishing the reference radioactive concentration of recycling material for the restricted use in the 1F site, and then calculated the reference radiocesium concentrations of the recycling material used for paved roads and the bases of concrete building. In order to prevent the working time from being decreased, it is necessary for the restricted use to suppress the additional dose to a level of value. Therefore, focusing on the current background air dose rate in the 1F site, we suggested the required condition that air dose rate increased by use of contaminated recycling material instead of non-contaminated did not exceed the variation range of the background dose rate. In addition, to validate the restricted use under the reference concentration, following three items should be confirmed; (1) additional dose for worker using the recycling material does not exceed 2mSv/y, 10% of worker dose limit; (2) the impact to air dose rate evaluated at the 1F site boundary does not exceed the 1mSv/y including direct and skyshine radiations from wastes stored in the site; (3) the impact of migrated radionuclides into groundwater does not exceed the operational target value. The reference radiocesium concentrations for recycling aggregate taken from contaminated concrete rubbles were evaluated for paved road and bases of concrete building.
Miwa, Kazuji; Shimada, Taro; Takeda, Seiji
no journal, ,
In this study, in order to validate the restricted use of recycling material at the reference radiocesium concentration (determined in series report (1)), we evaluated worker annual doses, air dose rate at the site boundary and impact of migrated radiocesium into groundwater. Firstly, we evaluated the additional annual dose for workers, on the assumption that typical workers coming in contact with the source after construction (Road: 1.3 mSv/y, Building: 1.3 mSv/y). Secondly, we evaluated the air dose rates by distance from road and building including recycling material, and investigated the distance for not exceeding 1mSv/y (including additional dose rate by recycling and background dose rate of 0.6 mSv/y) at the site boundary (Road: 25 m, Building: 1 m). Thirdly, we evaluated the Cs and Sr migration in groundwater, and investigated the distance required for satisfying the operation target value (Cs-134: 1 Bq/L, Cs-137: 1 Bq/L, Sr-90: 5 Bq/L) at the boundary (coastal line) (Road: 10 m, Building: 10 m).
Saito, Kimiaki
no journal, ,
no abstracts in English
Aoki, Katsunori; Ogura, Hideki; Ogata, Nobuhisa; Ikeda, Koki; Nagasaki, Yasushi; Tsurudome, Koji; Furuta, Sadaaki*
no journal, ,
no abstracts in English