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Kinase, Sakae; Kimura, Masanori; Takahara, Shogo; Homma, Toshimitsu
Proceedings of 13th International Congress of the International Radiation Protection Association (IRPA-13) (Internet), 6 Pages, 2012/05
dose rates on contaminated ground at the Fukushima Daiichi Nuclear Power Plant SiteTsujimura, Norio; Yoshida, Tadayoshi; Furuta, Sadaaki
Proceedings of 13th International Congress of the International Radiation Protection Association (IRPA-13) (Internet), 10 Pages, 2012/05
Fujita, Hiroki; Nagaoka, Mika; Kono, Takahiko; Takeyasu, Masanori; Kawasaki, Masatsugu; Okura, Takehisa; Tsujimura, Norio; Sumiya, Shuichi; Momose, Takumaro; Furuta, Sadaaki
Proceedings of 13th International Congress of the International Radiation Protection Association (IRPA-13) (Internet), 7 Pages, 2012/05
The nuclear accident at Fukushima Dai-ichi Nuclear Power Station of Tokyo Electric Power Co. (TEPCO) was caused by the Tohoku District-off the Pacific Ocean Earthquake. Various kinds of radionuclides were released from the power station right after the accident occurred and then reached our laboratories. Therefore, environmental monitoring was reinforced by observation of air absorbed dose rate, periodic collection of airborne dust, precipitation. The collected samples were used to determine radioactivity of 
ray emitters by High pure Germanium semiconductor detector. Moreover, rainwater and humidity were collected to do the usual routine monitoring. In some samples, 
Sr, 
I, 
Cs and 
Cs were detected with radioactivity released from the Fukushima station. In other samples such as seawater, seabed soil and etc., similar radionuclides were detected including the influence of the accident.
Takahara, Shogo; Kato, Takaaki*; Kimura, Masanori; Nishikawa, Masashi*; Homma, Toshimitsu
no journal, ,
The monetary values based on the WTP approach are subject to people's perceptions related to the controllability, the extent of voluntary acceptance and the level of own responsibility. Such effects are called "context effects." In the present study, to clarify the context effects on the WTP-based monetary values for reducing risks of radiation exposures in nuclear accidents, a contingent valuation survey was conducted in vicinity areas of Japanese nuclear power sites before the Fukushima Daiichi Nuclear Power Plant accident. From the results of the survey, it was confirmed the WTP for the reduction of the mortality risks of fatal cancer induced by radiation exposures in a nuclear accident is lower than the WTPs for the reducing risks of fatal cancer from the other causes. Consequently, the WTP for the reducing risks due to nuclear accidents was found to be subject to the context effects in terms of the responsibility for reducing risks.
Hato, Shinji*; Kimura, Masanori; Kinase, Sakae
no journal, ,
no abstracts in English
Sanada, Yukihisa; Sugita, Takeshi; Kondo, Atsuya; Torii, Tatsuo
no journal, ,
Kono, Takahiko; Ogino, Haruyuki*; Hayakawa, Hironobu*; Shimo, Michikuni*; Taniguchi, Kazufumi*; Ban, Nobuhiko*
no journal, ,
After Fukushima Daiichi Nuclear Power Plant accident happened on 11 March 2011, we have been providing the right information about radiation and radioactivity via a Q&A website. Immediately after the accident, volunteers of Japan Health Physics Society (JHPS) built up a website named Questions and Answers about Radiation in Daily Life. They carefully answered all of the questions posted on the website. In August, Steering Committee of the Q&A site was officially established in JHPS. Since then, the Committee has been engaged in the risk communication activities to the public. We have analyzed characteristics of questioners and question contents of about 1,500 posted on our web site so far. It has been found that mothers of small children form the major portion of the questioners all through the period.
Seki, Akiyuki; Takemiya, Hiroshi; Takahashi, Fumiaki; Saito, Kimiaki; Tanaka, Kei*; Takahashi, Yutaka*; Takemura, Kazuhiro*; Tsuzawa, Masaharu*
no journal, ,
Radioactive database and contamination map for the accident of Fukushima Dai-ichi Nuclear Power Plant are described. It is necessary to obtain precise data on the contamination conditions. Both systems have been developed to provide information to identify the current distribution of released materials and to support decontamination planning. The former is designed to provide quantitative data for detailed analysis, while another to provide intuitive images for the qualitative estimation. They contain air dose rates at around 2,200 locations within approximately 100 km from the plant, and radionuclide concentration data at each location. The vehicle-borne survey results are also included for the purpose of ascertaining the distribution of radioactive substances around roads in detail. All the data have been measured during the first investigation conducted in June, and the second in December 2011. The systems will become open to the public at the site of JAEA soon.
Saito, Kimiaki; Takahashi, Fumiaki; Kinouchi, Nobuyuki; Saegusa, Jun; Fujiwara, Mamoru*; Tanihata, Isao*; Saito, Takashi*; Shimoura, Susumu*; Ikeuchi, Yoshihiro*
no journal, ,
