Assessment of radiation doses to off-site responders in TEPCO Fukushima Daiichi Nuclear Power Station Accident

Shimada, Kazumasa; Iijima, Masashi*; Watanabe, Masatoshi*; Takahara, Shogo

Proceedings of Asian Symposium on Risk Assessment and Management 2021 (ASRAM 2021) (Internet), 17 Pages, 2021/10

The radiation doses received by the off-site responders in the Fukushima Daiichi Nuclear Power Station accident were assessed. Atmospheric dispersion simulation was conducted with the source term of the previous research to calculate the atmospheric concentration and ground surface deposition in the municipalities where off-site responders actives. The external exposure dose from cloudshine and groundshine, the internal exposure dose due to inhalation of radioactive plume and resuspended radio nuclei, and the temporal and spatial distribution within each municipality were assessed. As a result of comparing the assessed values of the external exposure dose with the measured values of the personal dosimeter, the measured values were within the assessed range. As a result of our assessment with internal dose exposure, if the exposures occurred without protective measures, the potential daily effective dose in the period between 12 and 31 March 2011 were several tens mSv per day or more in the relatively high dose area. Therefore, to keep the doses received by the responders below the reference level of 20 mSv recommended by the ICRP, it is necessary to ensure that the protective measures for internal exposures such as masks are taken, and to manage the time spent for their activity at least daily.

Nitrogen K-edge X-ray absorption near edge structure of pyrimidine-containing nucleotides in aqueous solution

Shimada, Hiroyuki*; Minami, Hirotake*; Okuizumi, Naoto*; Sakuma, Ichiro*; Ukai, Masatoshi*; Fujii, Kentaro; Yokoya, Akinari; Fukuda, Yoshihiro*; Saito, Yuji

Journal of Chemical Physics, 142(17), p.175102_1 - 175102_9, 2015/05

AA2015-0073.pdf:1.15MB

https://doi.org/10.1063/1.4919744

Nitrogen K-edge X-ray absorption near edge structure (XANES) spectra of purine-containing nucleotides in aqueous solution

Shimada, Hiroyuki*; Fukao, Taishi*; Minami, Hirotake*; Ukai, Masatoshi*; Fujii, Kentaro; Yokoya, Akinari; Fukuda, Yoshihiro*; Saito, Yuji

Journal of Chemical Physics, 141(5), p.055102_1 - 055102_8, 2014/08

https://doi.org/10.1063/1.4891480

Radiochemical analysis of waste debris and stagnant water in Fukushima-1 Nuclear Power Plant, 2; Analysis of Se-79, Tc-99, I-129, and -particle emitting nuclides

Hoshi, Akiko; Yasuda, Mari; Yonekawa, Naoki; Kajio, Masatoshi; Niiyama, Takuya; Yabuki, Koshi; Shimada, Asako; Kameo, Yutaka

no journal, , 

no abstracts in English

Applicability examination for water stoppage using the photo-curable resin; Development of water stoppage technique by the improved photo-curable resin

Shimada, Kozue; Tomizuka, Chiaki; Shibata, Takuya; Ooka, Makoto; Maekawa, Yasunari*; Aoyagi, Katsuhiro*; Shinoki, Masatoshi*; Katagiri, Genichi*; Ozaki, Hiroshi*; Koyama, Shinichi

no journal, , 

no abstracts in English

Study on performance evaluation of Self-Actuated Shutdown System (SASS) in sodium-cooled fast reactor, 3; Demonstration test of SASS in sodium

Shimada, Ren*; Matsunaga, Shoko*; Kajitani, Fumito*; Yoshida, Yoshihiko*; Inuzuka, Taisuke*; Yoshida, Keisuke*; Futagami, Satoshi; Kameyama, Masatoshi*

no journal, , 

no abstracts in English