TY - JOUR
T1 - Estimated internal exposure doses due to indoor radiocaesium contamination in residential houses after the Fukushima nuclear accident
AU - Yoshida-Ohuchi, Hiroko
AU - Shinohara, Naohide
N1 - Funding Information:
This work was supported by a Study of the Health Effects of Radiation Organized by Ministry of the Environment, Japan. The authors thank Dr. Takashi Nakano (National Institutes for Quantum and Radiological Science and Technology) and Dr. Kentaro Manabe (Japan Atomic Energy Agency) for the support to measurement of internal radioactivities with a WBC and to calculation using DCAL software, respectively. We would like to express our sincere gratitude to the residents of the houses studied for their cooperation with this work, the headmen of wards, and local authorities in towns of Namie, Okuma, Futaba, and Tomioka.
Publisher Copyright:
© 2020, The Author(s).
PY - 2020/12/1
Y1 - 2020/12/1
N2 - This work first reports the estimation of the internal exposure from ingestion of house dust and inhalation of aerosol, by employing a measured data on 137Cs activities, bioaccessibility (solubility to water and 1 M HCl), and particle size distribution. The house dust and aerosol samples were collected during the actual indoor cleaning by vacuuming and dusting, from 65 houses and buildings in proximity to the Fukushima Daiichi nuclear power plant (FDNPP) (1.6–16.1 km from the FDNPP) during a period from April 2016 to January 2019. Committed effective doses for an adult owing to the ingestion of house dust of 20 mg per day, which adheres to one’s hands through the hand-to-mouth, and those owing to inhalation of aerosol during dusting for 1.5 h while wearing a mask, were calculated using DCAL software for each house or building, as 1.13 µSv and 4.55 µSv as maximum doses, respectively (as of March 2011). Both the committed effective doses, owing to ingestion and inhalation, were inversely correlated with the distance from the FDNPP, and positively correlated with the indoor surface contamination.
AB - This work first reports the estimation of the internal exposure from ingestion of house dust and inhalation of aerosol, by employing a measured data on 137Cs activities, bioaccessibility (solubility to water and 1 M HCl), and particle size distribution. The house dust and aerosol samples were collected during the actual indoor cleaning by vacuuming and dusting, from 65 houses and buildings in proximity to the Fukushima Daiichi nuclear power plant (FDNPP) (1.6–16.1 km from the FDNPP) during a period from April 2016 to January 2019. Committed effective doses for an adult owing to the ingestion of house dust of 20 mg per day, which adheres to one’s hands through the hand-to-mouth, and those owing to inhalation of aerosol during dusting for 1.5 h while wearing a mask, were calculated using DCAL software for each house or building, as 1.13 µSv and 4.55 µSv as maximum doses, respectively (as of March 2011). Both the committed effective doses, owing to ingestion and inhalation, were inversely correlated with the distance from the FDNPP, and positively correlated with the indoor surface contamination.
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U2 - 10.1038/s41598-020-74182-x
DO - 10.1038/s41598-020-74182-x
M3 - Article
C2 - 33057093
AN - SCOPUS:85092672528
VL - 10
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
IS - 1
M1 - 17212
ER -