scholarly journals Estimated internal exposure doses due to indoor radiocaesium contamination in residential houses after the Fukushima nuclear accident

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Hiroko Yoshida-Ohuchi ◽  
Naohide Shinohara
Keyword(s):  
Particle Size ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
House Dust ◽  
Nuclear Power ◽  
Measured Data ◽  
Internal Exposure ◽  
Effective Doses ◽  
Fukushima Daiichi ◽  
Work First

Abstract 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.

scholarly journals Assessment of the Annual Additional Effective Doses amongst Minamisoma Children during the Second Year after the Fukushima Daiichi Nuclear Power Plant Disaster

PLoS ONE ◽  
2015 ◽  
Vol 10 (6) ◽  
pp. e0129114 ◽  
Author(s):  
Masaharu Tsubokura ◽  
Shigeaki Kato ◽  
Tomohiro Morita ◽  
Shuhei Nomura ◽  
Masahiro Kami ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Effective Doses ◽  
Fukushima Daiichi ◽  
Second Year

scholarly journals Measurement and communication: what worked and what did not in Fukushima

2016 ◽  
Vol 45 (2_suppl) ◽  
pp. 14-22
Author(s):  
R. Hayano
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Internal Exposure ◽  
Whole Body ◽  
External Exposure ◽  
External Dose ◽  
Exposure Levels ◽  
Fukushima Daiichi ◽  
Body Count

The accident at Fukushima Daiichi nuclear power plant contaminated the soil of densely populated regions in Fukushima Prefecture with radiocaesium, which poses risks of internal and external exposure to the residents. However, extensive whole-body-count surveys have shown that internal exposure levels of residents are negligible. In addition, data from personal dosimeters have shown that external exposure levels have decreased, so the estimated annual external dose of the majority of people is <1 mSv in most areas of Fukushima. Despite these reassuring data, many problems remain in Fukushima, many of which are psychosocial rather than radiological. This article will discuss the roles of measurement and communication in the postaccident phase based on 5 years of experience.

scholarly journals Radiocesium concentrations in wild mushrooms collected in Kawauchi Village after the accident at the Fukushima Daiichi Nuclear Power Plant

PeerJ ◽  
2015 ◽  
Vol 3 ◽  
pp. e1427 ◽  
Author(s):  
Kanami Nakashima ◽  
Makiko Orita ◽  
Naoko Fukuda ◽  
Yasuyuki Taira ◽  
Naomi Hayashida ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Radioactive Cesium ◽  
Wild Mushrooms ◽  
Nuclear Disaster ◽  
Average Intake ◽  
Local Residents ◽  
Effective Doses ◽  
Fukushima Daiichi

It is well known from the experience after the 1986 accident at the Chernobyl Nuclear Power Plant that radiocesium tends to concentrate in wild mushrooms. In this study, we collected wild mushrooms from the Kawauchi Village of Fukushima Prefecture, located within 30 km of the Fukushima Daiichi Nuclear Power Plant, and evaluated their radiocesium concentrations to estimate the risk of internal radiation exposure in local residents. We found that radioactive cesium exceeding 100 Bq/kg was detected in 125 of 154 mushrooms (81.2%). We calculated committed effective doses based on 6,278 g per year (age > 20 years, 17.2 g/day), the average intake of Japanese citizens, ranging from doses of 0.11–1.60 mSv, respectively. Although committed effective doses are limited even if residents eat contaminated foods several times, we believe that comprehensive risk-communication based on the results of the radiocesium measurements of food, water, and soil is necessary for the recovery of Fukushima after this nuclear disaster.

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