NIRS external dose estimation system for Fukushima residents after the Fukushima Dai-ichi NPP accident

Akahane, Kouichi; Yonai, Shunsuke; Fukuda, Satoshi; Miyahara, Nobuyuki; Yasuda, Hiroshi; Iwaoka, Kazuki; Matsumoto, Masaki; Fukumura, Akifumi; Akashi, Makoto

doi:10.1038/srep01670

Cited by 69 publications

(61 citation statements)

References 5 publications

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“…In addition, in a health management survey for Fukushima inhabitants, an airkerma rate of 0.04 μGy h -1 from natural radionuclides was considered to evaluate additional external exposure during the four months following the nuclear disaster 29,41) . The results of this study are comparable to those of the previous studies.…”

Section: Discussionmentioning

confidence: 99%

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Radiation survey on Fukushima Medical University premises about four years after the Fukushima nuclear disaster

Omori¹,

Wakamatsu

Ishikawa³

2016

FJMS

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This study was conducted on the Fukushima Medical University (FMU) premises (in Fukushima City, Fukushima Prefecture) about four years after the Fukushima Daiichi Nuclear Power Plant accident. Its objectives were (1) to create a map of the ambient gamma dose rate (air -kerma rate) distribution, (2) to evaluate the air -kerma rate originating from natural radionuclides, and (3) to investigate the effects of snow cover on changes in the air -kerma rate. This man -borne survey revealed that the air -kerma rate varies widely, ranging from 0.038 μGy h -1 to 0.520 μGy h -1, and is higher on grass than on the other investigated surface types, such as soil, asphalt, and bricks. In this area, the mean air -kerma rate from natural radiation was evaluated to be 0.03 ± 0.01 μGy h , which was measured in central Fukushima City by a local authority. Furthermore, snowfall was found to reduce the air -kerma rate by 5% -30%. This reduction was attributed to attenuation of the primary radiation while passing through the snow cover, and the measured contribution of scattered radiation to the air -kerma rate reduction was small. The reduction rate was found to depend on the initial snow depth but to maintain a similar value for a couple of days, after the snow had partially melted and its depth had decreased. Finally, analysis of the daily dose due to external exposure received on the FMU premises revealed that no further health effects due to chronic radiation exposure at this site are to be expected.

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Section: Discussionmentioning

confidence: 99%

“…According to Moriuchi et al 28) , the conversion factor is 0. Cs) 29) and the ratio of ambient dose equivalent rate to airkerma rate (1.25 Sv Gy -1 ) 30) . For the more conserv ative dose estimation, the conversion factor of 0.748 Sv Gy -1 was used.…”

Section: Estimation Of Dose Due To External Exposure Received On Fmu mentioning

confidence: 99%

Radiation survey on Fukushima Medical University premises about four years after the Fukushima nuclear disaster

Omori¹,

Wakamatsu

Ishikawa³

2016

FJMS

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“…The impact of external exposure from the surrounding environment is considered to be potentially larger depending on the area as well as on the individual habits and activities. External exposure data have been gathered in the Prefecture health survey in collaboration with dose assessment [19]. In the future we consider building a system that can manage all the radiation exposures (including medical exposures) of the individual, with the main purpose to develop the radiation protection culture.…”

Section: Subject Of Future Investigationmentioning

confidence: 99%

A Study of a Development of Internal Exposure Management Tool Suited for Japanese Diet Behavior

Hasegawa¹,

Oku²,

Fujise³

et al. 2016

Radiological Issues for Fukushima’s Revitalized Future

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After the Fukushima Nuclear Power Plant accident, one of the main issues at stake was the potential intake of contaminated foodstuff by residents of the affected areas. In this context, the importance of the management of the internal exposure by food intake has emerged. For this purpose, a system was developed for estimating the amount of the radioactivity ingested through the diet in order to manage the internal exposure evolution of exposed people. The ultimate goal of this system is to consider all the radiation exposure data including medical exposure in an integrated manner.In this perspective, a tool that was used for internal exposure assessment in Europe after the Chernobyl disaster has been adapted to be suitable to Japanese diet behavior. The tool was implemented in a Web application in order to estimate the amount of radioactivity in the dish and to manage the internal exposure history of the individuals. This system automatically collects the test results of radionuclide in foods available on the web.It manages the individual internal exposure history estimating the amount of radioactivity in the ingested dish. The developed application enables individual to manage his/her protection by checking radioactivity ingestion history and

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“…In comparison, the CF value for artificial radiation ( . 23,24) However, a CF value of 0.748 Sv Gy -1 was used for a conservative dose estimation according to previous reports. 16,20) The geometric means of the annual absorbed dose in air by the surveys in 2011, 2014 and 2015 were 32, 11 and 8 mGy, respectively.…”

Section: Estimation Of Annual Effective Dosementioning

confidence: 99%

Investigation of Absorbed Dose Rate in Air by a Car-borne Survey in Namie Town, Fukushima Prefecture

Pornnumpa

Iwaoka

Hosoda

et al. 2016

Jpn. J. Health Phys.

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NIRS external dose estimation system for Fukushima residents after the Fukushima Dai-ichi NPP accident

Cited by 69 publications

References 5 publications

Radiation survey on Fukushima Medical University premises about four years after the Fukushima nuclear disaster

Radiation survey on Fukushima Medical University premises about four years after the Fukushima nuclear disaster

A Study of a Development of Internal Exposure Management Tool Suited for Japanese Diet Behavior

Investigation of Absorbed Dose Rate in Air by a Car-borne Survey in Namie Town, Fukushima Prefecture

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