Cargando…

Estimation of β-ray dose in air and soil from Fukushima Daiichi Power Plant accident

Following the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident of 2011, which deposited radionuclides across Tohoku and northern Kanto, β-ray dose evaluation has been performed to estimate radiation exposure for small creatures like insects as well as human skin. Using the Monte Carlo radiatio...

Descripción completa

Detalles Bibliográficos
Autores principales: Endo, Satoru, Tanaka, Kenichi, Kajimoto, Tsuyoshi, Thanh, Nguyen Tat, Otaki, Joji M., Imanaka, Tetsuji
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4014171/
https://www.ncbi.nlm.nih.gov/pubmed/24504671
http://dx.doi.org/10.1093/jrr/rrt209
_version_ 1782315147902058496
author Endo, Satoru
Tanaka, Kenichi
Kajimoto, Tsuyoshi
Thanh, Nguyen Tat
Otaki, Joji M.
Imanaka, Tetsuji
author_facet Endo, Satoru
Tanaka, Kenichi
Kajimoto, Tsuyoshi
Thanh, Nguyen Tat
Otaki, Joji M.
Imanaka, Tetsuji
author_sort Endo, Satoru
collection PubMed
description Following the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident of 2011, which deposited radionuclides across Tohoku and northern Kanto, β-ray dose evaluation has been performed to estimate radiation exposure for small creatures like insects as well as human skin. Using the Monte Carlo radiation transport code MCNP-4C, we calculated the β-ray dose for (129m)Te, (129)Te, (131)I, (132)Te, (132)I, (134)Cs and (137)Cs in air as a function of altitude and in soil. These calculations of β-dose rate for each radionuclide were conducted for the conditions following the FDNPP accident, with (137)Cs deposition assumed to be 1000 kBq/m(2). Beta-ray dose rate was found to be ∼10-fold (resp. 5-fold) higher than the γ-ray dose rate in the soil (resp. on the ground surface) at ∼20 days after deposition, and ∼4-fold (resp. 1.7-fold) higher after 6 months or more. For convenience, the height dependence of the ratio for 0, 10, 30, 90, 180 and 365 days after deposition was obtained by a fitting function. The cumulative 70 µm β-ray dose at 30, 60 and 90 days after deposition was estimated to be 35, 45 and 53 mGy for the ground surface, and 61, 79 and 92 mGy in the soil, respectively. These results can be used to estimate the external β-ray exposure for small creatures as well as for human skin.
format Online
Article
Text
id pubmed-4014171
institution National Center for Biotechnology Information
language English
publishDate 2014
publisher Oxford University Press
record_format MEDLINE/PubMed
spelling pubmed-40141712014-05-12 Estimation of β-ray dose in air and soil from Fukushima Daiichi Power Plant accident Endo, Satoru Tanaka, Kenichi Kajimoto, Tsuyoshi Thanh, Nguyen Tat Otaki, Joji M. Imanaka, Tetsuji J Radiat Res Biology Following the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident of 2011, which deposited radionuclides across Tohoku and northern Kanto, β-ray dose evaluation has been performed to estimate radiation exposure for small creatures like insects as well as human skin. Using the Monte Carlo radiation transport code MCNP-4C, we calculated the β-ray dose for (129m)Te, (129)Te, (131)I, (132)Te, (132)I, (134)Cs and (137)Cs in air as a function of altitude and in soil. These calculations of β-dose rate for each radionuclide were conducted for the conditions following the FDNPP accident, with (137)Cs deposition assumed to be 1000 kBq/m(2). Beta-ray dose rate was found to be ∼10-fold (resp. 5-fold) higher than the γ-ray dose rate in the soil (resp. on the ground surface) at ∼20 days after deposition, and ∼4-fold (resp. 1.7-fold) higher after 6 months or more. For convenience, the height dependence of the ratio for 0, 10, 30, 90, 180 and 365 days after deposition was obtained by a fitting function. The cumulative 70 µm β-ray dose at 30, 60 and 90 days after deposition was estimated to be 35, 45 and 53 mGy for the ground surface, and 61, 79 and 92 mGy in the soil, respectively. These results can be used to estimate the external β-ray exposure for small creatures as well as for human skin. Oxford University Press 2014-05 2014-02-05 /pmc/articles/PMC4014171/ /pubmed/24504671 http://dx.doi.org/10.1093/jrr/rrt209 Text en © The Author 2014. Published by Oxford University Press on behalf of The Japan Radiation Research Society and Japanese Society for Radiation Oncology. http://creativecommons.org/licenses/by/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Biology
Endo, Satoru
Tanaka, Kenichi
Kajimoto, Tsuyoshi
Thanh, Nguyen Tat
Otaki, Joji M.
Imanaka, Tetsuji
Estimation of β-ray dose in air and soil from Fukushima Daiichi Power Plant accident
title Estimation of β-ray dose in air and soil from Fukushima Daiichi Power Plant accident
title_full Estimation of β-ray dose in air and soil from Fukushima Daiichi Power Plant accident
title_fullStr Estimation of β-ray dose in air and soil from Fukushima Daiichi Power Plant accident
title_full_unstemmed Estimation of β-ray dose in air and soil from Fukushima Daiichi Power Plant accident
title_short Estimation of β-ray dose in air and soil from Fukushima Daiichi Power Plant accident
title_sort estimation of β-ray dose in air and soil from fukushima daiichi power plant accident
topic Biology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4014171/
https://www.ncbi.nlm.nih.gov/pubmed/24504671
http://dx.doi.org/10.1093/jrr/rrt209
work_keys_str_mv AT endosatoru estimationofbraydoseinairandsoilfromfukushimadaiichipowerplantaccident
AT tanakakenichi estimationofbraydoseinairandsoilfromfukushimadaiichipowerplantaccident
AT kajimototsuyoshi estimationofbraydoseinairandsoilfromfukushimadaiichipowerplantaccident
AT thanhnguyentat estimationofbraydoseinairandsoilfromfukushimadaiichipowerplantaccident
AT otakijojim estimationofbraydoseinairandsoilfromfukushimadaiichipowerplantaccident
AT imanakatetsuji estimationofbraydoseinairandsoilfromfukushimadaiichipowerplantaccident