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福岛第一核电站事故对日本关东地区空气中吸收剂量率的影响。

IMPACT ON ABSORBED DOSE RATE IN AIR IN KANTO REGION BY FUKUSHIMA DAIICHI NUCLEAR POWER PLANT ACCIDENT.

作者信息

Inoue K, Arai M, Tsuruoka H, Saito K, Fujisawa M, Nakazawa S, Veerasamy N, Fukushi M

机构信息

Department of Radiological Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo, Japan.

Department of Radiological Sciences, Tsukuba International University, 6-20-1 Manabe, Tsuchiura, Ibaraki, Japan.

出版信息

Radiat Prot Dosimetry. 2019 Oct 1;184(3-4):500-503. doi: 10.1093/rpd/ncz073.

DOI:10.1093/rpd/ncz073
PMID:31330022
Abstract

Absorbed dose rates in air were measured for the whole area of the Kanto region in 2015, 2016 and 2017 (n = 31 147). The mean absorbed dose rates in air for each prefecture measured by car-borne surveys were from 44 to 67 nGy h-1 (13-289 nGy h-1). The absorbed dose rate in air from artificial radionuclides (134Cs + 137Cs) measured by fixed-point observation (n = 507) was from 1 to 14 nGy h-1 (0-105 nGy h-1), and meaning that the contribution ratios of 134Cs and 137Cs were 3-22%. The deposited location of artificial radionuclides was less than 1000 m from ground level and depended on the topography, wind direction and precipitation field.

摘要

2015年、2016年和2017年对关东地区全域的空气吸收剂量率进行了测量(n = 31147)。通过车载调查测量的各都道府县空气中的平均吸收剂量率为44至67纳戈瑞每小时(13 - 289纳戈瑞每小时)。通过定点观测测量的人工放射性核素(134铯 + 137铯)在空气中的吸收剂量率为1至14纳戈瑞每小时(0 - 105纳戈瑞每小时),这意味着134铯和137铯的贡献率为3% - 22%。人工放射性核素的沉积位置距离地面不到1000米,且取决于地形、风向和降水场。

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