Changes in environmental radiation levels in Katsushika Ward, Tokyo after the Fukushima Daiichi Nuclear Power Plant accident

被引：1
|
作者：
Tsukada, Mizuho [1 ]
Inoue, Kazumasa [1 ]
Ichihara, Mai [1 ]
Nakazawa, Shuto [1 ]
Sagara, Hiroaki [1 ]
Taguchi, Yoshiaki [1 ]
Fukushi, Masahiro [1 ]
机构：
[1] Tokyo Metropolitan Univ, Grad Sch Human Hlth Sci, Dept Radiol Sci, Arakawa Ku, Tokyo 1168551, Japan
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2021年 / 328卷 / 01期
关键词：
Fukushima Daiichi Nuclear Power Plant accident; Radiocesium; Absorbed dose rate in air; Car-borne survey technique; Ecological half-life; ABSORBED DOSE-RATE; METROPOLITAN TOKYO; WASH-OFF; AIR; RADIOCESIUM; IMPACT;
D O I：
10.1007/s10967-021-07654-7
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Katsushika Ward, located in northeastern Tokyo, had the highest deposition in Tokyo of artificial radionuclides after the Fukushima Daiichi Nuclear Power Plant accident. A car-borne survey for measuring absorbed dose rate in air was carried out in the ward in each of the years 2015-2020. The average dose rates measured in 2015-2018 decreased every year but percentage reductions were smaller after 2018 due to the decrease in Cs-134 amount; this radionuclide decays with a half-life of 2.065 years. Its ecological half-life was estimated to be 1.6 y and that value was shorter than the physical decay life (3.2 y).
引用
收藏
页码：411 / 418
页数：8
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