Atmospheric Activity Concentration of 90Sr and 137Cs after the Fukushima Daiichi Nuclear Accident

被引：18

作者：

Zhang, Zijian ^{[1
]}

Ninomiya, Kazuhiko ^{[1
]}

Yamaguchi, Yoshiaki ^{[2
]}

Kita, Kazuyuki ^{[3
]}

Tsuruta, Haruo ^{[4
]}

Igarashi, Yasuhito ^{[5
]}

Shinohara, Atsushi ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Sci, 1-1 Machikaneyama, Toyonaka, Osaka 5600043, Japan

[2] Osaka Univ, Radioisotope Res Ctr, 2-4 Yamadaoka, Suita, Osaka 5650871, Japan

[3] Ibaraki Univ, Coll Sci, 2-1-1 Bunkyo, Mito, Ibaraki 3108512, Japan

[4] Remote Sensing Technol Ctr Japan, Minato Ku, 3-17-1Toranomon, Tokyo 1050001, Japan

[5] Meteorol Res Inst, 1-1 Nagamine, Tsukuba, Ibaraki 3050052, Japan

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2018年 / 52卷 / 17期

基金：

日本学术振兴会;

关键词：

POWER-PLANT ACCIDENT; JAPAN; RADIONUCLIDES; DEPOSITION; RESUSPENSION; RADIOCESIUM; BEHAVIOR; AEROSOL; SR-89; AIR;

D O I：

10.1021/acs.est.8b01697

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

On March 11, 2011, the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident occurred and large amounts of radionuclides were discharged into the atmosphere. We have operated continuous aerosol samplings at four locations in Japan from the accident until the end of 2011. The activities of Sr-90 and Cs-137 in the aerosol samples were measured using low background liquid scintillation counters and high-purity germanium detectors, respectively. The atmospheric 90Sr and 137Cs concentrations decreased exponentially during 2011. The time variation of the Sr-90/Cs-137 ratio was obtained, and we found that the ratio rose from 1.2 X 10(-3) in March to 1.3 X 10(-1) in August 2011. One reason for the increase in the Sr-90/Cs-137 ratio could be the change in the primary emission source of activity at the FDNPP, which occurred near June 2011.

引用

页码：9917 / 9925

页数：9

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