Distribution of artificial radionuclides (110mAg, 129mTe, 134Cs, 137Cs) in surface soils from Miyagi Prefecture, northeast Japan, following the 2011 Fukushima Dai-ichi nuclear power plant accident

Copyright © 2012 by The Geochemical Society of Japan. that the power plant released approximately 3.5 × 1016 Bq of 137Cs following the accident. Radionuclides from the power plant were dispersed in the air and ocean and deposited on land (Yasunari et al., 2011; Gudelis et al., 2012; Honda et al., 2012; Xiong et al., 2012). 134Cs and 137Cs were transported from the power plant to Taiwan (up to ~1.5 × 10–13 Bq/m3 in aerosol samples; Huh et al., 2011), and airborne radionuclides were detected in Europe from March 22, 2011 (Masson et al., 2011; Beresford et al., 2012). Morino et al. (2011) reported that approximately 22% of the 137Cs emitted from the power plant was deposited in Japan in March 2011. The Japanese Government reported the radionuclide activity concentrations in soils (0–5 cm depth) collected from Fukushima and southern Miyagi Prefecture (within a 100-km radius of the power plant) following the accident (MEXT, 2011a). On April 28, 2011, relatively high 134Cs and 137Cs activity concentrations (up to 8800 and 9400 Bq/kg, respectively; Kato et al., 2012) were found in the upperDistribution of artificial radionuclides (110mAg, 129mTe, 134Cs, 137Cs) in surface soils from Miyagi Prefecture, northeast Japan, following the 2011 Fukushima Dai-ichi nuclear power plant accident

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