Radiation Safety Management
Online ISSN : 1884-9520
Print ISSN : 1347-1511
Volume 15
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Papers
  • Masaya TSUJIMOTO, Sunao MIYASHITA, Hai T. NGUYEN, Satoru NAKASHIMA
    2016 Volume 15 Pages 1-8
    Published: 2016
    Released: April 12, 2016
    JOURNALS FREE ACCESS
     The transfer factors (TFs) from paddy soil to rice plants of radioactive cesium (137Cs and 134Cs) derived from Fukushima Daiichi Nuclear Power Plant (FDNPP) accidents in March, 2011 and grain size distributions were estimated in four paddy fields, A through D, in Fukushima City. Soil and rice samples were obtained in September, 2014. The soil was measured for 137Cs and 134Cs radioactivity by Ge semiconductor detector and separated by the dry sieving classification. The radioactivity of radioactive cesium in the soil was comparatively higher in fields C and D (> 4000 Bq/kg), but the TF in field B was the highest (1.9E-03) among the four fields. Meanwhile, the soil in fields A and B contained a relatively large amount of larger grains, such as medium sand. Grain size distribution might be related to the TF. This study shows a new correlation between the grain size distribution and TF.
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