Measurement of U-238, Ra-228, Ra-226, K-40 and Cs-137 in foodstuffs samples collected from coastal areas of China

摘要

This study represents a total of 245 samples collected. The activities of (238)u, Ra-228, Ra-226, K-40 and Cs-137 were determined in samples of vegetables, tea, cereal (rice, wheat and corn), meat, poultry, freshwater product, seafood and seaweed that collected from the 30 km safety zone of the Nuclear Power Plants (NPPs) area. All the samples radionuclide activities were quantified by using High Purity Germanium (HPGe) gamma spectrometry. The geometric mean concentrations (Bq kg(-1) wet weight) for U-238, Ra-228, Ra-226, K-40, and Cs-137 in all investigated foodstuffs samples, are 0.13, 0.16, 0.11, 68 and 0.02, respectively. The arithmetic mean concentrations (Bq kg(-1) wet weight) for U-238, Ra-228, Ra-226, K-40, and Cs-137 in all investigated foodstuffs samples, are 0.34, 0.65, 0.32,111 and 0.09, respectively. Results of this study were compared with others, the measured values are the same with those of a previous investigation. Radiation doses due to the consumption of these foodstuffs to humans are estimated to comprise around 37-46% of the annual dose limit for public. (C) 2016 Elsevier Ltd. All rights reserved.