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| Effects of Fukushima Nuclear Accident on Activity Concentration of Cesium -134 and Cesium -137 of Marine Prod-ucts in Shandong |
| CHEN Ying-min, XU Jiaang, MIN Nan, WANG Lei, CHEN Rui |
| Institute of Radiation Medicine, Shandong Academy of Medicine Sciences, Jinan 250062 China |
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Abstract Objective To investigate radioactivity levels in coastal seafood in Shandong after the March 2011 Fukushima nuclear accident,and to study the radioactive effects on seafood in coastal areas of Shandong.Methods Sample collection and pretreatment were carried out according to the method of "Examination of Radioactive Materials for Foods-General Principle "(GB 14883.1-94). The samples of marine products were measured according to "Gamma Spectrometry Methed of Analysing Radionuclides in Biological Samples" (GB/T 16145-1995).The committed aborbed dose are estimated for residents receiving seafood according to "Basic Standards for Protection Against Ionizing Radiation and for the Safety of Radiation Sources" (GB 18871-2002).Results We collected 3 samples for each class in Yantai, Qingdao and Weihai of shandong,such as squillid of crustaceans, wahoo of fish,cuttlefish of mollusks class,kelp of plants category and clam of shellfish.The artificial nuclide cesium-137 was detected in each sample of squillid and wahoo in Yantai, Qingdao and Weihai,and cesium-137 was not detected in the other samples. Cesium-134 was not detected in all samples.The results showed that,squillid and wahoo,the activity concentration of cesium-137 ranged from 0.016 Bq/kg to 0.026 Bq/kg and from 0.051 Bq/kg to 0.096 Bq/kg, respectively.The annual equivalent effective doses derived from squillid and wahoo ingestion are 3.9×10-6mSv and 2.7×10-5mSv, respectively.Conclusion March 2011 Fukushima nuclear acciden did not cause the marine products to be polluted by radionuclide in coastal areas of Shandong.The annual equivalent effective dose derived from the marine products ingestion was at a safe level.
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Received: 25 November 2016
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