Analysis of the influence on environmental radiation level of Qinshan area caused by Fukushima nuclear accident

In order to monitor the diffusion and deposition of radioactive plume in Qinshan area after Fukushima nuclear accident, a continuous air sampling was did from March 25 to May 6. A trace of ¹³⁴Cs and ¹³¹I were detected in the period. Results of conventional environmental radiation monitoring also showed that the specific activity of ⁹⁰Sr and ¹³⁷Cs in environmental samples had some abnormal changes in 2011 which almost felt back to normal level in 2012. Although there is no abnormal change on environmental radiation level of Qinshan area till now, the influence caused by Fukushima nuclear accident should be paid continuously attention in future by radiation monitoring. (authors)