| Abstract: | A plan of surveillance monitoring Qinshan Nuclear Power Plant (QNPP) has been implemented since 1992, the objective of which is to establish the database of environmental radiation information around QNPP, and to detect any unplanned discharge of radioactive materials from QNPP. This paper presents the nonitoring results for radionuclide concentrations in the environmental matrices before and after QNPP operation. The radionuclide concentrations in vegetation, food, atmosphere, soil and littoral soil samples have been determined. After operation of QNPP, the mean values of 137Cs, 90Sr and 3H in water are 0.6, 4.9 mBq/L and 1.7 Bq/L, respectively; the mean values of 137Cs in soil and littoral soil are 3.5 and 2.7 Bq/kg, respectively; the mean values of 137Cs in rice, green cabbage,meat, mullet, milk and tea are 0.033, 0.039, 0.081, 0.069, 0.018 and 0.62 Bq/kg, respectively: the mean values of 90Sr in rice, green cabbage and tea are 0.081, 0.315 and 4.1 Bq/kg, respectively: gross β activity in fallout is 0.9 Bq.m-2.d-1. Compared with the data before QNPP's operation, no significant difference has heen observed in the radioactivity of 137Cs, 90Sr, 3H and the gross β activity in ambient environmental matrices from 1992 to 2001, and there are only some fluctuations within the range of background. |
