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目的探讨核电站正常运行期间原子质量为210的钋(210Po)在周围海域贝壳类生物中的残留情况,为核电站周围居民健康评价提供依据。方法 2013—2014年以大亚湾1号核岛为圆心,按照不同距离、不同介质(海水、海底泥、贝壳类)进行采样,采用银片自沉积法检测样品中210Po的含量。结果 210Po的含量:贝肉为0.08 Bq/kg,贝壳为2.33 Bq/kg,海水为0.08Bq/kg,海底泥为17.36 Bq/kg;贝肉与贝壳、贝壳与海水中210Po含量差异均有统计学意义(t=6.782,2.725,均P<0.05)。海域不同介质中210Po含量与核电站的距离无关。结论贝壳对210Po有蓄集作用,其危害有待进一步探讨。
Objective To investigate the residual value of 210Po in shellfish in the surrounding sea area during the normal operation of nuclear power station and provide the basis for the health evaluation of residents around the nuclear power station. Methods Samples from Dayu Bay No. 1 nuclear island at different distances and different media (seawater, seabed mud and shellfish) were collected from 2013 to 2014, and the content of 210Po in the samples was detected by silver plate self-deposition method. Results The contents of 210Po were: 0.08 Bq / kg for shellfish, 2.33 Bq / kg for shellfish, 0.08 Bq / kg for seawater and 17.36 Bq / kg for seabed mud; 210Po content in shellfish, shell and seawater were statistically different Significance (t = 6.782,2.725, all P <0.05). 210Po content in different media in the sea has nothing to do with the distance of nuclear power station. Conclusion Shells have 210Po accumulation, its harm needs further study.