北仑港进口铁矿石放射性水平研究

Study on the Radioactive Level of Iron Ore Imported via Beilun Port

通过对堆放在北仑港口的进口铁矿石进行放射性水平测量,研究了北仑港口进口铁矿石的放射性污染状况。结果表明:北仑港进口铁矿石堆场附近居民人均年接受γ辐射有效剂量当量为0.15mSv/a,工作人员年接受γ辐射有效剂量当量为0.21mSv/a,均在国家建材标准要求控制的标准以下;氡污染水平较低,接近环境本底水平值。

The radioactive pollution of iron ore imported via Beilun Port was studied by measuring the imported iron ore deposited at Beilun Port. The result indicates that the average annual effective dose equivalent of γ, irradiation is 0.15 mSv/a for the nearby residents of the imported iron ore yard and 0.21 mSv/a to the workers involved, which both are below the national standard for building materials. Its radon pollution is low, near to the environment background value.