新疆伴生放射性矿开发利用中的放射性水平调查与评价

Investigation and Evaluation of Radioactivity Level in Exploitation and Utilization of Associated Radioactive Ore in Xinjiang

围绕新疆境内10余类1095家矿产资源的开发利用企业展开调查,对超出“当地本底水平+150nGy/h”的14家企业进行采样,调查和测量了固体物料和固体废物样品中放射性核素含量。结果表明:原料与产品中,煤矿的放射性水平偏高,^(238)U、^(226)Ra、^(232)Th任一核素比活度大于1000 Bq/kg;固体废物中,煤矿和铁矿行业放射性水平偏高,^(238)U、^(226)Ra、^(232)Th任一核素比活度大于1000 Bq/kg。在固体废物中,^(238)U、^(226)Ra的放射性水平分别有不同程度的富集。

An investigation was carried out around 1095 enterprises in the exploitation and utilization of mineral resources in more than 10 categories in Xinjiang,and 14 enterprises which exceeded the“local background level+150n Gy/h”were sampled.The radionuclide contents in solid materials and solid waste samples were investigated and measured.The results showed that the radioactivity level of coal mine was higher than 1000Bq/kg,and the specific activity of any nuclide of ^(238)U,^(226)Ra and232Th was higher than 1000 Bq/kg.The level of radioactivity in coal and iron mines was high in solid waste,and the specific activity of any nuclide of ^(238)U,^(226)Ra and ^(232)Th was greater than 1000 Bq/kg.The levels of ^(238)U and ^(226)Ra are enriched in different solid wastes.