某铀矿山废石堆场氡污染调查

摘要

通过对某铀矿山11个废石堆场氡析出率和大气氡浓度的测量及氡所致年有效剂量估算表明,该矿山正在使用的废石堆场氡析出率值均超出了国家规定的管理限值水平,只有退役治理后的废石堆场氡析出率在管理限值以内;矿山废石堆场产生的大气氡浓度值为72.35 Bq/m3,其所致的年有效剂量值为0.69 mSv.%In this paper,the radon exhalation rate and radon concentration on 11 waste dumps of a uranium mine were measured,and the annual effective dose caused by radon was calculated.The results showed that the radon exhalation rate value measured on the waste dump in use was beyond the limit prescribed by the state management level,only the value on the remediated decommission waste dump was lower than the management limit.At the same time,the average atmospheric radon concentration above the waste dump was 72.35 Bq/m3,and its annual effective dose was 0.69 mSv.