铀尾矿库退役治理有关氡析出率问题的探讨

就铀矿冶设施退役环境治理过程中涉及铀尾矿库中的大面积铀尾矿氡析出率的测量、计算及用覆盖方法控制氡析出率的有关问题进行了探讨。提出了大面积铀尾矿年平均氡析出率测量中应考虑选择合适的测量时间、布点网度、测量次数等，以消除由于气象因素、尾矿中镭质量分数的不均匀等对氡析出率测量带来的影响。指出比较经济、衫的控制氡析出率的方法是用土壤、砂砾石等天然材料进行覆盖，并对确定覆盖厚度的方法进行了现场试验及理论计算的比较与说明。

STUDY ON RADON EDUCTION RATE FOR REMEDIATION AND DECOMMISSIONING OF URANIUM TAILINGS IMPOUNDMENT

This paper studies the measurement,calculation of radon eduction rate and the control to radon eduction rate by covering some material in big area of tailings for remediation and decommissioning of uranium tailings impoundment.In order to eliminate the effect on the measurement of radon eduction rate by the weather and the inhomogeneous radium content of tailings,the suitable measuring time,network and times should be considered in the measurement of the average annual radon eduction rate of uranium tailings.It is proposed that the better economic and social benefits will be obtained with natural meterial (soil, gravel etc) as cover material to reduce radon eduction rate.The author describes how to determine the cover thickness by comparing the results in site test with that in calculation.