The radioactivity of investigation, analysis and evaluation of liquid effluent such as mine water, tailings pond effluent and process wastewater produced by a uranium mine were conducted, the radioactivity level of liquid effluent and the pollution of accepted water were mastered, and the radiation impact of liquid effluent on local residents through various pollution channels was evaluated. The results show that the discharge concentrations of U, ²²⁶Ra, ²¹⁰Pb and ²¹⁰Po in the mine water, process wastewater and tailings pond effluent meet the limit requirements. The concentration of U in the middle and lower reaches of the accepted water body is slightly higher than the background level, and the concentrations of ²²⁶Ra, ²¹⁰Pb and ²¹⁰Po are among the normal background levels. The maximum personal dose caused by liquid effluent from uranium mine was 1.45×10^-3 mSv/a of 20 km, and the maximum collective effective dose was 2.35×10^-4 man·Sv/a of 20 km. The key resident group was the population group of WNW orientation in the >2~5 km area. The liquid effluent of uranium mining is discharged into the receiving water after reaching the standard, which has little impact on local radiation.

uranium mine  /  liquid effluent  /  radioactivity  /  mine water  /  tailings pond effluent  /  process wastewater  /  investigation  /  evaluation