The radioactive environment of a decommissioned uranium mine in Jiangxi province was investigated and analyzed. The pollutant sources of the mine and decommissioning management projects were determined. The results show that all the radon exhalation rates of five waste rock heaps exceed 0.74 Bq/(m²·s), moreover, the content of natural uranium and ²²⁶Ra in waste rocks are higher than local background value. The soils of yard and roads are polluted to varying degrees. The content of natural uranium in effluents sampled from four pits are higher than the emission limits of 0.3 mg/L, however, the effluents can reach the emission standard after being treated. The α and β surface contamination level of equipment, pipeline and facilities are all in high level. The value of public maximum individual effective dose contributed by this decommissioned uranium mine before treatment is 5.94×10^-4 mSv/a.

decommissioned uranium mine  /  radioactive environment  /  pollutant source  /  radioactive nuclides  /  emission limits