Thoughts on the prevention and regulation on radioactive occupational hazards in Chinese non-uranium mines

Non-uranium mines refer to mines whose main purpose is not to produce uranium. In China, the level of radon pollution in some non-uranium mines is high. And the annual effective dose caused by radon is close to or exceeds the annual effective dose limit for occupational radiation worker. However, there is still no specific regulations on the prevention of radioactive occupational hazards in non-uranium mines. In this paper, some key problems such as the prevention and control emphasis of radioactive occupational hazards in non-uranium mines, the determination of dose constraint values of radon in the workplace of non-uranium mines is discussed, and the corresponding countermeasures and suggestions are proposed. (authors)