论文部分内容阅读
目的通过对某铀矿山井下作业职业病危害因素及职业辐射防护效果进行评价,并提出有效的防护对策和建议。方法依据国家有关辐射防护标准,采用理论计算法、类比调查法和经验法,对铀矿山井下作业场所中可能存在的辐射源项进行识别,并根据设计参数对辐射源项进行定量分析与评价。结果铀矿山井下存在氡及其子体所致工作人员计量为4.23 mSv/年;井下人员γ外照射年剂量最大值为4.22 mSv/年;吸入放射性粉尘所致的待积有效剂量为3.44 mSv/年。在正常生产条件下,作业人员所受的辐射年有效剂量预计为11.89 mSv,可以控制在目标管理值范围内。结论本项目属于严重职业病危害项目。从职业病防治角度分析,项目建设可行。
Objective To evaluate occupational hazards and occupational radiation protection effectiveness of underground uranium mines and propose effective countermeasures and suggestions for protection. Methods Based on the relevant national standards for radiation protection, theoretical calculations, analogy surveys and empirical methods were used to identify potential radiation source items in downhole workplace of uranium mines. The radiation source items were quantitatively analyzed and evaluated according to design parameters. Results The staffing of radon and its daughters in the underground of uranium mines was 4.23 mSv per year; the maximum annual dose of γ radiation by underground personnel was 4.22 mSv per year; the effective dose to be absorbed by radioactive dust inhalation was 3.44 mSv / year. Under normal production conditions, the effective annual dose of radiation received by workers is estimated to be 11.89 mSv, which can be controlled within the target management values. Conclusion This project is a serious occupational hazard project. From the perspective of occupational disease prevention and control, the project is feasible.