An occupational radon assessment was conducted at five underground storage facilities in the Kingdom of Saudi Arabia to evaluate the radon concentration and determine if remedial action is required to ameliorate conditions and ensure compliance with international guidance on acceptable radon levels in working environments. The assessment was carried out in four operational areas in the underground storage facilities routinely occupied or visited by workers. Initial radon concentrations were obtained using 293 passive CR-39 Nuclear Track Detector (NTD) radon dosimeters installed in the four operational areas for all the underground storage facilities. The detectors were left in place for 12 mo. As some of the radon measurements exceeded the International Atomic Energy Agency reference level of 1,000 Bq m-3 for radon in workplaces, a follow-up assessment was conducted using a real-time monitoring device in locations where high radon levels were observed. The measured radon concentrations in the four operational areas in three of the five underground storage facilities were below the reference level, and in the remaining two storage facilities, low ventilation rates in one operational area were identified as the principal cause of elevated radon concentrations. Notwithstanding, the potential radiation dose from radon exposure was determined to be well below the International Commission on Radiation Protection reference annual dose level of 10 mSv in all five underground storage facilities. Radon exposure to workers in all the underground storage facilities was found to be within the reference dose level for workplaces and does not pose an acute health risk.

中文翻译：

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沙特阿拉伯地下储存设施的职业氡气评估。

对沙特阿拉伯王国的五个地下储存设施进行了职业氡气评估，以评估氡气浓度，并确定是否需要采取补救措施来改善条件并确保遵守有关工作环境中可接受的氡气水平的国际指南。此次评估是在工人经常使用或访问的地下储存设施的四个操作区域进行的。使用安装在所有地下储存设施的四个作业区域中的 293 个无源 CR-39 核径迹探测器 (NTD) 氡剂量计获得初始氡浓度。探测器放置 12 个月。由于部分氡气测量值超过国际原子能机构工作场所氡气参考水平1,000 Bq m-3，因此在观测到高氡气水平的地点使用实时监测装置进行了跟踪评估。五个地下储存设施中，三个储存设施的四个操作区域的测得氡气浓度低于参考水平，而在其余两个储存设施中，一个操作区域的低通风率被确定为氡气浓度升高的主要原因。尽管如此，经确定，所有五个地下储存设施中氡暴露的潜在辐射剂量远低于国际辐射防护委员会参考的年剂量水平 10 毫西弗。研究发现，所有地下储存设施中工作人员的氡暴露均在工作场所参考剂量水平之内，不会构成严重的健康风险。