el-Hady M A, Mohammed A, el-Hussein A, Ali A E, Ahmed A A
Physics Department, Faculty of Science, EL-Minia University, EL-Minia, Egypt.
Radiat Prot Dosimetry. 2001;95(1):63-8. doi: 10.1093/oxfordjournals.rpd.a006526.
In addition to the workers in uranium mines, the staff of other underground mines, such as workers in underground phosphate mines, can be exposed to 222Rn and its progeny. In this study the individual radon progeny concentrations were measured in three Egyptian underground phosphate mines to estimate the occupational exposure of the workers at those sites. A filter method was used to measure individual radon progeny concentrations (218Po, 214Pb and 214Po). The reported mean values of radon progeny concentrations exceed the action levels which are recommended by ICRP 65 (1993). Based on the measured individual radon progeny concentrations (218Po, 214Pb and 214Po) in these mines, the annual effective dose for the workers has been calculated using the lung dose model of ICRP 66 (1994). According to the obtained results, some countermeasures were recommended in this study to minimise these exposure levels.
除了铀矿工人外，其他地下矿山的工作人员，如地下磷矿工人，也可能接触到222Rn及其子体。在本研究中，对埃及的三个地下磷矿中的个体氡子体浓度进行了测量，以估算这些场所工人的职业照射情况。采用滤膜法测量个体氡子体浓度（218Po、214Pb和214Po）。所报告的氡子体浓度平均值超过了国际放射防护委员会（ICRP）65号出版物（1993年）推荐的行动水平。根据这些矿山中测量的个体氡子体浓度（218Po、214Pb和214Po），利用ICRP 66号出版物（1994年）的肺部剂量模型计算了工人的年有效剂量。根据所得结果，本研究推荐了一些对策以尽量降低这些照射水平。
