Kojo Katja, Laine Jussi-Pekka, Turtiainen Tuukka, Kurttio Päivi
Environmental Radiation Surveillance, Radiation and Nuclear Safety Authority, Helsinki, Finland.
J Radiol Prot. 2021 Sep 28;41(4). doi: 10.1088/1361-6498/ac08f0.
Radon measurements in Finnish underground mines were started in 1972. Since 1992, regular radon inspections by the competent authority have been carried out in all underground mines. During these inspections, several grab samples are taken from the air, which are later measured in the laboratory. This is a follow-up survey of radon concentrations in the air of the underground mines. The average radon concentrations in the mines between the years 2011 and 2019 varied from 90 to 1100 Bq m. Overall, the occupational radon exposure in the Finnish underground mines has remained at a low level from the 1990s onwards. In recent years, high radon concentrations have been observed only in those mines where active mining has ceased. Compared to other recent studies in mines in other countries, radon concentrations in Finnish mines are approximately at the same level. Uncertainties relating to infrequent grab sampling have been recognised and the authority is now testing personal radon detectors that may be used for the exposure assessment in the future.
芬兰地下矿井的氡气测量始于1972年。自1992年以来，主管当局对所有地下矿井进行定期氡气检查。在这些检查期间，从空气中采集多个 grab 样本，随后在实验室进行测量。这是对地下矿井空气中氡浓度的后续调查。2011年至2019年期间，矿井中的平均氡浓度在90至1100贝克勒尔每立方米之间变化。总体而言，自20世纪90年代以来，芬兰地下矿井的职业性氡暴露一直处于低水平。近年来，仅在那些已停止活跃开采的矿井中观察到高氡浓度。与其他国家近期对矿井的其他研究相比，芬兰矿井中的氡浓度大致处于相同水平。已认识到与不频繁 grab 采样相关的不确定性，当局目前正在测试未来可用于暴露评估的个人氡探测器。
