【摘要】 采用双滤膜筒测氡、抽气三段法测氡子体的方法,测得上海市区地下建筑物内氡及其子体（RaA、RaB和RaC）浓度分别为80.6Bq·m^-3和48.8Bq·m^-3、47.9Bq·m^-3、34.0Bq·m^-3。计算得氡子体潜能和平衡因子分别为 11.3×10^-3WL和 0.43。估算了地下建筑内作业人员接受地下室氡子体人均年有效剂量当量为1.24mSv。讨论了地下建筑降低氡浓度的防护措施。更多还原

【Abstract】 The concentration of radon and its progenies was surveyed by using the two - filter method and the three - phase total alpha measurement respectively. The concentrations of radon and its progenies (RaA, RaB and RaC)in some underground buildings in Shanghai were found to be 80. 6,48. 8.47. 9 and 34. 0Bq · m-3, respectively. The potential energy and equivalent equilibrium factor of radon progenies were 11. 3×10-3WL and 0. 43 respectively. It was also evaluated that the annual effective equivalent dose from radon progenies inhaled by people living in these underground buildings was 1. 24mSv. Finally, measures for lowering the level of radon and its progenies in underground buildings were discussed.更多还原