【摘要】 利用活性炭干冰冷却吸附法测定了某铀矿170名坑龄1 a 以上的不同工种的井下作业工人和33名无井下作业史的工人呼出气中的²²²Rn 浓度,并由此估算了他们体内²²⁶Ra 的负荷量。铀矿工呼出气中氡浓度和体内²²⁶Ra 的负荷量的最大值分别为16.2 Bq·m^-3和1.65 kBq。同时对可能影响矿工体内²²⁶Ra 负荷量的各种因素进行了调查,通过逐步回归分析,得到矿工体内²²⁶Ra 的负荷量 y（Bq）与氡子体累积暴露量 x（WLM）回归方程为 y=81.72+1.51x。更多还原

【Abstract】 The concentrations of Rn in exhaled breath were measured for 170 underground minerswith working experience more than one year and 33 controls in a uranium mine.From suchmeasurements their ²²⁶Ra body burdens were estimated.The maximum of the Radon concentration inexhaled breath and ²²⁶Ra body burden for miners was 16.2 Bq·m^-3 and 1.65 kBq,respectively.Analysing the factors that influenced the ²²⁶Ra body burden,we found that the ²²⁶Ra body burden waspositively correlated with the cumulative radon daughter exposure level,and the regression equationwas y=81.72+1.51x.更多还原