放射性工作场所气溶胶浓度与粒径分布

Measurement of concentration and size distribution of aerosols in different radiation work places

目的:研究部分放射性工作场所内气溶胶的浓度和粒径分布特性。方法:在数类典型放射性工作场所,用TSI 3321APS进行气溶胶浓度和粒径分布的测量。结果:各调查场所的计数中位径均在0.7μm左右,除核电站乏燃料暂存池外,质量中位径均在1.0μm左右。放射性丙级操作室气溶胶的个数浓度和质量浓度最高。结论:气溶胶浓度与工作场所及人员活动关系密切,测量所建立的基线数据可为内照射剂量评价提供参考。

Objective：To explore the general characteristics of the concentration and size distribution of aerosols in several typical radiation work places. Methods：In different types of radiation work places, the number and mass concentration together with the number and mass particle size distribution of aerosols were measured by TSI 3321 APS. Results：The number median diameter distribution were averaged to be 0.7 μm for the whole surveyed places, while the mass median diameter of particle size distribution were around 1.0 μm, except for temporary storage pools of spent fuel rods at nuclear power plants. Both number and mass concentration in the room of processing unsealed radioactive source of C level were the highest. Conclusions：Concentration of aerosols varied with different work places and human activities significantly. The benchmark data established in this work may be useful when considering the dose contribution from inhaled radioactive particles.