Otahal P P S, Burian I, Ondracek J, Zdimal V, Holub R F
National Institute for NBC Protection, Kamenna 71, 26231 Milin, Czech Republic.
Laboratory of Aerosols Chemistry and Physics, Institute of Chemical Process Fundamentals of the CAS, v.v.i. Rozvojova 135/1, 165 00 Praha, Czech Republic.
Radiat Prot Dosimetry. 2017 Nov 1;177(1-2):53-56. doi: 10.1093/rpd/ncx157.
The activity size distribution of the Equilibrium-Equivalent Concentration (EER) of 222Rn is one of the most important parameters for the estimation of radiation dose by inhalation of radon decay products. A series of measurements of the EER activity size distribution were performed by the screen diffusion battery in Radon-Aerosol chamber (10 m3) at the National Institute for Nuclear, Chemical, and Biological Protection (SUJCHBO). These measurements were performed at different levels of radon concentration. For this study, the Graded Screen Array Diffusion Battery (GSA DB), developed by the SUJCHBO (based on Earl Knutson and Robert F Holub design), consists of 10 screens and backup filter used to collect all particles that penetrated the screens. The measuring range of this GSA DB allows measuring the radioactive nanoaerosols in the size range from 0.5 to 100 nm. The Earl Knutson algorithm was used for EER activity size distribution evaluation. The results of EER activity size distribution were subsequently compared with the aerosol particle size distribution measured by Scanning Mobility Particle Sizer Spectrometer (SMPS 3936 N, TSI Inc., MN, USA).
222Rn平衡等效浓度（EER）的活度粒径分布是通过吸入氡衰变产物估算辐射剂量的最重要参数之一。国立核、化学和生物防护研究所（SUJCHBO）在氡 - 气溶胶室（10立方米）中使用筛网扩散电池对EER活度粒径分布进行了一系列测量。这些测量在不同的氡浓度水平下进行。在本研究中，由SUJCHBO开发的分级筛网阵列扩散电池（GSA DB，基于厄尔·克努森和罗伯特·F·霍卢布的设计）由10个筛网和备用过滤器组成，用于收集穿透筛网的所有颗粒。该GSA DB的测量范围允许测量尺寸范围从0.5到100纳米的放射性纳米气溶胶。使用厄尔·克努森算法评估EER活度粒径分布。随后将EER活度粒径分布的结果与通过扫描迁移率粒径谱仪（SMPS 3936 N，美国明尼苏达州TSI公司）测量的气溶胶粒径分布进行比较。
