Estimation of the front-to-total activity ratio for wire screens using CFD simulation.
Wire screens are widely used for sampling radioactive aerosols. The front-to-total activity ratio is a critical factor in describing the self-shielding effect of the wire screens. In this study, computational fluid dynamic method was applied to simulate the deposition of aerosols on the surface of the wire screens. Four different types of screens were investigated for particle size varying from 1 nm to 10 µm. Experimental verification was carried out in a radon chamber. The results showed good agreement between experimental data interception and the simulation. Significant differences on the front-to-total activity ratio for the different types of screens were observed when the size of particle was <20 nm.
Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai, China.
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B
Chen
Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai, China whzhuo@fudan.edu.cn.
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W
Zhuo
D061808:Air Filters; D000396:Air Pollutants, Radioactive / Q000032:analysis*; D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008962:Models, Theoretical; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D011886:Radon / Q000032:analysis*; D015203:Reproducibility of Results; D012212:Rheology / Q000295:instrumentation / Q000379:methods; D012680:Sensitivity and Specificity; D013048:Specimen Handling / Q000295:instrumentation*
D000396:Air Pollutants, Radioactive; D011886:Radon