Evaluation of the effect of media velocity on filter efficiency and most penetrating particle size of nuclear grade high-efficiency particulate air filters

Journal of Occupational and Environmental Hygiene
Steven L AldermanCharles A Waggoner

Abstract

High-efficiency particulate air (HEPA) filters are widely used to control particulate matter emissions from processes that involve management or treatment of radioactive materials. Section FC of the American Society of Mechanical Engineers AG-1 Code on Nuclear Air and Gas Treatment currently restricts media velocity to a maximum of 2.5 cm/sec in any application where this standard is invoked. There is some desire to eliminate or increase this media velocity limit. A concern is that increasing media velocity will result in higher emissions of ultrafine particles; thus, it is unlikely that higher media velocities will be allowed without data to demonstrate the effect of media velocity on removal of ultrafine particles. In this study, the performance of nuclear grade HEPA filters, with respect to filter efficiency and most penetrating particle size, was evaluated as a function of media velocity. Deep-pleat nuclear grade HEPA filters (31 cm x 31 cm x 29 cm) were evaluated at media velocities ranging from 2.0 to 4.5 cm/sec using a potassium chloride aerosol challenge having a particle size distribution centered near the HEPA filter most penetrating particle size. Filters were challenged under two distinct mass loading rate regimes t...Continue Reading

References

Jul 1, 1969·American Industrial Hygiene Association Journal·D Rimberg
Dec 5, 2000·Environmental Health Perspectives·A ZanobettiD W Dockery
Sep 4, 2007·The Review of Scientific Instruments·R ArunkumarCharles A Waggoner

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Citations

Nov 7, 2012·The Review of Scientific Instruments·Paxton K GiffinCharles A Waggoner
Feb 9, 2012·International Journal of Microbiology·Pratima GuptaAvinash Sahu
Sep 13, 2020·International Journal of Hygiene and Environmental Health·Weixing HaoYang Wang

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Methods Mentioned

BETA
filter collection

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