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Radiation Protection Dosimetry Advance Access originally published online on August 25, 2006
Radiation Protection Dosimetry 2007 123(2):171-181; doi:10.1093/rpd/ncl106
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Evaluation of aerosol sizing characteristic of an impactor using imaging plate technique

Naureen Mahbub Rahman1,*, Takao Iida1, Fumihiro Saito2, Jun Koarashi3, Keizou Yamasaki4, Hiromi Yamazawa1 and Jun Moriizumi1

1 Energy Environmental Safety Engineering Laboratory, Department of Energy Engineering and Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603 Japan
2 Facility Radiation Control Section, Radiation Protection Department, Nuclear Science Research Institute, Tokai Research and Development Center, Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
3 Radiation Protection Department, Nuclear Fuel Cycle Engineering Laboratories, Tokai Research and Development Center, Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki 319-1194, Japan
4 Research Reactor Institute, Kyoto University, Noda, Kumatori-cho, Sennan-gun, Osaka, 590-0494, Japan

* Corresponding author: urmirahman244{at}yahoo.com, naureen{at}nucl.nagoya-u.ac.jp

Received February 14, 2006, amended July 14, 2006, accepted July 21, 2006


  Abstract

The activity-size distribution of radon decay products are normally determined using two approaches: direct and indirect. The present study utilises the direct approach to evaluate sizing information of a low pressure cascade impactor using imaging plate (IP) technique for radon decay products. The experiment verified the use of the collection media as suggested by the manufacturer of impactor and proposed a few improvements toward sizing characteristics of impactor. The obtained relative activity-size distribution of radon decay products presents a sharp unimodal log-normal distribution of the particle characterised by activity median aerodynamic diameter (AMAD) of 268 nm and geometric standard deviation ({sigma}g) of 1.66. The obtained data with all the suggested improvements were evaluated by the data obtained from a scanning mobility particle sizer (SMPS, Model 3934, TSI Inc), as reference data. The verification lead to a derivative area ratio of 0.803 between the reference and experimental data.


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