Quantitative evaluation of 218Po behaviour in air in an artificial environment.
Experiments were carried out in a small enclosed booth for the purpose of understanding and modelling (218)Po behaviour. The experiment was conducted under two kinds of conditions without and with injection of incense smoke. A working model of (218)Po behaviour was applied to analyse the measured data. Under the condition without incense smoke, temporal changes in aerosol-attached and unattached (218)Po concentrations were successfully reproduced by the model. The deposition rate of unattached fraction and the rate of attachment were determined by the working model. Under the condition with incense smoke, temporal changes in (218)Po concentration were poorly simulated by the model. This can be attributed to the significantly increased aerosol concentration in small size ranges which is not properly considered in the attachment rate calculation in the model.
Department of Energy Engineering and Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan yajima.kanako@b.mbox.nagoya-u.ac.jp.
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Yajima
Department of Energy Engineering and Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
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Hirao
Department of Energy Engineering and Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
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Moriizumi
Department of Energy Engineering and Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
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Yamazawa
D000336:Aerosols / Q000032:analysis* / Q000737:chemistry*; D000388:Air / Q000032:analysis*; D000392:Air Movements; D000396:Air Pollutants, Radioactive / Q000032:analysis* / Q000737:chemistry; D004780:Environment, Controlled; D010316:Particle Size; D011059:Polonium / Q000032:analysis* / Q000737:chemistry; D011834:Radiation Monitoring / Q000379:methods; D011886:Radon / Q000032:analysis*
D000336:Aerosols; D000396:Air Pollutants, Radioactive; D011059:Polonium; D011886:Radon