Size Measurement of Radioactive Aerosol Particles in Intense Radiation Fields Using Wire Screens and Imaging Plates

Oki, Yuichi; Tanaka, Toru; Takamiya, Koichi; Osada, Naoyuki; Nitta, Shinnosuke; Ishi, Yoshihiro; Uesugi, Tomonori; Kuriyama, Yasutoshi; Sakamoto, Masaaki; Ohtsuki, Tsutomu

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자료유형: 학술저널

저자정보: Oki, Yuichi (Kyoto University Research Reactor Institute) Tanaka, Toru (Graduate School of Engineering, Kyoto University) Takamiya, Koichi (Kyoto University Research Reactor Institute) Osada, Naoyuki (Okayama University) Nitta, Shinnosuke (Graduate School of Engineering, Kyoto University) Ishi, Yoshihiro (Kyoto University Research Reactor Institute) Uesugi, Tomonori (Kyoto University Research Reactor Institute) Kuriyama, Yasutoshi (Kyoto University Research Reactor Institute) Sakamoto, Masaaki (Kyoto University Research Reactor Institute) Ohtsuki, Tsutomu (Kyoto University Research Reactor Institute)

저널정보: 대한방사선방어학회 방사선방어학회지 방사선방어학회지 제41권 제3호

발행연도: 2016.1

수록면: 216 - 221 (6page)

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Background: Very fine radiation-induced aerosol particles are produced in intense radiation fields, such as high-intensity accelerator rooms and containment vessels such as those in the Fukushima Daiichi nuclear power plant (FDNPP). Size measurement of the aerosol particles is very important for understanding the behavior of radioactive aerosols released in the FDNPP accident and radiation safety in high-energy accelerators. Materials and Methods: A combined technique using wire screens and imaging plates was developed for size measurement of fine radioactive aerosol particles smaller than 100 nm in diameter. This technique was applied to the radiation field of a proton accelerator room, in which radioactive atoms produced in air during machine operation are incorporated into radiation-induced aerosol particles. The size of $^{11}C$-bearing aerosol particles was analyzed using the wire screen technique in distinction from other positron emitters in combination with a radioactive decay analysis. Results and Discussion: The size distribution for $^{11}C$-bearing aerosol particles was found to be ca. $70{\mu}m$ in geometric mean diameter. The size was similar to that for $^7Be$-bearing particles obtained by a Ge detector measurement, and was slightly larger than the number-based size distribution measured with a scanning mobility particle sizer. Conclusion: The particle size measuring method using wire screens and imaging plates was successfully applied to the fine aerosol particles produced in an intense radiation field of a proton accelerator. This technique is applicable to size measurement of radioactive aerosol particles produced in the intense radiation fields of radiation facilities.

#Particle size measurement #Radioactive aerosol #Diffusion battery #Imaging plate #Proton accelerator

참고문헌 (16)

참고문헌 신청

Kaneyasu N / 2012 / Sulfate aerosol as a potential transport medium of radiocesium from the Fukushima nuclear accident / Environ. Sci. Technol 46:5720~5726

Kondo K / 1984 / Particle size distribution of 7Be-aerosols formed in high energy accelerator tunnels / Int. J. Appl. Radiat. Isot 35:939~944

Muramatsu H / 1988 / Radioactive airborne species formed in the tunnels of a high energy accelerator tunnels / Appl. Radiat. Isot 39:413~419

Kondo K / 2006 / Radioactive airborne species formed in the air in high energy accelerator tunnels / J. Nucl. Radiochem. Sci 7:R31~R36

International Commission of Radiological Protection / 1994 / Human respiratory tract model for radiological protection / ICRP Publication 66 :106~114

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