Radon Migration Process and Its Influence Factors; Review
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概要
- 論文の詳細を見る
Radon (^<222>Rn) generated within the grains of rocks, soils, building materials and other materials by the radioactive decay of radium (^<226>Ra) can migrate to the atmosphere. This paper reviews the emanation coefficient, diffusion coefficient, and exhalation rate, and the factors that control the rate at which radon can enter atmosphere. The emanation coefficient which is the fraction of radon generated within the grains of materials and escaped to the pore space, varied from 2.1 to 32% for rocks, from 0.14 to 80% for soil, and from 0.10 to 58% in case of building materials. In addition, measurement methods used to evaluate emanation coefficient and its influence factors are also reviewed. The diffusion of radon is a process determined by radon concentration gradient across the radon sources and the surrounding air. The effective diffusion coefficient of some materials is summarized. Moreover, the radon exhalation rate process and the main influencing factors on the variation of exhalation rate data are reviewed. The exhalation rate varied in the range of 0.11 to 80mBq m^<-2>s^<-1>, 2.0×10^<-3> to 5.0×10^4mBq m^<-2>s^<-1> and 4.0×10^<-3> to 5.0×10^1mBq m^<-2>s^<-1> for rocks, soils and building materials, respectively.
- 日本保健物理学会の論文
著者
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細田 正洋
中央医技専
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FUKUSHI Masahiro
School of Radiologic Sciences, Tokyo Metropolitan University of Health Sciences
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細田 正洋
中央医療技術専門学校 診療放射線学科
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細田 正洋
放射線医学総合研究所放射線防護研究センター
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Furukawa Masahide
University Of The Ryukyus Faculty Of Science
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Sahoo Sarat
National Institute Of Radiological Sciences Research Center For Radiation Protection
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Sahoo Sarata
Research Centre For Radiation Protection National Institute Of Radiological Sciences
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HOSODA Masahiro
National Institute of Radiological Sciences, Research Center for Radiation Protection
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SORIMACHI Atsuyuki
National Institute of Radiological Sciences, Research Center for Radiation Protection
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HASSAN Nabil
National Institute of Radiological Sciences, Research Center for Radiation Protection
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TOKONAMI Shinji
National Institute of Radiological Sciences, Research Center for Radiation Protection
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HASSAN Nabil
School of Radiological Sciences, Tokyo Metropolitan University
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HOSODA Masahiro
Research Centre for Radiation Protection, National Institute of Radiological Sciences
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ISHIKAWA Tetsuo
Research Centre for Radiation Protection, National Institute of Radiological Sciences
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SORIMACHI Atsuyuki
Research Centre for Radiation Protection, National Institute of Radiological Sciences
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TOKONAMI Shinji
Research Centre for Radiation Protection, National Institute of Radiological Sciences
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Hassan Nabil
National Institute Of Radiological Sciences Research Center For Radiation Protection
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Hosoda Masahiro
National Institute Of Radiological Sciences Research Center For Radiation Protection
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Hosoda Masahiro
Research & Development Center Unitika Ltd.
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Fukushi Masahiro
School Of Radiologic Sciences Tokyo Metropolitan University Of Health Sciences
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Tokonami S
National Inst. Of Radiological Sciences Res. Center For Radiation Protection
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Tokonami Shinji
Environmental Radioactivity Survey Section National Institute Of Radiological Sciences
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Ishikawa Tetsuo
National Institute Of Radiological Sciences Research Center For Radiation Protection
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Sorimachi Atsuyuki
National Institute Of Radiological Sciences Research Center For Radiation Protection
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Tokonami S
National Institute Of Radiological Sciences Research Center For Radiation Protection
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Ishikawa Tetsuo
National Inst. Of Radiological Sciences
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Tokonami Shinji
National Inst. Of Radiological Sciences
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Ishikawa Tetsuo
Radon Research Group Research Center For Radiation Safety National Institute Of Radiological Science
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細田 正洋
弘前大学
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