| Deng Jun,Zhai Hezheng,Song Yanchao,et al.The variation of the radon emanation coefficient on aerated concrete blocks with respect to water content, temperature and humidity[J].Chinese Journal of Radiological Medicine and Protection,2015,35(11):851-853,874 |
| The variation of the radon emanation coefficient on aerated concrete blocks with respect to water content, temperature and humidity |
| Received:January 29, 2015 |
| DOI：10.3760/cma.j.issn.0254-5098.2015.11.012 |
| KeyWords:Aerated concrete block Radon emanation coefficient Moisture content Temperature Relative humidity |
| FundProject:科技部科研院所社会公益研究专项(2005DIB1J087);科技部科研院所技术开发研究专项(2012EG150137) |
| Author Name | Affiliation | E-mail | | Deng Jun | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Zhai Hezheng | 中国医学科学院放射医学研究所 | | | Song Yanchao | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Wang Tuo | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | An Jinggang | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Liu Xiaohui | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Zhang Yonggui | 中国建筑材料科学研究总院 | | | Su Xu | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | suxu@nirp.cn |
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| Abstract:: |
| Objective To study the variation of radon emanation coefficient of aerated concrete blocks with respect to moisture content, temperature and relative humidity.Methods By using continuous radon measurement instrument and sealed cavity, the radon emanation coefficients were obtained in conditions of different moisture(0-60%), temperature(10-40℃)and humidity(12%-95%). The variation of radon emanation coefficients(ε) with respect to moisture(s), temperature(T) and humidity were also studied by regression analysis. Results The study showed a logarithmic increase in radon emanation coefficient with the increased moisture[ε=0.096·ln(s+2.43)+0.03,R2=0.952], a linear increase with increased temperature(ε=0.002 45·T+0.060 1,R2=0.987), and no significant influence on radon emanation coefficient with respect to humidity(P>0.05). Conclusions Both moisture and temperature affect the radon emanation coefficient to a larger extent. Attention should be paid to both factors in the assessment and control system of radioactive hazard from building materials. |
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