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Diurnal variations in radon concentrations in a school and office:: implications for determining radon exposure in day-use buildings
Affiliation:1. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, China;2. Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, Washington, USA;3. Research Center for Eco-Environmental Science, Chinese Academy of Science, Beijing, China;4. Energy Research Institute, Nanyang Technological University, Singapore;5. Division of Environmental and Water Resources, School of Civil and Environmental Engineering, Nanyang Technological University, Singapore;6. College of Environmental Science and Engineering, Nankai University, Tianjin, China;7. Hubei Provincial Meteorological Service Center, Wuhan, Hubei, China;8. Department of Building, School of Design and Environment, National University of Singapore, Singapore;2. Nuclear Research and consultancy Group (NRG), Arnhem, The Netherlands;3. National Institute for Insurance against Accidents at Work (INAIL), Rome, Italy;4. Belgian Nuclear Research Centre (SCK•CEN), Mol, Belgium;5. Federal Agency for Nuclear Control, Brussels, Belgium;11. University of Tirana, Tirana, Albania;12. Hasselt University, CMK, NuTeC, Diepenbeek, Belgium;8. University of Minho, Guimarães, Portugal;9. JRHC Enterprises Pty Ltd, Aldgate, SA, Australia;112. Technion – Israel Institute of Technology, Haifa, Israel;123. BVS-ABR-Association Belge de Radioprotection, Gent, Belgium;84. IBR Consult BV, Haelen, Netherlands
Abstract:Diurnal radon concentrations were measured in a school and an office that exhibited high average annual radon concentrations from passive alpha track detector measurements. The diurnal measurements in both cases showed very high nighttime concentrations (3000–6000 Bq m−3) and low daytime concentrations under the action level of 200 Bq m−3 used in Norway. These results suggest that the only way to accurately assess radon exposure in day-use buildings is to include measurements of radon concentrations limited to the hours when the buildings are actually in use.
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