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Feasibility for mapping radon exhalation rate from soil in China
Feasibility for mapping radon exhalation rate from soil in Chinaopenaire
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Building materials radon exhalation rate: ERRICCA intercomparison exercise results
Science of The Total Environment, 2001The Nuclear Engineering Section of the National Technical University of Athens undertook the organisation of a European building material radon exhalation rate intercomparison exercise in the framework of the European Research into Radon In Construction Concerted Action (ERRICCA).
N P, Petropoulos +2 more
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Diffusion Model of Radon Exhalation Rates
Health Physics, 1998Radon migration through walls is considered using an effective diffusion model. One and two dimensional models as well as a spherical geometry are compared. It is concluded that either the 1-dimensional or spherical model, both having analytical solution, may be used for practical purposes. Application is made for typical cases in Athens, Greece.
M, Antonopoulos-Domis +2 more
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Radon Exhalation Rate from Various Building Materials
Health Physics, 1993Solid-state alpha-track detectors using cellulose nitrate films were used to measure the radon exhalation rates from building materials. The radon flux emitted from the surface of the building material was measured by placing an inverted cup on the top of the building material. Cellulose nitrate film was placed within the cup.
C J, Chen, P S, Weng, T C, Chu
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Factors controlling measurements of radon mass exhalation rate
Journal of Environmental Radioactivity, 2005Radon mass exhalation rate of soil samples was measured using an exhalation chamber of 10 dm(3) volume and a Lucas cell. The results show that mass of sample, grain size and water content influence the radon mass exhalation rate. For soil of (226)Ra activity concentration about 2500 Bq kg(-1) and samples within the range from 0.20 kg to 0.50 kg, the ...
Dinh Chau, Nguyen +2 more
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Measuring radon exhalation rate through three cycles
Journal of Instrumentation, 2012This paper proposes that the radon exhalation rate can be calculated through three measurement cycles performed by a radon monitor based on the electrostatic collection method. The first cycle time is 20 min, the measured value in this cycle falls into disuse. The radon concentrations in the next two long cycles can be accurately measured.
Y Tan, D Xiao
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Radon exhalation rate in building materials
International Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements, 1991Radon is present in trace amounts almost everywhere on the earth, being distributed in the soil, the ground water and in the lower atmosphere. Radon can originate from a deeply burried deposit and can migrate to the surface of earth by diffusion and transport process.
A. Rawat +4 more
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Radon Exhalation Rates and Gamma Doses from Ceramic Tiles
Health Physics, 1998This study was carried out to assess the possible radiological hazard resulting from the use of zircon in glaze applied to tiles used in buildings. The 226Ra content of various stains and glazing compounds was measured using gamma spectroscopy and the 222Rn exhalation rates for these materials were measured using adsorption on activated charcoal.
R S, O'Brien, H, Aral, J R, Peggie
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Radon and Thoron exhalation rate map in Japan
AIP Conference Proceedings, 2008Measurements of radon and thoron exhalation rates have been done using the radon and thoron exhalation rate measuring instrument adopting the accumulation method. We obtained the 111 data in the 40 sites of the 14 prefectures in Japan. The arithmetic average value of the radon and thoron exhalation rates by all 111 data were obtained to be 8.6 mBq⋅m−2 ...
Hosoda Masahiro +8 more
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The Determination of Radon Exhalation Rates
Health Physics, 1983The exhalation of radon from porous materials like mining wastes and building materials can be determined by studying the growth of radon activity in vessels containing samples of the materials. It is demonstrated that the initial part of the activity growth curve determines the total free exhalation rate of the sample used, independently of container ...
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