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Effect of Humidity on Radon Exhalation Rate from Concrete
Effect of Humidity on Radon Exhalation Rate from Concreteopenaire +1 more source
Radon and thoron exhalation rates and their some correlating factors
Radon and thoron exhalation rates and their some correlating factorsopenaire
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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 ...
Chau Nguyen Dinh
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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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Postprandial Changes in the Exhalation Rate of Radon Produced in Vivo
Science, 1978The rate of exhalation of radon by persons with long-standing radium burdens increases about twofold shortly after a meal. The increase is short-lived and "normal" values are regained in 1.5 to 2 hours. The effect may account in part for the poor reproducibility in estimates of the freely emanating part of the radium content.
J, Rundo, F, Markun, J Y, Sha
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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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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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Radioactivity and radon exhalation rates of building materials in The Netherlands
Science of The Total Environment, 1985About 140 samples of building materials have been analysed by gamma spectrometry for their Ra-226, Th-232 and K-40 concentrations. The radon exhalation rate was measured from concrete slabs of different composition including fly-ash components. The activity concentrations of materials containing soil products, like clay bricks and concrete, proved to ...
J G, Ackers +3 more
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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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Science of The Total Environment, 2022
When there is poor ventilation or an irregular radon exhalation rate in an underground environment, it is necessary to judge whether the radon concentration is abnormal. To protect personal safety and health from radon gas, it is necessary to track the location of an abnormal radon source and measure its release rate to formulate emergency control and ...
De, Huang +5 more
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When there is poor ventilation or an irregular radon exhalation rate in an underground environment, it is necessary to judge whether the radon concentration is abnormal. To protect personal safety and health from radon gas, it is necessary to track the location of an abnormal radon source and measure its release rate to formulate emergency control and ...
De, Huang +5 more
openaire +2 more sources