Results 141 to 150 of about 586 (176)
Some of the next articles are maybe not open access.
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
openaire +2 more sources
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
Study of radon exhalation from the soil
Journal of Radioanalytical and Nuclear Chemistry, 2017The influence of meteorological parameters on radon exhalation rate was analyzed. The analyses show a significant influence of precipitation on radon exhalation rate. The highest exhalation rate was found during dry periods and the lowest during the periods of strong precipitation.
Monika Müllerová +3 more
openaire +1 more source
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
exaly +3 more sources
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
openaire +2 more sources
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
openaire +2 more sources
Radon in soil gas — Exhalation tests and in situ measurements
Science of The Total Environment, 1985Radon in soil can move into buildings resulting in high radon daughter concentrations. The foundation of a dwelling should be adapted to the radon "risk" which is determined by the radon concentration and the air permeability of the soil. Different measuring procedures are discussed in this paper, both in situ measurements of radon content and ...
A, Lindmark, B, Rosen
openaire +2 more sources
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
openaire +2 more sources
Radon exhalation and ultrafine fraction of radon progeny in closed room air
Atmospheric Environment, 1999The influence of 222Rn exhalation from walls and air exchange (low ventilation rates ...
A. El-Hussein, A. Mohammed, A.A. Ahmed
openaire +1 more source
Radon exhalation from granites used in Saudi Arabia
Journal of Environmental Radioactivity, 2001Measurements of radon exhalation for a total of 50 selected samples of construction materials used in Saudi Arabia were taken using a radon gas analyzer. These materials included sand, aggregate, cement, gypsum, hydrated lime, ceramics and granite. It was found that the granite samples were the main source of radon emanations.
openaire +2 more sources