Results 161 to 170 of about 5,509,012 (200)

Radon exhalation rate in building materials

International Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements, 1991
Radon 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, P.J. Jojo, A.J. Khan, R.K. Tyagi, Rajendra Prasad   +4 more
openaire   +1 more source

Radioactivity and radon exhalation rates of building materials in The Netherlands

Science of The Total Environment, 1985
About 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, J F, den Boer, P, de Jong, R A, Wolschrijn   +3 more
openaire   +2 more sources

Identification of sources with abnormal radon exhalation rates based on radon concentrations in underground environments

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, Yong, Liu, Yonghong, Liu, Ying, Song, Changshou, Hong, Xiangyang, Li   +5 more
openaire   +2 more sources

Radon and Thoron exhalation rate map in Japan

AIP Conference Proceedings, 2008
Measurements 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, Shimo Michikuni, Sugino Masato, Furukawa Masahide, Fukushi Masahiro, Minami Kazuyuki, Ejiri Kazutaka, Anselmo Salles Paschoa, Friedrich Steinhäusler   +8 more
openaire   +1 more source

The Determination of Radon Exhalation Rates

Health Physics, 1983
The 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 ...
openaire   +2 more sources

Numerical Simulations for Radon Migration and Exhalation Behavior During Measuring Radon Exhalation Rate With Closed-Loop Method

Nuclear Science and Techniques/Hewuli
Ming Xia, Yongjun Ye
exaly   +2 more sources

ASSESSMENT OF RADIOACTIVITY AND RADON EXHALATION RATE IN EGYPTIAN CEMENT

Health Physics, 2004
The cement industry is considered as one of the basic industries that plays an important role in the national economy of developing countries. Activity concentration of 238U, 232Th, and 40K in local cement types from different Egyptian factories has been measured using a shielded HPGe detector.
openaire   +2 more sources

Radon Exhalation Rates and Gamma Doses from Ceramic Tiles

Health Physics, 1998
This 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
openaire   +2 more sources

Radon Exhalation Rate of Some Building Materials Used in Egypt

Environmental Geochemistry and Health, 2005
Indoor radon has been recognized as one of the health hazards for mankind. Common building materials used for construction of houses, which are considered as one of the major sources of this gas in indoor environment, have been studied for exhalation rate of radon.
A F, Maged, F A, Ashraf
openaire   +2 more sources

Natural radioactivity and radon exhalation rate of soil in southern Egypt

Applied Radiation and Isotopes, 2001
The level of natural radioactivity in soil of 30 mining samples collected from six locations in southern Egypt was measured. Concentrations of radionuclides in samples were determined by gamma-ray spectrometer using HPGe detector with a specially designed shield.
A, Sroor, S M, El-Bahi, F, Ahmed, A S, Abdel-Haleem   +3 more
openaire   +2 more sources