Radon concentration and radon exhalation rate for basement rocks from Wadi Um Huytat in Central Eastern Desert of Egypt

Abstract Continuous indoor radon measurements were carried out in two traditional Russian rural houses located in different villages of the Moscow region in summer of 2017 and 2018. In additional, in the summer of 2017, continuous measurements of soil gas radon activity concentration at depth 0.8 m and radon exhalation rate from the ground surface near the house were performed simultaneously. It was found that the indoor radon concentration in rural houses is subject to strong daily variations, which are characterized by highs at night and lows during the day. Indoor radon concentration is directly proportional to indoor and outdoor temperature difference and inversely proportional to wind speed. While the radon exhalation rate from the ground surface, as well as the ventilation of premises (opening doors and windows) practically do not affect the concentration of radon in Russian rural wooden houses.

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Noise Reduction Treatment and Analysis of Accumulated Radon Concentration in Uranium-Like Rock Based on Wavelet Theory

Volume 4: Nuclear Safety, Security, and Cyber Security; Computer Code Verification and Validation ◽

10.1115/icone26-81068 ◽

2018 ◽

Author(s):

Fuliang Jiang ◽

Wenchao Yang ◽

Ming Li ◽

Xiangyang Li ◽

Changshou Hong

Keyword(s):

Radon Concentration ◽

Raw Materials ◽

Uranium Mine ◽

Radon Exhalation Rate ◽

Exhalation Rate ◽

Wavelet Theory ◽

Actual Measurement ◽

Radon Exhalation ◽

Single Side ◽

Uranium Tailings

Based on the principle of similarity, uranium ore samples were prepared from raw materials such as uranium tailings, quartz sand and refined iron powder, and then the samples were treated with different packages for measuring the sample accumulated radon concentration. In the actual measurement process, due to the characteristics of radionuclide decay, instrument reasons and human factors, the data will be a certain deviation. Therefore, the method of wavelet analysis is used to denoise the accumulated radon concentration and obtain radon exhalation rate. The results of the study show: the correlation coefficient of cumulative radon concentration fitted by wavelet denoising is improved greatly, and all of them are above 0.99, the recalculated radon exhalation rate of the single side of the sample is decreased by 0.06Bq · m−2 · s−1, and double-edged is decreased by 0.02Bq · m−2 · s−1. The experiment proved that wavelet theory can be used to correct calculated value of radon exhalation rate of uranium-like rock. At the same time, it provides a new method for further study of uranium mine radiation protection parameters.

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Utilization of Landsat-8 (OLI) Image Data for Geological Mapping of the Neo-Proterozoic Basement Rocks in the Central Eastern Desert of Egypt

Journal of the Indian Society of Remote Sensing ◽

10.1007/s12524-021-01465-9 ◽

2022 ◽

Author(s):

Mostafa Kamel ◽

Mamdouh M. Abdeen ◽

Mostafa M. Youssef ◽

Ahmed M. Orabi ◽

Elsayed Abdelbaky

Keyword(s):

Image Data ◽

Eastern Desert ◽

Geological Mapping ◽

Landsat 8 ◽

Landsat 8 Oli ◽

Central Eastern Desert ◽

Basement Rocks ◽

Central Eastern ◽

Proterozoic Basement

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Radon concentration in soil gas and radon exhalation rate at the Ravne Fault in NW Slovenia

Natural Hazards and Earth System Science ◽

10.5194/nhess-10-895-2010 ◽

2010 ◽

Vol 10 (4) ◽

pp. 895-899 ◽

Cited By ~ 33

Author(s):

J. Vaupotič ◽

A. Gregorič ◽

I. Kobal ◽

P. Žvab ◽

K. Kozak ◽

...

Keyword(s):

Dose Rate ◽

Radon Concentration ◽

Gamma Dose ◽

Soil Gas ◽

Gamma Dose Rate ◽

Radon Exhalation Rate ◽

Exhalation Rate ◽

Soil Permeability ◽

Radon Exhalation ◽

Soil Gas Radon

Abstract. The Ravne tectonic fault in north-west (NW) Slovenia is one of the faults in this region, responsible for the elevated seismic activity at the Italian-Slovene border. Five measurement profiles were fixed in the vicinity of the Ravne fault, four of them were perpendicular and one parallel to the fault. At 18 points along these profiles the following measurements have been carried out: radon activity concentration in soil gas, radon exhalation rate from ground, soil permeability and gamma dose rate. The radon measurements were carried out using the AlphaGuard equipment, and GammaTracer was applied for gamma dose rate measurements. The ranges of the obtained results are as follows: 0.9–32.9 kBq m−3 for radon concentration (CRn), 1.1–41.9 mBq m−2 s−1 for radon exhalation rate (ERn), 0.5–7.4×10-13 m2 for soil permeability, and 86–138 nSv h−1 for gamma dose rate. The concentrations of 222Rn in soil gas were found to be lower than the average for Slovenia. Because the deformation zones differ not only in the direction perpendicular to the fault but also along it, the behaviour of either CRn or ERn at different profiles differ markedly. The study is planned to be continued with measurements being carried out at a number of additional points.

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