scholarly journals Natural Radionuclides and Radon Exhalation Rate in the Soils of Cauvery River Basin

2017 ◽  
Vol 10 ◽  
pp. 117862211774694 ◽  
Author(s):  
CS Kaliprasad ◽  
PR Vinutha ◽  
Y Narayana
Keyword(s):  
Gamma Ray ◽  
Natural Radionuclides ◽  
Soil Samples ◽  
Radon Exhalation Rate ◽  
Exhalation Rate ◽  
Cauvery River ◽  
Mean Values ◽  
Radon Exhalation ◽  
The Mean ◽  
Recommended Level

In this study, systematic measurement of activity concentrations of 40K, 226Ra, and 232Th and radon exhalation rate has been done in soil samples of Cauvery River environment. The activity was measured using HPGe gamma-ray spectrometer, and the mean values of 40K, 226Ra, and 232Th in the soil samples were found to be 182 ± 4, 34 ± 2, and 19 ± 1 Bq kg−1, respectively. The radon exhalation rate was measured by “Can technique” using SSNTD (LR-115) films. The mean values of radium concentration, surface exhalation, and mass exhalation rate were found to be 118.95, 293.61, and 108.53 mBq kg−1 h−1, respectively. The radiological hazard indices due to natural radioactivity were calculated and compared with international recommended values, which are lower than the recommended level. The radon exhalation rate is lower than the recommended level.

Comparing of the Natural Radioactivity in Soil Samples of University at Al-Husseineya and Al-Mothafeen Sites of Kerbala, Iraq

2021 ◽  
Vol 14 (2) ◽  
pp. 177-191
Keyword(s):  
Natural Radioactivity ◽  
Gamma Ray ◽  
Specific Activity ◽  
Soil Samples ◽  
Standard Errors ◽  
Radiological Hazard ◽  
Gis Technology ◽  
Mean Values ◽  
The Mean ◽  
Radiological Hazard Indices

Abstract: Radioactivity must be studied in soil to see the changes in the doses of human exposure. In this study, natural radioactivity and radiological hazard indices in soil samples of the Faculty of Agriculture (Al-Husseineya site) and the Faculty of Medicine (Al-Mothafeen site) in Kerbala Governorate were determined using gamma-ray spectroscopy. The results showed that the mean values of specific activity (in units of Bq/kg) and standard errors of: 238U, 232Th and 40K at Al-Husseineya site was 21.7±7.2, 9.43±3.2 and 335.8±82.2, respectively, while at Al-Mothafeen site, the mean values and standard errors were 22.4±8.8, 11.2±3.3 and 333.1±70.7, respectively. Radiation maps of natural radioactivity (238U, 232Th and 40K) at Al-Husseineya and Al-Mothafeen sites were mapped using geographic information system (GIS) technology. Moreover, most results in the present study fall within the acceptable levels, as defined by OCDE, UNSCEAR and ICRP. Therefore, there is no significant radiological hazard at the sites which were studied. Keywords: Radiological hazard, Natural radioactivity, Soil, NaI (Tl), Gamma-ray, Karbela University.

The study of natural radionuclides and radon exhalation rate in ceramic materials containing fly ash developed in Israel

2004 ◽  
Vol 92 (4-6) ◽  
Author(s):  
N. Lavi ◽  
Z. B. Alfassi
Keyword(s):  
Fly Ash ◽  
Radiation Dose ◽  
Building Materials ◽  
Natural Radionuclides ◽  
Construction Materials ◽  
Ceramic Materials ◽  
Radon Exhalation Rate ◽  
Exhalation Rate ◽  
Radon Exhalation ◽  
Ceramic Blocks

AbstractThe ionizing radiation dose from building materials containing fly ash (FA) has been studied. Ceramic products, plates, bricks and blocks containing fly ash have been studied and compared to other construction materials for both natural radionuclides content (NORM), radon exhalation rate and gamma radiation dose .The total radiation dose due to walls built from ceramic blocks containing FA (45% fly ash), was found to be lower than radiation doses due to walls of other construction materials, Assuming two walls (the exterior ones) built of this ceramic material the doses are 0.09-0.13 mSv/y for ceramic materials densities of 800 and 1200 kg/m

scholarly journals NATURAL RADIONUCLIDE DISTRIBUTION AND RADON EXHALATION RATE FROM THE SOIL IN VILNIUS CITY

2007 ◽  
Vol 15 (1) ◽  
pp. 31-37 ◽  
Author(s):  
Dainius Jasaitis ◽  
Aloyzas Girgždys
Keyword(s):  
Building Materials ◽  
Natural Radionuclides ◽  
Natural Radionuclide ◽  
Radon Exhalation Rate ◽  
Clay Loam ◽  
Exhalation Rate ◽  
Radon Exhalation ◽  
Radionuclide Distribution ◽  
The City ◽  
Different Soils

In the territory of Vilnius city radioisotopic composition of different soils was experimentally determined and radon exhalation rate from the soil was evaluated using these data. Specific activitys of natural radionuclides 226Ra, 232Th and 40K were measured. From identified natural radionuclides the biggest quantities were for 40K (263 Bq/kg), the smallest values ‐ for 232Th (5 Bq/kg), average 226Ra values reached 13 Bq/kg. Radon exhalation rate from the soil in Vilnius city was calculated and evaluated. Distribution of radon exhalation rate values in the whole territory of the city is stated. The received values vary from 15 Bq/m2·h (in clay loam) to 23 Bq/m2·h (in sand). It is assessed that of the most important parameters, which determine radon exhalation rate from the soil, are the quantity of radium and the porosity of the soil. It is observed that radon exhalation rate from the soil is bigger than that from building materials. This difference is determined by a bigger porosity of the soil.

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