Environmental Air Dosimetry in Some Locations of Jazan Using Passive Track Detectors

EL-Araby, Entesar. H.

doi:10.12720/jolst.1.1.75-78

Cited by 6 publications

(9 citation statements)

References 14 publications

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“…31,50,51 The radon exhalation values in this study are lower than the values reported for Saudi Arabia. 30,41…”

Section: Discussionmentioning

confidence: 99%

“…The average background track density for the unexposed detector was subtracted from the observed values. The value of soil radon concentration (Bq m −3 ) has been obtained from equation (1) 3,6,23,24,30,33 where ρ is the background corrected track density (tracks cm −2 ) and T is the total time of exposure (d). K is the sensitivity factor and its value is calculated by different literatures 3,23,24,30,33 which is 0.2315 tracks cm −2 d −1 (Bq m −3 ) −1 .…”

Section: Methodsmentioning

confidence: 99%

“…[23][24][25][26] The calculations for annual exposure, the annual effective dose and lifetime fatality risk were made using the conversion factor given elsewhere. 9,26,[28][29][30]…”

Section: Experimental Procedures Measurement Of Indoor Radon Concentrationmentioning

confidence: 99%

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Indoor radon in dwellings of Jeddah city, Saudi Arabia and its correlations with the radium and radon exhalation rates from soil

Farid

2014

Indoor and Built Environment

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To assess the potential health risks associated with indoor radon, a study was carried out in 80 dwellings in Jeddah city, Saudi Arabia using CR-39 plastic track detectors. The annual average indoor radon concentrations varied from 21 to 52 Bq m−3, with a mean value of 36 Bq m−3, which is well below the recommended action level recommended by the International Commission on Radiological Protection (ICRP). The annual effective dose varied from 0.35 to 0.89 mSv y−1. The results showed no significant radiological risks for the inhabitants. The radium content, radon exhalation rate and the concentration of radon in soils samples were measured using the ‘Can Technique’. The radium concentrations in soil varied from 18.0 to 33.0 Bq kg−1. The radon exhalation rates in the samples varied from 4.58 to 8.40 Bq m−2 h−1 (135 to 251 mBq kg−1 h−1). There was a linear relationship between the indoor radon concentration and the radium concentration in the soil. A positive correlation was observed between the radon exhalation rate and soil radium concentration. Furthermore, changes in the ventilation rate had a significant effect on the indoor radon concentration.

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“…31,50,51 The radon exhalation values in this study are lower than the values reported for Saudi Arabia. 30,41…”

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Indoor radon in dwellings of Jeddah city, Saudi Arabia and its correlations with the radium and radon exhalation rates from soil

Farid

2014

Indoor and Built Environment

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“…The theoretical calculations of the calibration factor, K, were performed by following the model of Eugin Shaji et al (2012), as well as that of Sarma (Barillon et al 1993), for parameters; the fraction of alpha emitters present in air, cup wall dimension, the type of used detector via etching conditions (Sarma 2013;El-Araby 2013). The integrated radon concentration can be calculated from the track density ρ (tracks cm −2 ) which is related to the radon activity concentration C a (Bq cm −3 ) and the exposure time T (days) from formula:…”

Section: The Radioactivity Measurementsmentioning

confidence: 99%

Alpha radioactivity level along Tigris River sediments in Baghdad governorate area by using CR-39 SSNTD’s

2019

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The alpha activities of sediment samples, collected from selected sites along Tigris River in Baghdad city area from January to November 2015, were measured. The measurements were based on the radon exhalation rate Bq m −1 from the sediment samples, of 10.00 g mass. It was found that the higher calculated uranium contents were observed during winter months from November to January, while the lowest one were during summer months from May to September. This difference was attributed to the nature of the sediment samples and anthropogenic activities that affected ecosystem of the river. Uranium content of the samples was increased ongoing towards south of the city due to the effects of huge human activities. The increase in water level of Tigris River during this period possibly related to the melting of snow in the Turkish mountainous region. Higher water stream can remove sediments from the river bottom; this mechanism will be partially responsible for increasing the radioactivity level at downstream of the river.

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“…Ten attempts (pictures) have been taken for each sample, otherwise to calculate the average number of tracks obtained for each sample. The track density has been calculated by using the following equation [12,13]: (2)…”

Section: Microscopic Viewingmentioning

confidence: 99%

Measurements of Radon Concentrations and Dose Assessments in Physics Department-Science College-Al-Mustansiriyah University, Baghdad, Iraq

Al-Alawy

Fadhil

2015

ILCPA

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ABSTRACT. Measurements of radon gas concentrations with their progeny and the annual effective dose indoor the building of Al-Mustansiriyah University College of Science-Physics Department have been carried out by using time-integrated passive radon dosimeters solid state nuclear track detector CR-39 technique. The detectors with 1cm x1cm have been distributed over 70 places and suspended for sitting (1m) and standing (1.75m) positions in each location under study. The dosimetric measurements are made over a period of 90 days from 30 January 2014 to 30 April 2014. The calibration process has been done using radium-226 source with known activity radiation. It has found that the indoor radon gas concentrations varing from 37. (ICRP, 2009). The annual effective dose of the inhalation exposure to radon gas has been estimated and this vary from 0.394mSv/y to 0.617mSv/y with an average value 0.540mSv/y at 1m, and varing from 0.378mSv/y to 0.599mSv/y with an average value 0.495mSv/y at 1.75m which are within the worldwide permissible limist 3-10mSv/y (ICRP, 1993). The potential alpha energy concentration found to vary from 4.053mWL to 6.343mWL with an average value 5.557mWL at 1m and vary from 3.888mWL to 6.162mWL with an average value 5.087mWL at 1.75m which are less than the recommended value 53.33mWL (UNSCEAR, 1993). The lung cancer cases per million person per year vary from 7.093 to 11.101 per million person per year with an average value 9.725 per million person per year at 1m and vary from 6.805 to 10.784 per million person per year with an average value 8.904 per million person per year which are less than the recommended range 170-230 per million person per year (ICRP, 1993). The number of decays per-minute using swabs measurements technique have been used for selected units within two swabs from building materials walls for each unite, with area of 100cm 2 using Ludlum 3030, the average of three swabs measurements have been calculated. Hence, the effectiveness of emitted alpha particles from the walls has been calculated to be varied from 0.00000 to 0.02222Bq/cm 2 with an average value 0.01169Bq/cm 2 at 1m and 0.01015Bq/cm 2 at 1.75m respectevily which are within the permissible limit 0.04Bq/cm 2 (Danial, 2010).

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Environmental Air Dosimetry in Some Locations of Jazan Using Passive Track Detectors

Cited by 6 publications

References 14 publications

Indoor radon in dwellings of Jeddah city, Saudi Arabia and its correlations with the radium and radon exhalation rates from soil

Indoor radon in dwellings of Jeddah city, Saudi Arabia and its correlations with the radium and radon exhalation rates from soil

Alpha radioactivity level along Tigris River sediments in Baghdad governorate area by using CR-39 SSNTD’s

Measurements of Radon Concentrations and Dose Assessments in Physics Department-Science College-Al-Mustansiriyah University, Baghdad, Iraq

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