A comparative study of the indoor radon level with the radon exhalation rate from soil in Alexandria city

Department of Basic and Applied Science, Faculty of Engineering, Arab Academy for Science & Technology, Alexandria, Egypt.
Radiation Protection Dosimetry (Impact Factor: 0.91). 10/2012; 154(4). DOI: 10.1093/rpd/ncs267
Source: PubMed


The assessment of the radiological risk related to the inhalation of radon and radon its progeny is based mainly on the integrated measurement of radon in both indoor and outdoor environments. The exhalation of radon from the earth's crust and building materials forms the main source of radon in the indoor environment. This study has been undertaken for the purpose of health risk assessment. In this comparative study, the indoor radon level, radium content, radon exhalation rate and concentration of soil radon are measured using the Can Technique. Soil samples were collected simultaneously from different geological formations of the same area for laboratory measurement of the radon exhalation rate. The radon exhalation rate was measured in the laboratory using LR-115 type II plastic track detectors. The indoor radon concentrations in this study area were found to vary from 44±9 to 132±31 Bq m(-3) with an average of 72±29 Bq m(-3). The seasonal variations of the indoor radon reveal the maximum values in the winter and in summer in different dwellings of Alexandria city. The annual effective dose varies from 0.75 to 2.2 mSv with an average value of 1.34 mSv. The radon exhalation rate was found to vary in the ranges 8.31-233.70×10(-3) Bq kg(-1) h(-1), 0.48-15.37 Bq m(-2) h(-1) with an average 47.97×10(-3) Bq kg(-1) h(-1), (3.14 Bq m(-2) h(-1)). The radium content in soil varies from 3.14 to 39.60 Bq kg(-1) with an average of 11.55 Bq kg(-1). The significance of this study is discussed in details from the point of view of radiation protection.

9 Reads
  • [Show abstract] [Hide abstract]
    ABSTRACT: Annual average indoor 222Rn concentrations in 40 residences in and around Grand Junction, CO, have been measured repeatedly since 1984 using commercial alpha-track monitors (ATM) deployed for successive 12-mo time periods. Data obtained provide a quantitative measure of the year-to-year variations in the annual average Rn concentrations in these structures over this 6-y period. A mean coefficient of variation of 25% was observed for the year-to-year variability of the measurements at 25 sampling stations for which complete data were available. Individual coefficients of variation at the various stations ranged from a low of 7.7% to a high of 51%. The observed mean coefficient of variation includes contributions due to the variability in detector response as well as the true year-to-year variation in the annual average Rn concentrations. Factoring out the contributions from the measured variability in the response of the detectors used, the actual year-to-year variability of the annual average Rn concentrations was approximately 22%.
    Health Physics 10/1991; 61(3):409-13. DOI:10.1097/00004032-199109000-00012 · 1.27 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The analysis of climatic, geological and architecture features of two regions was carried out from radon potential point of view. Altaiskii Krai and Tomsk Oblast are situated in the south of West Siberia. Therefore, the continental climate with a high dynamics of climatic and ecological parameters is typical for both regions. Architecture and building material types are alike in many aspects. However, geological features of these regions differ substantially. This may cause a difference in distributions of radon levels in buildings. Radon levels inside buildings of rural and urban types were measured using SSNTDs, charcoal canisters and radon-monitors Alpha-GUARD PQ2000 (confirmative measurements). Exposure periods were 1–3 months in different year seasons. The experimental results were statistically analyzed. The contributions of main radon sources into total level were revealed and the gradation of sources was made. The results of the comparative analysis and discussion are presented in the paper.
    Radiation Measurements 11/2005; 40(2-6-40):682-685. DOI:10.1016/j.radmeas.2004.12.022 · 1.21 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this work, the KFK-Passive radon dosimeter was used to evaluate the radon concentration in some Egyptian dwellings. The survey program includes indoor and outdoor measurements during summer and winter seasons. Measurements were carried out in different heavly populated towns. Results have shown that indoor radon concentrations in Egypt varies between 47 and 3 Bq/m3 with a mean value of 13 Bq/m3 in the winter and 7 in the summer. The difference between indoor and outdoor was found to be relatively small due to the non-tight building style in Egypt.Measurements were made also in towns nearby black sand deposits at the outlet of the River Nile. No significant difference was observed in the mean radon concentrations compared with Cairo and Alexandria.
    Nuclear Tracks and Radiation Measurements 01/1993; 22(1-4):341-344. DOI:10.1016/0969-8078(93)90081-E
Show more