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.
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