indoor radon measurement in dwellings of khorramabad city, iran

Introduction: exposure to indoor radon increases the risk of lung cancer. this study examined the level of indoor radon in dwellings of khorramabad city, by using passive alpha-track detector (cr-39) during winter of 2016. materials and methods: in the present study, we detected the concentration of indoor radon in 56 dwellings. a passive sampling instrument (alpha-track detector with cr-39 polycarbonate films) was utilized to measure indoor radon gas concentration. the distribution map of indoor radon concentration was prepared using arc gis software. results: radon concentration in the dwellings varied from 1.08 to 196.78 bq/m3, with a mean value of 43.43±40.37 bq/m^3. the average annual effective dose received by the residents of the studied area was estimated to be 1.09 msv. our results showed a significant difference between the average radon concentrations in houses and apartments, with a higher level in houses. conclusion: indoor radon concentration in 10.1% of the dwellings was determined to be higher than the limit (100 bq/m^3) recommended by the world health organization.