Estimating excess of lung risk factor of radon gas for some houses in Al-Fallujah city

Abstract

Instruments for the measurements of radon, thoron and its decayproducts in air are based mostly on the detection of alpha particles.The health hazards of radon on general public are well known. Inorder to understand the level and distribution of 222Rn concentrationsindoor in Al-Fallujah City; new technique was used, this techniquewas three radon–thoron mixed field dosimeters is made up of a twinchamber cylindrical system and three LR-115 type II detectors wereemployed. The aim of this work was to measurement radon gas usingSSNTD technique door in in Al-Fallujah City, and estimation ofexcess in cancer due to increment in radon gas. Results for sampleswhich are collected from January to April 2013 show that the 222Rnconcentration varies from 52.33 to 108.70 Bq.m-3 with an average of84.64 Bq.m-3, according to EPA and ICRP, the average indoor radonlevel should be 148 Bq/m3 and 300 Bq/m3, respectively, whereasapproximately 15 Bq/m3 (ranging from 1 Bq/m3 to 100 Bq/m3 ofradon concentration is normally found in outside air. Also the valuesof annual effective dose and excess lung cancer per million peopleper year (ELC) have also been calculated and found to vary from0.941 to 2.350 mSv.y-1 with an overall average of 1.581 mSv.y-1 and,565 to 1410 with an overall average 948, respectively.