Effective Dose Equivalent Rate for The Respiratory Tract from Daughter Products of Radon

Using standard models, the dose and dose equivalent received by tracheobronchial (T-B) and pulmonary (P) regions of human lung from exposure to radon daughter products have been estimated. Effective dose equivalent rates determined by OECD, ICRP and UNSCEAR have been compared and the conversion factor of (7-17) nSv h-1 per Bq m-3 recommended by ICRP has been adapted to find out dose equivalent rate for the house dwellers in the Pakistani cities of Islamabad/Rawalpindi and Lahore. In the bed rooms of these cities an estimated dose equivalent rate of 2 mSv per year was found. For mine workers the conversion factor of 10 mSv y-1 per WLM was adapted. The mine workers of Makarwal Coal Mines (Pakistan) receive 8-12 mSv y-1 which is 4 to 6 times higher than the value for houses in the cities of Islamabad, Rawalpindi and Lahore.