Inhaled Radon Progeny Dose Conversion Factors (DCF) for Real Population of a City

Dose conversion factor (DCF) of inhaled radon short lived progeny in human lung is defined as weighted effective dose in lung per unit exposure to radon progeny. It is given in units mSv/WLM. Calculation of DCF was conducted through the several successive steps by means of home written FORTRAN90 code. By using standard aerosol and subject related parameters, our code gave a value for DCF=16 mSv/WLM, that is close to 15 mSv/WLM that was recommended by ICRP66 (Marsh and Birchall). Then, we have varied subject related parameters based on statistical data about real population of Nis, city in the southeastern part of Serbia. Inhalation parameters and lung ventilation parameters have been varied according to sex, age and the kind of physical activity. Other parameters related to the atmosphere, weighting factors and the epithelia thickness have been kept on their best estimates. In this way a distribution of DCF for one real population has been acquired. It has been found that DCF is log normally distributed. (author)