Indoor radon concentrations in the town of Podgorica-Montenegro

Abstract Indoor radon survey in the town of Podgorica, capital of Montenegro, was performed in winter season 1994–1995. The town houses were classified on the basis of their construction materials and techniques in 4 distinct types. Radon was measured in 110 dwellings, selected with respect to the types and locations of houses. Measurements were carried out by cellulose nitrate track detectors, exposed for 90 days in living-rooms on ground floors. Equilibrium equivalent concentrations of radon are found to be in (4 – 453) Bq/m 3 range, with a median of 26.4 Bq/m 3 . They belong to a log-normal distribution (geometric mean: 21.8 Bq/m 3 , geometric standard deviation: 2.20 Bq/m 3 ). The detached houses built of bricks have the highest average indoor radon level, and the apartment houses made of concrete and bricks, with plaster on the walls, the lowest one.