Indoor radon concentrations were measured in the main buildings of the two campus sites of the University Aleksandër Moisiu, Durrës. The measurements were performed using the passive method based on solid-state nuclear track detectors (CR-39) in two seasons’ winter and summer, which cover almost the entire period of an academic year. In a few cases, the active method was used to check on diurnal variations of indoor radon concentrations. The average indoor radon concentrations measured in the autumn-winter season (67 measurements in 49 locations) and discussed in this preliminary analysis were found to range from 14 up to 98 Bq m^-3. All the measurements were found to be under the reference level of Albanian legislation for indoor radon concentration in workplaces. No significant differences in radon concentrations were found among buildings and between various floors. The preliminary average effective dose was calculated by using ICRP recommendations considering the standard exposure period was found to be 0.6 mSv/year.

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