THE INFLUENCE OF THE RADON VARIABILITY ON DOSE ASSESSMENT VLADIMIR UDOVIČIĆ1, ALEKSANDAR DRAGIĆ1, RADOMIR BANJANAC1, DEJAN JOKOVIĆ1, BOJANA GRABEŽ1, JELENA FILIPOVIĆ2, ZORA S. ŽUNIĆ2 1Institute of Physics, University of Belgrade, Serbia udovicic@ipb.ac.rs 2Institute of Nuclear Sciences “Vinča”, ECE LAB, University of Belgrade, Serbia, ecelab@vinca.rs

- Epidemiological assessments (ICRP) - Physical dosimetry (UNSCEAR) MOTIVATION ANNUAL RADON DOSE ASSESSMENTS (mSv) INDOOR RADON CONCENTRATION (Bqm-3) MODELS: - Epidemiological assessments (ICRP) - Physical dosimetry (UNSCEAR)

RADON MEASUREMENTS Short-term measurements: - This type of measurements are performed with much more complex and expensive passive or active (pump air sampling) continuous measuring devices. - Temporal distribution Long-term measurements: Passive integrated measuring devices based on the nuclear track detectors, which is due to their low cost, simplicity and characteristics have ability to collect information from a large number of the measurement points at the same time. Spatial distribution

SHORT-TERM RADON MEASUREMENTS RESULTS: Indoor radon measurements performed in the August and September for the three days in the living room

SHORT-TERM RADON MEASUREMENTS RESULTS: Indoor radon measurements performed in the August and September for the three days in the bedroom

SHORT-TERM RADON MEASUREMENTS RESULTS: Month Living room Mean/Averaged from 16 to 24 hours Bedroom Mean/Averaged from 24 to 08 hours August 50.50/58.71 64.96/58.98 September 150.05/66.26 210.74/278.48

CONCLUSIONS The results presented in this work show that it is difficult to estimate the annual radon concentration due to the very complex indoor radon behavior. This task is not trivial and mostly influenced by the radon variability.

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