FIRST INSIGHTS INTO RADON EMISSION USING BARE MODE IN RAMPUR DISTRICT OF INDIA

Measurement of radon, thoron concentration and their daughter products in a dwelling of Rampur city and in the surrounding villages were carried out by using Solid-state nuclear track detectors (LR-115 type II) in a bare mode. The detectors were distributed over 32 houses. The indoor radon concentration was found to vary with building material, ventilation condition, occupant’s behavior and mode of constructions of houses. The radon value was found to be lower than recommended value under normal ventilation condition. The indoor radon concentrations were found to vary from 30 Bqm-3 to 85.36Bqm-3 with an average value of 62.36 Bq/m3.This value is lower than the ICRP recommended values of 200Bqm-and thus are within safe limits. The outdoor radon concentration is usually low and less than average indoor levels. It is also found that, in general, the radon level in lower floors is higher than that in upper ones in all houses