INDOOR RADON ACTIVITY CONCENTRATIONS IN NONGSTOIN TOWN, WEST KHASI HILLS DISTRICT, MEGHALAYA

Abstract

Inhalation of Radon (²²²Rn) and its progeny are the major sources of natural background radiation exposure. The present paper reports the result of an indoor Radon study carried out in dwellings of Nongstoin town located in West Khasi Hills District, Meghalaya, India. The survey is carried out using LR-115 type2 Solid State Nuclear Tracks Detectors (SSNTDS) in the bare mode. The overall radon activity concentration measured has been found to vary from 11.1 to 389.7 Bq.m^-3 with an arithmetic mean value of 61.1 ± 76.5 Bq.m^-3 and a geometric mean value of 41.6±2.24 Bq.m^-3. The measured dose received by the residents is found to be well below the limits prescribed by World Health Organization.