Measurement of radon concentration for assessment of the radiological hazard in the Chakwal coalmines of the Salt Range, Pakistan.

摘要: Radon and its progeny are prevalent everywhere on the lithosphere especially in mining environment. Coal exists Salt Range that passes through Pakistan. The aim of present study was to measure radon concentration assess associated radiological hazard coalmines developed portion which district Chakwal Among various coalfield, five were selected for survey. A passive integrated technique consisting SSNTDs (solid state nuclear track detectors) employed measurement these coalmines. Box type dosimeters containing CN-85 detectors placed three months at six locations every coalmine. After removing dosimeters, etched alkaline solution enlarge alpha tracks counted under an optical microscope. densities converted concentration. average varied range 50?114? Bq?m?3. exhalation rates from samples coal shale collected determined be respectively 934 (830?1010) 1302 (1020?1580)? mBq?m?2?h?1. radiation dose corresponding health risk mine workers also estimated.