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Risk assessment from gamma dose rate in Balod District of Chhattisgarh, India


People are generally exposed to the natural radiation that presents inside and outside the houses. This investigation has been carried out gamma dose rate of 52 areas of Balod district, Chhattisgarh India. The values of outdoor and indoor gamma dose rates observed were 103.0 ± 3.1 to 201.0 ± 6.0 and 132.0 ± 4.0 to 260.0 ± 7.8 nSv/h, respectively. Indoor to outdoor gamma dose ratio was found to be 1.37. Total average annual effective dose value found to be slightly higher than the world population weighted average. Excess lifetime cancer risk was found to be 5.0 × 10−3 to 5.2 × 10−3 for a few places.