Estimation of indoor radon and thoron levels along with their progeny in dwellings of Roopnagar District of Punjab, India

In the present work, an exertion has been made to assess the indoor 222Rn and 220Rn levels in dwellings of a Roopnagar district of Punjab, India. These estimations have been done in the rainy, winter, autumn and summer season. The average indoor radon concentration is 44 ± 14.08 Bq m−3, 57.40 ± 17.61 Bq m−3, 32.38 ± 12.59 Bq m−3 and 31.38 ± 7.48 Bq m−3 and thoron concentration are 56.91 ± 19.75 Bq m−3, 64.45 ± 23.90 Bq m−3, 45.98 ± 19.38 Bq m−3 and 43.39 ± 10.45 Bq m−3 for rainy, winter, autumn and summer seasons, respectively. The mean value of equilibrium equivalent radon and thoron concentration during the rainy season is 11.25 ± 2.91 Bq m−3 and 0.62 ± 0.14 Bq m−3 and during winter season is 13.36 ± 3.36 Bq m−3 and 0.85 ± 0.34 Bq m−3 respectively. For autumn season these values are 9.58 ± 1.43 Bq m−3 and 0.46 ± 0.11 Bq m−3, respectively. For summer season these values are 12.10 ± 1.57 Bq m−3 and 0.57 ± 0.99 Bq m−3, respectively. The annual inhalation dose comes out to be 0.98 ± 0.16 mSv.