Estimation of Equilibrium Factor, Equilibrium Equivalent Concentration and its Seasonal Variation in Indoor Atmosphere by Using Solid State Nuclear Track Detector (SSNTD) Technique
نویسنده
چکیده
Estimation of equilibrium factor (F), equilibrium equivalent concentration (EEC), inhalation dose and its seasonal variation in indoor atmosphere of Hardoi District were carried out in sixty dwellings of 10 different villages. In the present study the average values of radon and thoron equilibrium factor was found to 0.26 and 0.06 respectively in summer season, 0.31 and 0.05 respectively in rainy season, 0.32 and 0.15 respectively in autumn season, 0.37and 0.17 respectively in winter season. The average values radon and thoron equilibrium equivalent concentration (EEC) was found to 4.88 Bqmand 0.96 Bqm in summer season, 7.56 Bqm and 0.96 Bqm in rainy season, 9.66 Bqmand 3.22 Bqm in autumn season , 14.80 Bqm and 4.25 Bqm respectively in winter season. The total inhalation dose was found to vary from 0.2 mSvy to 0.69 mSvy with an average value of 0.61 mSvy in summer season, 0.33 mSvy to 1.93 mSvy with an average value of 0.60 mSvy in rainy season, 0.16 mSvy to 3.16 mSvy with an average value of 1.57 mSvy in autumn season, and 1.0 mSvy to 4.38 mSvy with an average value of 2.19 mSvy in winter season. The equilibrium factor was found close to the worldwide value (0.4) for indoor condition. At all the places, the average inhalation dose was found below to the action level 3-10 mSvy as recommended by the International Commission on Radiation Protection (ICRP).
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