Radon exhalation and gamma radioactivity levels in soil and radiation hazard assessment in the surrounding area of National Thermal Power Corporation,Dadri (U.P.), India |
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| Institution: | 1. Department of Applied Science, Vivekananda College of Technology and Management, Aligarh 202 002, Uttar Pradesh, India;2. Department of Applied Physics, Aligarh Muslim University, Aligarh 202 002, Uttar Pradesh, India;3. Department of Physics, S. V. (P. G.) College, Aligarh 202 001, Uttar Pradesh, India;4. Department of Physics, Northern India Engineering College, Delhi 110 053, India;5. Department of Applied Physics, B.B.A. University, Lucknow 226 025, India;1. Department of Applied Sciences, Punjab Technical University, Jalandhar 144601, Punjab, India;2. Department of Applied Science, Ferozepur College of Engineering and Technology, Ferozshah, Ferozepur 142052, Punjab, India;3. Department of Physics, Dr. B.R. Ambedkar National Institute of Technology, Jalandhar 144011, India;1. Department of Applied Science, Ferozepur College of Engineering and Technology, Farozshah, Ferozepur 142052, Punjab, India;2. Department of Applied Sciences, Punjab Technical University, Jalandhar 144601, Punjab, India;3. Department of Physics, Dr. B.R.Ambedkar National Institute of Technology, Jalandhar 144011, India;4. Department of Physics, HNB Garhwal University, Badshahi Thaul Campus, Tehri Garwal 249 199, India;1. Department of Applied Sciences, Guru Kashi University, Talwandi Sabo-151302, Bathinda, Punjab, India;2. Department of Physics, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar 144011, Punjab, India;1. European Commission, Joint Research Centre, Institute for Reference Materials and Measurements (JRC-Geel), Retieseweg 111, B-2440 Geel, Belgium;2. European Commission, Directorate-General for Energy, Euroforum Building, 10, Rue Robert Stumper, L-2557, Luxembourg;1. Department of Chemical Sciences, Tai Solarin University of Education, Ijagun, Ijebu-Ode, Nigeria;2. Department of Chemistry, Federal University of Agriculture Abeokuta, Ogun State, Nigeria;3. Department of Chemistry, Babcock University, Ilishan Remo, Ogun State, Nigeria |
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| Abstract: | In the present study soil samples were collected from the region around a National Thermal Power Corporation (NTPC) at Dadri (U.P.), India. Radon activity and radon exhalation rates were measured by using “sealed can technique” using LR 115-type II nuclear track detectors. Radon activities are found to vary from 177.5 ± 23.1 to 583.4 ± 4.9 Bq m?3 with an average value of 330.5 ± 30.4 Bq m?3. Surface exhalation rates in these samples vary from 63.9 ± 8.3 to 210.2 ± 15.1 mBq m?2 h?1 with an average value of 119.1 ± 11.1 mBq m?2 h?1, whereas mass exhalation rates vary from 2.5 ± 0.3 to 8.1 ± 0.6 mBq kg?1 h?1 with an average of 4.6 ± 0.4 mBq kg?1 h?1.Activity concentrations of naturally occurring radionuclides (226Ra, 232Th and 40K) were also measured in these soil samples using high resolution γ–ray spectroscopic system. Activity concentrations of 226Ra, 232Th, and 40K vary from 32.2 ± 6.0 to120.9 ± 4.5 Bq kg?1, 19.3 ± 0.9 to 44.6 ± 1.5 Bq kg?1 and 195.4 ± 2.8 to 505.4 ± 6.3 Bq kg?1 with overall mean values of 70.0 ± 8.9 Bq kg?1, 34.8 ± 1.2 Bq kg?1 and 436.1 ± 5.6 Bq kg?1 respectively. From the activity concentrations of 226Ra, 232Th and 40K, radium equivalent activity (Raeq) and the external hazard index (Hex) were calculated and found to vary from 73.4 to 214.7 Bq kg?1 and from 0.2 to 0.6 respectively. |
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