A comparative study of indoor radon levels and inhalation dose in some areas of Punjab and Haryana, India |
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Authors: | B S Bajwa Harmanjit Singh Joga Singh and Surinder Singh |
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Institution: | (1) Department of Earth Science, University of Bergen, Allegata 41, 5007 Bergen, Norway;(2) Sogn og Fjordane University College, P.O. Box 133, 6856 Sogndal, Norway;(3) Interconsult ASA, P.O. Box. 6051, 5892 Bergen, Norway;(4) Norwegian Radiation Protection Authorities, P.O. Box 55, 1332 Österås, Norway;(5) Sörlandskonsult A/S, Vesterveien 6, 4613 Kristiansand, Norway |
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Abstract: | Indoor radon concentrations have been measured for two consecutive half-year periods in a wide range of dwellings of some
regions of Punjab and Haryana states. The objective was to find correlation between the variations of indoor radon levels
with the sub-soil, local geology, type of building materials, etc. of the two regions. So keeping this in view the indoor
radon measurements have been carried out in the dwellings of different villages around the Tusham ring complex, Bhiwani District,
Haryana, known to be composed of acidic volcanics and the associated granites along with some villages of Amritsar District,
Punjab. The indoor radon concentration in the dwellings around Tusham (Haryana) have been found to be varying from 120.5±95
to 915.2±233 Bq m−3, whereas it ranges from 60.0±37 to 235.6±96 Bq m−3 for the dwellings of Punjab. The 222Rn concentration observed at most of locations particularly around Tusham ring complex region is higher than that of all the
villages studied in Punjab region. Local geology including embedded granitic rocks, sub-soil, etc. as well as building materials
having higher radioactive content are the major contributors for the higher indoor radon levels observed in the dwelling around
Tusham, where few dwellings have higher radon concentrations than the ICRP, 1993 recommendations. The annual effective dose
equivalent has also been estimated for each location of the both regions, which has been found to be varying from 1.0 to 17.2
mSv/y. |
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