Analysis of seasonal variation of indoor radon concentration in Tehri Garhwal, Northern India

Kandari, M. S.; Ramola, R. C.

doi:10.1007/s12648-009-0062-7

Cited by 15 publications

(4 citation statements)

References 2 publications

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“…In Table 4, a comparison of winter to summer ratio of indoor radon observed in present study with the literature reports has been discussed. The winter to summer ratio of indoor radon of Muktsar, Ferozpur 22 and Malwa region of Punjab 23 , Western Haryana of India 24 , Kullu area of Himachal Pradesh 19 , Tehri Garwal of Uttarakhand 25 , Sikar and Churu district of Northern Rajasthan 26 , India is lower than the present investigated values.…”

Section: Resultscontrasting

confidence: 76%

Radiological variation of indoor radon and thoron levels by pinhole dosimeter in different seasons

Mittal

Rani²,

Mehra

et al. 2017

Indoor and Built Environment

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The annual variation in radon and thoron concentrations in different seasons has been revealed for 40 different locations of Jodhpur, Nagaur, Bikaner and Jhunjhunu districts of Northern Rajasthan by using pinhole dosimeter, and the results have been compared with ventilation conditions and building materials. The indoor radon concentration was observed to vary from 109 ± 17 to 334 ± 13 Bq m−3, 63 ± 17 to 255 ± 21 Bq m−3, 45 ± 11 to 128 ± 19 Bq m−3 and 74 ± 9 to 300 ± 21 Bq m−3 and thoron concentration varies from 26 ± 15 to 418 ± 21 Bq m−3, 3 ± 2 to 134 ± 33 Bq m−3, 12 ± 6 to 140 ± 19 Bq m−3 and 6 ± 4 to 408 ± 29 Bq m−3 for winter, spring, summer and autumn seasons, respectively. In winter season, indoor radon concentration of about 50% dwellings was observed to be within or higher than the action level as recommended by International Commission of Radiation Protection. However, in summer the action level is lower than the action limit. The exposure of human beings to indoor radon and thoron and the associated risk has also been examined. The total annual mean effective dose due to indoor radon and thoron in Northern Rajasthan are less than or close to the action level 3–10 mSv y−1 as recommended by International Commission of Radiation Protection.

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Section: Resultscontrasting

confidence: 76%

Radiological variation of indoor radon and thoron levels by pinhole dosimeter in different seasons

Mittal

Rani²,

Mehra

et al. 2017

Indoor and Built Environment

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“…Kansal et al 8 reported winter to summer ratio of indoor radon in the range of 0.78-2.99 with an average of 1.52 in the Western Haryana, India. The winter to summer ratio of indoor radon in Kullu area of Himachal Pradesh, India lies in the range of 1.08-1.96 with an average of 1.54 as reported by Singh et al 20 Kandari and Ramola 28 reported winter to summer ratio of indoor radon in the range of 0.63-1.64 with an average of 1.16 in the Tehri Garhwal region of Northern India. Rani et al 29 reported winter to summer ratio of indoor radon in the range of 1.15-1.62 with an average of 1.31 in the Punjab and Himachal Pradesh states of India.…”

Section: Resultsmentioning

confidence: 72%

“…Kandari and Ramola 28 reported winter to summer ratio of indoor radon in the range of 0.63–1.64 with an average of 1.16 in the Tehri Garhwal region of Northern India. Rani et al.…”

Section: Resultsmentioning

confidence: 99%

Measurement of indoor radon concentration and assessment of doses in different districts of Northern Rajasthan, India

Duggal

Rani²,

Mehra

2013

Indoor and Built Environment

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Radon (222Rn), the immediate decay product of radium, is a causative agent of lung cancer. The seasonal indoor radon concentration in houses with different floorings, walls and roofs has been measured in Northern Rajasthan, India. The measurements were made in 100 houses using LR-115-type II plastic track detectors over four successive three-month periods (winter, spring, summer and autumn). The mean values of indoor radon concentrations in winter, spring, summer and autumn were determined to be: 176 Bq m−3, 131 Bq m−3, 120 Bq m−3 and 151 Bq m−3, respectively. The annual average indoor radon concentrations in the dwellings were found to vary from 117 to 215 Bq m−3 with an average of 144 Bq m−3. In ∼10% of the dwellings the indoor radon activity concentration values lies in the range of action level (200–300 Bq m−3) recommended by International Commission on Radiological Protection. The annual effective dose received by the residents of the study area varied from 2.0 to 3.67 mSv with an average of 2.46 mSv. The seasonal variation in indoor radon reveals the maximum value in winter and minimum in summer. The influences of the factors linked to building characteristics in relation to radon measurements were examined.

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“…Wayanad is one of the coldest high range tourist places situated in the Western Ghats of southern India. Several studies have proved the increase in the concentration of indoor radon with decreasing temperature [ 10 – 12 ]. These studies have reported indoor radon thoron levels which are higher than those seen in the High Natural Background Radioactivity Areas (HNBRA) of Kerala.…”

Section: Introductionmentioning

confidence: 99%

Inhalation Dose and Source Term Studies in a Tribal Area of Wayanad, Kerala, India

Bhaskaran

Damodaran

Kumar

et al. 2017

Journal of Environmental and Public Health

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Among radiation exposure pathways to human beings, inhalation dose is the most prominent one. Radon, thoron, and their progeny contribute more than 50 per cent to the annual effective dose due to natural radioactivity. South west coast of India is classified as a High Natural Background Radioactivity Area and large scale data on natural radioactivity and dosimetry are available from these coastal regions including the Neendakara-Chavara belt in the south of Kerala. However, similar studies and reports from the northern part of Kerala are scarce. The present study involves the data collection and analysis of radon, thoron, and progeny concentration in the Wayanad district of Kerala. The radon concentration was found to be within a range of 12–378 Bq/m3. The thoron concentration varied from 15 to 621 Bq/m3. Progeny concentration of radon and thoron and the diurnal variation of radon were also studied. In order to assess source term, wall and floor exhalation studies have been done for the houses showing elevated concentration of radon and thoron. The average values of radon, thoron, and their progeny are found to be above the Indian average as well as the average values reported from the High Natural Background Radioactivity Areas of Kerala. Exhalation studies of the soil samples collected from the vicinity of the houses show that radon mass exhalation rate varied from below detectable limit (BDL) to a maximum of 80 mBq/kg/h. The thoron surface exhalation rate ranged from BDL to 17470 Bq/m2/h.

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Analysis of seasonal variation of indoor radon concentration in Tehri Garhwal, Northern India

Cited by 15 publications

References 2 publications

Radiological variation of indoor radon and thoron levels by pinhole dosimeter in different seasons

Radiological variation of indoor radon and thoron levels by pinhole dosimeter in different seasons

Measurement of indoor radon concentration and assessment of doses in different districts of Northern Rajasthan, India

Inhalation Dose and Source Term Studies in a Tribal Area of Wayanad, Kerala, India

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