Study on Radon Concentration at the Work Places of Mysuru, Bengaluru and Kolar Districts of Karnataka State, South India

Ningappa, C.; Hamsa, K S; Reddy, K. Umesha; Niranjan, Ram; Rangaswamy, D. R.; Sannappa, J.

doi:10.1093/rpd/ncw058

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…The location we have chosen for the present investigations is Bathery region of Wayanad. This region has large number of granite quarries and granite is already known to possess higher radioactivity when compared to other types of rocks [ 13 – 15 ]. It may be of interest to know the effect of granites in terms of radiation dose, when used as construction material for building.…”

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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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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Concentration of Radon in Dwellings of Hemavathi River Basin, Karnataka, India

Niranjan

Ningappa

Yashaswini

2018

Radiation Protection Dosimetry

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Indoor radon, thoron and their progeny levels were measured in various types of dwellings during 2016-17 in Hemavathi river basin, Karnataka by using solid state nuclear track detector based pin-hole dosemeters; dwellings of various types were chosen for the measurement. The dosemeters containing the detector (LR-115, Type II Film) was used for this purpose. The concentration of indoor radon in the study area varied from 30.72 to 196.08 Bq m-3 with a median of 83.13 Bq m-3 and thoron concentration varied from 15.56 to 227.78 Bq m-3. Higher concentrations of radon and its progeny were observed in granite flooring and cement roofing dwellings compared to other types of dwellings. The reason for higher concentration of indoor radon and its progeny is due to activity of radium present in granite and provision of less ventilation in dwellings. The equilibrium equivalent radon, thoron concentrations and annual effective dose are discussed.

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Inhalation dose from exposure to radon, thoron and their progeny in indoors around a nuclear power generation facility in Uttar Pradesh, India

Kumar

Agrawal

et al. 2021

Indoor and Built Environment

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Radon, thoron and their progeny concentration have been measured in dwellings located within a 90 km2 area around a nuclear power plant using solid-state nuclear track detectors. Time-integrated measurements were carried out on a four-month cycle, making three measurements in each dwelling throughout the year. In total, 145 dwellings were selected for the study. The measured values of gas and their progeny concentrations were used to determine the equilibrium factor for radon and thoron indoors and annual inhalation dose. The average value of the equilibrium factor indoors was found to be 0.44 ± 0.23 for radon and 0.015 ± 0.010 for thoron. The annual inhalation dose for the public living around this plant was found to be 0.97 ± 0.55 mSv. Results were analysed for different seasons and different categories of dwellings for their construction type.

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Study on Radon Concentration at the Work Places of Mysuru, Bengaluru and Kolar Districts of Karnataka State, South India

Cited by 3 publications

References 9 publications

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

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

Concentration of Radon in Dwellings of Hemavathi River Basin, Karnataka, India

Inhalation dose from exposure to radon, thoron and their progeny in indoors around a nuclear power generation facility in Uttar Pradesh, India

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