Natural radioactivity in soil samples of Yelagiri Hills, Tamil Nadu, India and the associated radiation hazards

Ravisankar, R.; Chandrasekaran, A.; Vijayagopal, P; Venkatraman, B.; Senthilkumar, G.; Eswaran, P.; Rajalakshmi, A.

doi:10.1016/j.radphyschem.2012.07.003

Cited by 57 publications

(14 citation statements)

References 13 publications

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“…The other criteria to evaluate radiological suitability of natural radionuclides for collected samples are external and internal radiation hazard indices and these indices are calculated by the following equations (8,9) :…”

Section: External (H Ex ) and Internal (H In ) Radiation Hazard Indicesmentioning

confidence: 99%

Measurement of radioactivity levels and assessment of radioactivity hazards of soil samples in Karaman, Turkey

Ağar

Boztosun

Korkmaz

et al. 2014

Radiation Protection Dosimetry

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In this study, the levels of the natural and artificial radioactivity in soil samples collected from surrounding of Karaman in Turkey were measured. Activity concentrations of the concerned radionuclides were determined by gamma-ray spectrometry using a high-purity germanium detector with a relative efficiency of 40 % at 1.332 MeV. The results obtained for the (238)U series ((226)Ra, (214)Pb and (214)Bi), (232)Th series ((228)Ac), (40)K and fission product (137)Cs are discussed. To evaluate the radiological hazard of radioactivity in samples, the radium equivalent activity (Raeq), the absorbed dose rate (D), the annual effective dose and the external (Hex) and internal hazard index (Hin) were calculated and presented in comparison with the data collected from different areas in the world and Turkey.

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Section: External (H Ex ) and Internal (H In ) Radiation Hazard Indicesmentioning

confidence: 99%

Measurement of radioactivity levels and assessment of radioactivity hazards of soil samples in Karaman, Turkey

Ağar

Boztosun

Korkmaz

et al. 2014

Radiation Protection Dosimetry

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“…Soil is the most significant contributor to indoor radon and thoron concentration due to its higher radionuclide content. 29,30 Study of exhalation of indoor radon and thoron from soil is important for indoor radon-thoron level measurements. 6 Indoor radon and thoron concentrations from dwellings would depend mainly on radium and thorium contents in source term, seasons and ventilation.…”

Section: Radon and Thoron Exhalation Rates From Soil Samplesmentioning

confidence: 99%

Ventilation effect on indoor radon–thoron levels in dwellings and correlation with soil exhalation rates

Chauhan

Kumar

Chauhan

et al. 2014

Indoor and Built Environment

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This paper reports the measurements of indoor radon and thoron concentrations in selected Northern Indian dwellings (differing in ventilation rate). These were carried out using single entry pin hole based radon thoron dosimeters. In order to correlate the indoor levels with source term, the radon and thoron exhalation rates from soil samples collected from the same dwellings were also measured. Active measurement techniques with scintillation radon monitor and scintillation thoron monitor were used for exhalation measurements from soil sample. For thoron exhalation rate measurements, a small volume chamber was used. The indoor radon and thoron concentration in different rooms varied from 14 to 97 Bq/m3 and 23 to 189 Bq/m3, respectively. The radon mass exhalation and thoron mass emanation rates of soil samples varied from 28.2 to 91.2 mBq/kg/h and 3.42 to 12.1 mBq/kg/h, respectively. A weak correlation was found between indoor concentration and soil exhalation rates for these dwellings. Indoor radon concentrations from various rooms in the dwellings were lower than the limit (100 Bq/m3) recommended by WHO (2009).

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“…The energy calibration is required for various energies of radionuclides in the measurement of activity concentrations for the detector geometry size and selected samples. As the measurement is for the natural radioactive elements 40 K, uranium and thorium, the gamma energies selected are 1460 keV for 40 K, 1763 keV (from daughter product 214 Bi) for uranium and 2614 keV (from daughter product 208 Tl) for thorium [15] . The detection limit of NaI(Tl) detector system for 40 K, 238 U and 232 Th are 8.50, 2.21 and 2.11 Bq kg –1 respectively for a counting time of 20, 000 seconds.…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Data on natural radioactivity and associated radiation hazards in coastal sediment of Chennai Coast, Tamilnadu, India using gamma ray spectrometry

Tholkappian¹,

Ganesh

Devanesan³

et al. 2018

Data in Brief

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This article contains data on the activity concentration of natural radionuclides in coastal sediment samples collected from Pulicat Lake to Vadanemmeli, East coast of Tamil Nadu using NaI(Tl) detector based γ-spectrometry. As marine sediments are found to be the repository of many radioactive pollutants, studied the objectives like (i) determine natural radionuclide activity concentrations in sediment samples in and around Chennai coast (ii) evaluate the radiological hazards due to natural radioactivity associated with coastal sediments and (iii) identify areas which may be radiological hazardous for the public along the study area. The average activity concentration of 238U, 232Th and 40K in the present study is lower than world median value. The radiological hazard indices such as External hazard index (Hex) and Gamma representative level index, (Iγ) were evaluated to assess radiation hazard associated with the sediments. The simulated results show sediments do not pose any significant radiation hazards due to concentration of natural radionuclides.

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Natural radioactivity in soil samples of Yelagiri Hills, Tamil Nadu, India and the associated radiation hazards

Cited by 57 publications

References 13 publications

Measurement of radioactivity levels and assessment of radioactivity hazards of soil samples in Karaman, Turkey

Measurement of radioactivity levels and assessment of radioactivity hazards of soil samples in Karaman, Turkey

Ventilation effect on indoor radon–thoron levels in dwellings and correlation with soil exhalation rates

Data on natural radioactivity and associated radiation hazards in coastal sediment of Chennai Coast, Tamilnadu, India using gamma ray spectrometry

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