Radon exhalation rate studies in Makum coalfield area using track-etched detectors

Barooah, Debajyoti; Goswami, A.; Laskar, I.

doi:10.1007/s12648-009-0095-y

Cited by 15 publications

(8 citation statements)

References 20 publications

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“…The radon exhalation rate per unit energy (E A ) and per unit mass (E M ) of the studied samples are calculated using the following relations, respectively [Surinder et al, 2006, Barooah et al, 2009and Joga et al, 2009:…”

Section: Calculationsmentioning

confidence: 99%

Measurement of Radon Exhalation Rate from Pottery Meal Dishes in Erbil City by using Passive and Active Techniques

Haji¹,

Ahmed²

2012

KUJSS

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Solid State Nuclear Track Detectors (SSNTDs) of type CR-39 has been used in this study as a passive method to measure the radon activity concentration, radon exhalation rate (in terms of area and mass), and effective radon content in the pottery meal dishes of different origins (Germany, England, China, and Iran) in Erbil city. The RAD7 solid state detector has also used as an active method for measuring the radon activity concentrations from the measurement of alpha-particle track density. The results reveal that the highest exhalation rate and effective radium content of 0.690.035 mBq.m-2 .h-1 and 0.258±0.013 Bq.Kg-1 , respectively, were found in England meal dishes; while the lowest exhalation rate and effective radium content of 0.1960.0098 mBq.m-2 .h-1 and 0.106±0.005 Bq.Kg-1 , respectively, were found in China meal dishes. It is concluded that the radon exhalation rate from the pottery dishes has significant contribution to the indoor doses that should be taken into account.

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Section: Calculationsmentioning

confidence: 99%

Measurement of Radon Exhalation Rate from Pottery Meal Dishes in Erbil City by using Passive and Active Techniques

Haji¹,

Ahmed²

2012

KUJSS

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“…The primeval radioisotope uranium ( 238 U) can be found in detectable levels in most of the soils and rocks present in the Earth's crust, and it disintegrates into radium ( 226 Ra), which then decays to form radon ( 222 Rn). The radon concentration on the Earth's surface is determined by the quantity of radium present in the soil and rocks [Abbas et al 2020, Barooah et al 2009. Radon ( 222 Rn) is a chemically inert gas, radioactive in nature and is found in the natural decay series of uranium.…”

Section: Introductionmentioning

confidence: 99%

Assessment of radon exhalation rates, effective radium content and radiological exposure dose, of coal and rocks in Tiru Valley Coal Field, India using track etched technique

Gogoi¹,

Barooah²

2022

Phys. Scr.

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In this study, the outcomes of assessments of radon exhalation rates for both mass and surface, radium content and annual effective dose from 45 numbers of geological samples in Tiru Valley Coal Field area are presented. The nuclear track detector LR-115 (II) of bulk etch rate, VB = 4 µm h-1 with a spark counter to archive alpha track density of radon was used to measure radon exhalation rate from the samples and to assess radiological exposure in the coalfield area, which has significant geological characteristics. In this work, the surface exhalation rates for coal, carbonaceous shale and sandstone samples have been estimated to be in the range of 217.4-659.9 mBq m-2 h-1, 234.0-381.1 mBq m-2 h-1 and 337.1-741.4 mBq m-2 h-1, respectively. The mass exhalation rates for coal, carbonaceous shale and sandstone samples varied in the range of 6.5-19.8 mBq kg–1 h-1, 7.0-11.4 mBq kg–1 h-1, and 10.1-22.2 mBq kg–1 h-1, respectively. The radium contents have been found to vary in the range of 6.7-20.3 Bq kg-1, 7.2-11.8 Bq kg-1 and 10.4-22.9 Bq kg-1 for coal, carbonaceous shale and sandstone respectively. The annual effective doses related to the inhalation of radon from the exposure to the samples have been estimated to be in the range of 15.8-47.9 µSv y-1, 17.0-27.7 µSv y-1 and 24.5-53.8 µSv y-1 for coal, carbonaceous shale and sandstone respectively. In this investigation, the lifetime fatality-risks have also been assessed. The values were generally higher in rock samples than in coal. However, the findings have shown that the obtained values are within the internationally accepted recommended values.

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“…Radon is found in air, rock, soil, water, and it is indicate the presence of radium and its ultimate precursor uranium in the ground. The vast variation in radon exposure depends on location considered and is mainly governed by the exhalation rate (i.e., the amount of activity released per unit area of the surface per unit time) from the ground [4], [5]. Measurement of radon exhalation rates from soil and rocks is useful in studying the health risks [6] [7].…”

Section: Introductionmentioning

confidence: 99%

Measurement of Radon Concentration Using SSNTD in Bartella Region

Kheder¹

2019

MJS

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The alpha-radioactive inert gas Radon exhalation is associated with presence of Radium and its ultimate precursor uranium in the earth crust. Uranium decay deposits radon in soil, which is harmful on human and environment. The exposure of population to high concentration of alpha radioactivity mainly of Radon for a long period leads to lung cancer. The radon activity concentrations, radium contents, radon exhalation rates in twenty one soil samples collected from Bartella region, were measured using the sealed-can technique based on the CR-39 SSNTDs. In the present paper the estimated values for radon activity concentration in air space are in the range 323.2-2424 Bq/m 3 with mean value of 1212.7 Bq/m 3 , the radon concentration in soil sample are 31.66-237.46 KBq/m 3 with mean value of 118.83 KBq/m 3 , the radium contents were found vary between 1.36-10.24 Bq/Kg with mean value 5.11 Bq/Kg, the radon mass exhalation rate vary between 10.34-77.56 mBq/Kg/hr with mean 38.81 mBq/Kg/hr, the radon surface exhalation rate are between 234.2-1756.4 mBq/m 2 /hr with mean value of 878.6 mBq/m 2 /hr. All values of the samples under the test are below of permissible values 370 Bq/Kg of radium content and 57600 mBq/m 2 /hr radon exhalation, recommended by Organization for Economic Cooperation and Development (OECD). Hence the area under investigation is safe as for as health hazards of radium and safe in radiological risks due to radon exposure from the soil.

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Radon exhalation rate studies in Makum coalfield area using track-etched detectors

Cited by 15 publications

References 20 publications

Measurement of Radon Exhalation Rate from Pottery Meal Dishes in Erbil City by using Passive and Active Techniques

Measurement of Radon Exhalation Rate from Pottery Meal Dishes in Erbil City by using Passive and Active Techniques

Assessment of radon exhalation rates, effective radium content and radiological exposure dose, of coal and rocks in Tiru Valley Coal Field, India using track etched technique

Measurement of Radon Concentration Using SSNTD in Bartella Region

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