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radon concentrations in ore mines of baluchistan:

Radon concentrations in coal mines of Baluchistan ...

2000-4-1 · The Sor Range coal mines cover an area of nearly 80 km 2 and lie within the Quetta-Kalat Districts of Baluchistan, Pakistan. The study area containing coal mines is comprised of sedimentary rocks of Jurassic (135–180 million years) to recent age as shown in Fig. 1.The main lithologies are limestones, shales, sandstones and conglomerates (Ahmad & Gauhar, 1986; Ghazanavi, 1988).

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(PDF) Radon concentrations in coal mines of Baluchistan ...

The radon concentration varied from 121 to 408 Bq m−3 in the mines under study. The computed radon dose varied from 1.38 to 4.67 mSv yr−1 with an average of 2.19±0.5 mSv yr−1. These coal ...

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(PDF) Radon concentrations in coal mines of Baluchistan ...

Prolonged exposure to radon, the largest source (69%) of natural radioactivity, may cause lung cancer and bronchial tissue damage. So monitoring of radon at places of high radioactivity and in underground mines is important to assess the radiological

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Risk assessment of radon in soil collected from chromite ...

2019-11-1 · Radon concentration in soil samples collected from chromite mines of Khanozai and Muslim Bagh were measured using CR-39 track detector. The average values of radon concentration in Khanozai and Muslim Bagh chromite mines were found 1.23 ± 0.69 and 1.26 ± 0.08 kBq/m 3, respectively.

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Estimation of radon concentrations in coal mines using a ...

Estimation of radon concentrations in coal mines using a hybrid technique calibration curve. Jamil K (1), Ali S. Author information: (1)Environmental Radiation Group, Radiation Physics Division, PINSTECH, P.O. Nilore, Islamabad, Pakistan. [email protected] The results of epidemiological studies in various countries show that radon and ...

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A review of radon measurement studies in Pakistan -

2008-8-20 · Qureshi et al have reported a variation in radon concentrations ranging from 121 to 408 Bq m −3 in the Balochistan coal mines. Jamil and Ali (2001) have reported the maximum value of 782 ± 125 Bq m −3 for radon concentration in coal mines of Khushab, Punjab.

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Radon - National Mining Association

Radon Concentrations Found in US Uranium Mines in 1949 to 1950* * Holaday and Doyle, 1964 Area # of Mines Range of Radon Concentrations (pCi L−1) Median Value (pCi L−1) Navajo reservation 4 37 –7,500 345 Utah 10 100 –50,000 5,000 Colorado 24 135 –22,300 2,540

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(PDF) Measurement of radon concentration levels in ...

The observed radon concentration levels in the houses varied from 52.68 ± 17.56 to 183.96 ± 31.10 Bqm-3 with an average value of 126.25 ±23.57 Bqm-3. The kucha, pucka and semipucka houses have ...

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Radon Health Mines | Encyclopedia

2021-10-25 · Radon Health MinesWith Daughter Watching, Woman Lying by Bags of Uranium Ore, Used to Increase Radon Gas in the MinesPhotograph By: Carl IwasakiDate: June 1, 1952Source: Time Life Pictures/Getty Images.About the Photographer: This photograph was taken in the Free Enterprise Mine, a "radon health mine" in Boulder, Montana, in 1952. Source for information on Radon Health Mines:

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IONIZING RADIATION: SOURCES AND BIOLOGICAL

2016-6-22 · earlier inhalation of high concentrations of radon in mines [C8, H26]. C. SPECIAL QUANTITIES AND UNITS 12. The potential alpha energy Epot.at of an atom in the decay chain of radon or thoron is the total alpha energy emitted during the decay of this atom to mipb or 208Pb, respectively. The potential alpha energy per unit of

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A review of radon measurement studies in Pakistan

2019-6-17 · underground mines, radon monitoring was done in some coal mines of Baluchistan (Qureshi et al 2000). These measurements were based upon the passive detection of radon using CN-85 track detectors in box type dosimeters. Similarly, Akber et al (1980) have carried out experiments concerning the usefulness of an alpha sensitive plastic SSNTD for radon

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A review of radon measurement studies in Pakistan -

2008-8-20 · Qureshi et al have reported a variation in radon concentrations ranging from 121 to 408 Bq m −3 in the Balochistan coal mines. Jamil and Ali (2001) have reported the maximum value of 782 ± 125 Bq m −3 for radon concentration in coal mines of Khushab, Punjab.

Read More
Estimation of radon concentrations in coal mines using a ...

Estimation of radon concentrations in coal mines using a hybrid technique calibration curve. Jamil K (1), Ali S. Author information: (1)Environmental Radiation Group, Radiation Physics Division, PINSTECH, P.O. Nilore, Islamabad, Pakistan. [email protected] The results of epidemiological studies in various countries show that radon and ...

Read More
A comprehensive review on sources of radon and factors ...

2016-4-1 · The ore body, broken ore, backfill tailings and mine water are the main sources of radon in underground uranium mine environment. Radon atoms formed from the decay of 226 Ra within the solid grains of the materials may not be released to the pore space due to their very low diffusion coefficients (10 −25 –10 −27 m 2 s −1) in solid grains (Nazaroff et al. 1988; Semkow 1991).

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Wang Radon Concentration Phosphate Mine

2019-11-6 · Zhangjiahe Formation, and the measured value is 6.13 kBq/m3. The radon concentrations in soil gas in the Dengying Formation and the Phosphorus-bearing stratum are generally high. The average soil radon concentration in the three phosphate mines in the study area is basically consistent with the measurement results of phosphate mines in Guizhou ...

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Radon-222 Exposure and Dose Concentration Levels in ...

2020-10-17 · Exposure to high concentrations of radon gas is the leading cause of lung cancer for nonsmokers according to the World Health Organization (WHO) figures. With poor ventilation standards and lack of awareness among Jordanians, constant monitoring of radon concentrations is vital. Multiple efforts have been made since the 1990s in order to create a national radon map of Jordan, by

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of Theses and Research 11 - CORE

2016-10-18 · G. Gillmore et al.: Radon concentrations in abandoned mines, Cumbria, UK 1313 1978). The mines in the valley visited in this study also in-cluded the Bonser (alternative spelling “Bonsor”) Mine. Since the 1950s, the copper mines of Coniston have been of

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Radon 10043-92-2 wiki

5.6 Protective Equipment and Clothing /UNDERGROUND MINES/ Respiratory protection must be used by miners when work practices and engineering controls are not adequate to limit average work shift concentration of radon progeny to 1/12 the average work

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OZM Radiation Assessment

2019-1-21 · the air quality modelling to provide calculated long term average radon concentrations at the locations of interest. A summary of the radon emission rates is shown in Table 3. Table 3: Estimated Radon Releases Source Radon (MBq/s) Mine exhausts and Processing Plant 6.06 ROM Stockpile 0.02 Surface Waste Rock Stockpiles 0.001

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IONIZING RADIATION: SOURCES AND BIOLOGICAL

2016-6-22 · earlier inhalation of high concentrations of radon in mines [C8, H26]. C. SPECIAL QUANTITIES AND UNITS 12. The potential alpha energy Epot.at of an atom in the decay chain of radon or thoron is the total alpha energy emitted during the decay of this atom to mipb or 208Pb, respectively. The potential alpha energy per unit of

Read More
A review of radon measurement studies in Pakistan

2019-6-17 · underground mines, radon monitoring was done in some coal mines of Baluchistan (Qureshi et al 2000). These measurements were based upon the passive detection of radon using CN-85 track detectors in box type dosimeters. Similarly, Akber et al (1980) have carried out experiments concerning the usefulness of an alpha sensitive plastic SSNTD for radon

Read More
Estimation of radon concentrations in coal mines using a ...

Estimation of radon concentrations in coal mines using a hybrid technique calibration curve. Jamil K (1), Ali S. Author information: (1)Environmental Radiation Group, Radiation Physics Division, PINSTECH, P.O. Nilore, Islamabad, Pakistan. [email protected] The results of epidemiological studies in various countries show that radon and ...

Read More
A comprehensive review on sources of radon and factors ...

2016-4-1 · The ore body, broken ore, backfill tailings and mine water are the main sources of radon in underground uranium mine environment. Radon atoms formed from the decay of 226 Ra within the solid grains of the materials may not be released to the pore space due to their very low diffusion coefficients (10 −25 –10 −27 m 2 s −1) in solid grains (Nazaroff et al. 1988; Semkow 1991).

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RADON IN MINES OF KRYVYI RIH IRON ORE BASIN IN

The first studies of radiation exposure in old mines of Kryvyi Rih Iron Ore Basin (Kryvbas) began relatively recently, about 20 years ago. The results of these studies have shown that the problem of radon is present in the major part of the Basin mines. In 6 of 8 mines tested, an excess of radiation

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Wang Radon Concentration Phosphate Mine

2019-11-6 · Zhangjiahe Formation, and the measured value is 6.13 kBq/m3. The radon concentrations in soil gas in the Dengying Formation and the Phosphorus-bearing stratum are generally high. The average soil radon concentration in the three phosphate mines in the study area is basically consistent with the measurement results of phosphate mines in Guizhou ...

Read More
Radon-222 Exposure and Dose Concentration Levels in ...

2020-10-17 · Exposure to high concentrations of radon gas is the leading cause of lung cancer for nonsmokers according to the World Health Organization (WHO) figures. With poor ventilation standards and lack of awareness among Jordanians, constant monitoring of radon concentrations is vital. Multiple efforts have been made since the 1990s in order to create a national radon map of Jordan, by

Read More
of Theses and Research 11 - CORE

2016-10-18 · G. Gillmore et al.: Radon concentrations in abandoned mines, Cumbria, UK 1313 1978). The mines in the valley visited in this study also in-cluded the Bonser (alternative spelling “Bonsor”) Mine. Since the 1950s, the copper mines of Coniston have been of

Read More
OZM Radiation Assessment

2019-1-21 · the air quality modelling to provide calculated long term average radon concentrations at the locations of interest. A summary of the radon emission rates is shown in Table 3. Table 3: Estimated Radon Releases Source Radon (MBq/s) Mine exhausts and Processing Plant 6.06 ROM Stockpile 0.02 Surface Waste Rock Stockpiles 0.001

Read More
Mining and underground excavation - stuk-en - STUK

Also underground mines other than uranium mines may contain radon. The entry of radon from a mining area into the air and the environment depends on factors such as the uranium content of the ore and the mining method used. Adverse impacts can be

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Radon and Health - Canadian Nuclear Safety Commission

2012-6-22 · Radon-222 is the radon isotope that causes the most concern, because of the natural abundance of Uranium-238 in the earth’s crust and the health effects of its further decay products. • Radon-219 is formed during the decay of Uranium-235 [1]. • Radon-220 (also known as thoron) is formed during the decay of Thorium-232 [1].

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