2019-10-24 Radon Exposures in a Granite Quarry EXECUTIVE SUMMARY Multiple studies have been published demonstrating that exposures to both radon and direct radiation from granite countertops are very low, and that this is not an issue of concern for homeowners (Allen et al., 2010; Chen et al., 2010; Myatt et al., 2010; Llope, 2011; Allen et al., 2013).
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2021-11-18 Radon Exposure from Granite: Debunking Health Concerns. Like all stone, granite contains trace amounts of radium, which decays over time into a naturally-occurring gas called radon, emitting low levels of radiation. Stone quarry workers are surrounded by massive amounts of granite on a daily basis. Should they be concerned about their health?
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As granite can also present a variable, and occasionally significant, content of naturally occurring radionuclides, they may also face a radiological hazard. In order to assess the risk, a granite industry with a quarry and processing factory was selected to assess the occupational exposure.
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For example, a cross-sectional study on the prevalence of medical symptoms among quarry workers and people living near a granite quarry in Nigeria reported high cough, sinusitis, rhinitis, and ...
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2017-11-14 Granite quarries produce massive amount of dust particles and such dust particles increase the level of Radon gas. (USGAS, 2016). The main way of saving the humans from radiation injuries is to protect it from exposure to radiation and this is why radiation monitoring and measurement are very essential in our society today. II.
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Granite quarries produce massive amount of dust particles and such dust particles increase the level of Radon gas [10]. The main way of saving the humans from radiation injuries is to protect it from exposure to radiation and this is why radiation monitoring and measurement are very essential in our society today. 2. Experimental Procedure
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2018-3-5 Vånga Granite in the quarry is rather uniformly approximately 280 Bq/kg (23 ppm U); the 232Th concentration is 170 Bq/kg (42 ppm Th) and the 40K 1,200 Bq/kg (3.9 % K). The gamma radiation level within the quarry is 0.7 - 0.9 µSv/h and over the tail-ings 0.5 µSv/h. The variation of the gamma radiation depends on how close to
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2017-3-10 1 . Radiation From Granite Countertops . Information Sheet . Summary: Assuming a relatively tight house with an air change rate of 0.5 per hour (h-1) and using average measured dose rates from granite countertop slabs, the estimated radon concentration in kitchen air would be
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As granite can also present a variable, and occasionally significant, content of naturally occurring radionuclides, they may also face a radiological hazard. In order to assess the risk, a granite industry with a quarry and processing factory was selected to assess the occupational exposure.
Read More
2018-3-5 Vånga Granite in the quarry is rather uniformly approximately 280 Bq/kg (23 ppm U); the 232Th concentration is 170 Bq/kg (42 ppm Th) and the 40K 1,200 Bq/kg (3.9 % K). The gamma radiation level within the quarry is 0.7 - 0.9 µSv/h and over the tail-ings 0.5 µSv/h. The variation of the gamma radiation depends on how close to
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Granite Quarry Workers. The workers that are working in the quarry industrial site are at a high risk of exposure to the respirable quarry dust, therefore the health status of those workers should be monitored to determine departures from normal health. Silicosis, lung cancer and other serious respiratory diseases are a common complaint within ...
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The potential occupational exposure in granite quarry industry due to the presence of naturally occurring radioactive material (NORM) has been investigated. ... Man first increased his radiation ...
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2020-2-20 An appraisal of activity concentrations of 40 K, 232 Th, 238 U, radiation exposure levels and the potential radiological hazards in the granite rock of selected quarry sites in Edo State, South-south Nigeria has been carried out using the gamma-ray spectroscopy technique. The results show that these naturally occurring radionuclides are ...
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2016-8-12 As granite can also present a variable, and occasionally significant, content of naturally occurring radionuclides, they may also face a radiological hazard. In order to assess the risk, a granite industry with a quarry and processing factory was selected to assess the occupational exposure.
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2021-4-14 To reduce the risk of lung cancer from exposure to radon, EPA recommends testing all homes for radon, regardless of whether the home contains granite countertops. Call 1-800-SOS-RADON (767-7236) or purchase do-it-yourself home radon test kits at
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2018-1-19 radiation exposure quantity that is useful in some instances, but is not used for the Dose Ranges Chart – the effective dose. Much research has also been devoted to determining radiation sensitivities for risk of cancer in the different tissues and organs of the human body, and this information has been used to produce a list of Tissue Weighting
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2009-8-26 In addition, exposure scenarios for granite countertops do not seem to be considered explicitly in existing screening models for radiation dose from building materials (NCRP, 1987b; Markkanen ...
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To establish the health risk due to the exposure to natural radionuclides in granite on quarry workers, granite end-users and the general public in the study area, the radiation hazard indices were calculated . The mean absorbed dose rate in air in the study area ranged from 4.56 nGyh −1 to 38.10 nGyh −1. This is attributed to the size ...
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The potential occupational exposure in granite quarry industry due to the presence of naturally occurring radioactive material (NORM) has been investigated. ... Man first increased his radiation ...
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2016-8-12 As granite can also present a variable, and occasionally significant, content of naturally occurring radionuclides, they may also face a radiological hazard. In order to assess the risk, a granite industry with a quarry and processing factory was selected to assess the occupational exposure.
Read More
2021-4-14 To reduce the risk of lung cancer from exposure to radon, EPA recommends testing all homes for radon, regardless of whether the home contains granite countertops. Call 1-800-SOS-RADON (767-7236) or purchase do-it-yourself home radon test kits at
Read More
2021-4-6 While granite and other decorative stone can contain some trace natural radioactivity, granite countertops are not considered to be a key contributor to radiation in the average home. Radioactive minerals in the granite can decay into radon – a colorless, odorless, radioactive gas – which may be released from the surface of the granite over ...
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2009-8-26 In addition, exposure scenarios for granite countertops do not seem to be considered explicitly in existing screening models for radiation dose from building materials (NCRP, 1987b; Markkanen ...
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2021-6-2 A comprehensive radiological survey was carried out in an open-cut slate stone quarry. The activity of 226 Ra, 228 Ra and 40 K in the ore samples were measured as 38 ± 5, 41 ± 6 and 869 ± 52 Bq kg 1, respectively.Outdoor radon and indoor radon concentrations were measured from 37 ± 7 to 193 ± 11 Bq m −3 (77 ± 8 Bq m −3), and 49 ± 6 to 253 ± 23 Bq m −3 (131 ± 13 Bq m −3 ...
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Granite Quarry Workers. The workers that are working in the quarry industrial site are at a high risk of exposure to the respirable quarry dust, therefore the health status of those workers should be monitored to determine departures from normal health. Silicosis, lung cancer and other serious respiratory diseases are a common complaint within ...
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2018-10-1 Radiation exposure due to 226 Ra, 232 Th and 40 K may be external and defined in terms of external hazard index. To evaluate the external gamma (γ) radiation dose from ornamental stones, the following model was used as criterion. This model uses the external hazard index H ex defined as (Hayumbu et al., 1995).
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2021-11-13 What is a quarry? 16 What activities in a quarry are covered? 17 Demarcation 17 Excavations associated with construction work 17 Reclamation sites etc 17 Tips 18 Rail lines 18 Temporary closure 18 PART II Health and safety management 19 Regulation 5 Duties of the person entitled to work the quarry 19
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2018-1-19 radiation exposure quantity that is useful in some instances, but is not used for the Dose Ranges Chart – the effective dose. Much research has also been devoted to determining radiation sensitivities for risk of cancer in the different tissues and organs of the human body, and this information has been used to produce a list of Tissue Weighting
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