Natural background radiation in Canada

Grasty, R L; Carson, J M; Charbonneau, B W; Holman, PB

doi:10.4095/119745

Cited by 24 publications

(17 citation statements)

References 12 publications

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“…This depends on several factors including type and energy of radiation, total doses, size of irradiation section, the radiosensitivity of the individual and age (Rumyantsev, 1967). Several methods are proposed to estimate and discuss the environmental impacts of radiation (IAEA, 1979;ICRU, 1980;Grasety et al, 1984;Yu et al, 1992;Tufail et al, 1992;UNSCEAR, 2000;Said et al, 2004).…”

Section: Environmental Impacts Of the Radionuclidesmentioning

confidence: 98%

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Distribution and environmental impacts of some radionuclides in sedimentary rocks at Wadi Naseib area, southwest Sinai, Egypt

Galy

Mezayn

Said

et al. 2008

Journal of Environmental Radioactivity

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Section: Environmental Impacts Of the Radionuclidesmentioning

confidence: 98%

“…The exposure and dose rates related to the measured radionuclides in the studied sediments are discussed through determination of their values and in terms of radium equivalent activity. The exposure rate (mR/h) is determined using the following equation (Grasety et al, 1984):…”

Section: Exposure and Dose Ratesmentioning

confidence: 99%

Distribution and environmental impacts of some radionuclides in sedimentary rocks at Wadi Naseib area, southwest Sinai, Egypt

Galy

Mezayn

Said

et al. 2008

Journal of Environmental Radioactivity

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“…Since the time radioactivity has been discovered, more efforts have been put into the study of the environmental natural radiation [1]. Calculations of equivalent doses from natural environments have recently been possible through ground and airborne gamma-ray surveys [2][3][4]. Air-borne gamma ray spectrometry measures natural emission of gamma radiation from the surface of the earth.…”

Section: Introductionmentioning

confidence: 99%

High resolution airborne radiometric and magnetic studies of ilesha and its environs, southwestern Nigeria

Okeyode

Olurin

Ganiyu³

et al. 2019

Materials and Geoenvironment

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The study of the nature of distribution of natural radioelements in Ilesha and its environs with its geological structure has been studied using aeroradiometric data. Aeromagnetic data have also been subjected to three automated gradient techniques to delineate the sub-surface structure of the study area. From the study, it can be found that maximum values of “eU” (ppm) and “eTh” (ppm) fall within the branded gneiss, whereas the maximum value of K (%) falls within porphyritic granite regions. eTh had the highest radioactive content. The environmental dose rate of Ilesha was between 0.1817 and 3.9296 msv/yr. Although there were extreme values, but the mean dose rate was 0.522 ± 0.310 msv/yr (within acceptable safe limit of 1.0 msv/yr). eU/K, eU/eTh and eTh/K ratios were analysed for enrichment or depletion of radioisotopes. eU/eTh >1 showed uranium depletion, while eTh >2 showed eTh enrichment. The magnetic intensity values ranged from -79.41 to 140.93 nT. The horizontal gradient method (HGM) and analytic signal amplitude (ASA) revealed that depth to magnetic sources ranged from 0.478 to 4.112 km and 0.348 to 2.551 km, respectively, whereas local wavenumber (LWN) depth ranged from 0.478 to 5.48 km, which overestimated those compared using HGM and ASA functions. The apparent susceptibility ranged from -0.00325 to 0.00323 SI, showing that ferromagnetic and diamagnetic mineral ranges control apparent susceptibility in Ilesha.

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“…These were at depth levels of 0 cm to 6 cm, as adopted by Ajayi [26], Macleod et al [20] and Ibeanu et al [37] to determine the equivalent dose in human body and in building construction materials to the natural gamma-emitting radionuclides ( 238 U, 232 Th and 40 K) [58]. Gross gamma and alpha radiations counts data obtained in counts per second (c/s) were converted to exposure in reagent/h and these were exposure rates again converted to absorbed dose rate in rad/h using the relation between absorbed dose rates as given by Grasty et al [59]. A PUG-7 radiation meter combined with a T/A probe was used to measure the radiation levels in the soil samples.…”

Section: Methodsmentioning

confidence: 99%

Abandoned Mine, Potential Home for the People: A Case Study of Jos Plateau Tin-Mining Region

Wapwera¹,

Ayanbimpe²,

Odita³

2015

JCEA

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This paper seeks to examine the JPTMR (Jos Plateau Tin-Mining Region) as an abandoned mine that provides land for housing by examining the impact of the tin-mining activities due to the presence of heavy metals and radioactive substances and analyzing the level and availability of these substances and their effects on human health and the built environment within JPTMR. Utilizing secondary data, which map out 10 different locations in the region, the paper highlights the level of radioactive substances (X-ray, beta-ray and gamma-ray) and presence of heavy metals in the environment. The results show that there are traces of X-ray, beta-ray and gamma-ray as well as the heavy metals such as Pb, As, Cu, Cr and Ni which exceeded the international standards. This is particularly significant as people use the contaminated soils as building materials for their homes as well as for farming and food production. The inhabitants of the area are often without any knowledge about the perils of the contaminated soils, water as well as air which is serious long-term human catastrophe. Drawing from international experience, the paper argues that it is possible to develop housing in former tin-mining areas but requires careful remediation and engagement by the public and private sector.

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Natural background radiation in Canada

Cited by 24 publications

References 12 publications

Distribution and environmental impacts of some radionuclides in sedimentary rocks at Wadi Naseib area, southwest Sinai, Egypt

Distribution and environmental impacts of some radionuclides in sedimentary rocks at Wadi Naseib area, southwest Sinai, Egypt

High resolution airborne radiometric and magnetic studies of ilesha and its environs, southwestern Nigeria

Abandoned Mine, Potential Home for the People: A Case Study of Jos Plateau Tin-Mining Region

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