Using the RESRAD Code to Assess Human Exposure Risk to226Ra,232Th, and40K in Soil

Ziajahromi, Shima; Khanizadeh, Meysam; Nejadkoorki, Farhad

doi:10.1080/10807039.2014.909194

Cited by 27 publications

(8 citation statements)

References 30 publications

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“…The cancer risk for inhalation of radon and its progeny at t = 1 year (water-independent pathway) was calculated by RESRAD-ONSITE. It should be noted that RESRAD evaluates the risk of radon and thoron as a function of the concentration of radium and thorium [37]. Given the high concentrations of 232 Th in the soil samples from the current study area, the contribution of thoron ( 220 Rn) to cancer risk is high.…”

Section: Environmental Riskmentioning

confidence: 97%

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Risk Assessment of Exposure to Natural Radiation in Soil Using RESRAD-ONSITE and RESRAD-BIOTA in the Cobalt-Nickel Bearing Areas of Lomié in Eastern Cameroon

et al. 2022

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Nkamouna-Kongo is a cobalt–nickel deposit located in Lomié, Eastern Cameroon. Mining creates radiation exposure pathways that must be considered in risk management scenarios. RESRAD-ONSITE and RESRAD-BIOTA, developed by the US DOE, assess contaminated sites by deriving cleanup criteria and estimating the radiation dose and risk associated with residual radioactive materials using site-specific parameters. This paper evaluated the radiation dose in biota and the health risk from exposure to naturally occurring radionuclides. The activity of 226Ra, 232Th, and 40K was determined by γ-spectrometry. The internal doses were 2.13 × 10−07, 1.42 × 10−06, and 8.38 × 10−05 Gy d−1 for animals and 2.38 × 10−07, 2.04 × 10−06, and 9.07 × 10−05 Gy d−1 for plants. The maximum total dose of 0.7234 mSv yr−1 was obtained at t = 1 year. The external dose contribution obtained at t = 1 year for all nuclides summed and all component pathways was 0.4 mSv yr−1, above the background radiation dose limit of 2.5 × 10−01 mSv yr−1. A maximum cancer risk of 1.36 × 10−03 was observed at t = 1 year. It was also shown in the RESRAD calculations that the total cancer morbidity risks from plant ingestion, radon (independent of water), and external gamma exposure pathways were greater than those from other exposure pathways. The high risk calculated for 226Ra relative to 232Th and 40K makes it the primary human health concern in the study area. The use of a 1 m cover thickness would remediate the contaminated site to a dose on the order of 10−5 mSv yr−1 for a period of 0 to 100 years. The values of these doses are below the US DOE recommended limits.

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Section: Environmental Riskmentioning

confidence: 97%

“…It is important to note that RESRAD cannot be an appropriate model for radon risk assessment because there is no direct input for radon activity concentration in RESRAD [37].…”

Section: Environmental Riskmentioning

confidence: 99%

Risk Assessment of Exposure to Natural Radiation in Soil Using RESRAD-ONSITE and RESRAD-BIOTA in the Cobalt-Nickel Bearing Areas of Lomié in Eastern Cameroon

et al. 2022

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“…Natural radioactivity is widely spread in the earth's environment and depends primarily on the geological and geographical conditions, and appears at different levels in the soils of each region in the world [6]. According to [7] radionuclides of Uranium and Thorium and their decay products are the most important NORMs in radiological studies as they contribute in no small measure to human exposure in the environment.…”

Section: Journal Of Environment Pollution and Human Healthmentioning

confidence: 99%

Radiological Assessment of Artisanal Gold Mining Sites in Luku, Niger State, Nigeria

Sabo¹,

Sadiq²,

Gamba³

2018

JEPHH

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Artisanal small scale mining of solid minerals has the potential of causing many environmental and health problems. Thus, assessment of ionizing radiation in vulnerable areas is very important from the environmental health point of view. This study was aimed at determining the level of radiation in the vicinity of artisanal gold mining sites in Luku, Niger State, Nigeria. Measurements were made at four different Stations: A, B, C and D using Radiation Inspector Alert meter (EXP + model). The investigation revealed that mean values of 1.66mSv/yr, 1.55, mSv/yr, 1.48mSv/yr and 2.12mSv/yr were recorded for stations A, B, C and D respectively. The radiation levels recorded from all the four sampling stations have exceeded the threshold limit set by the International Commission for Radiological Protection (ICRP) of 1mSv/yr for public exposure. Thus the community is at risk of exposure to high dose of radiation as a result of the artisanal gold mining activities. The adoption of rigorous regulations and implementation of mining-policies such as the Minerals and Mining Act of 2007 which prohibited the illegal exploration and or exploitation of Minerals will play the right role in reducing radiation emissions and their consequential harm to the community and the state economy.

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“…Rapid industrialization and urbanization have brought increasing pressure on the environment. The United States proposed the concept of water-related environmental risk assessment in the 1970s [2,3]. Water-related environmental risk assessment is the process of determining all potential impacts on the water environment and estimating the probability of the occurrence of waterrelated environmental events following the principles of locality, systemicity, dynamics, and consistency [4,5].…”

Section: Introductionmentioning

confidence: 99%

An Integrated Assessment and Factor Analysis of Water Related Environmental Risk to Cities in the Yangtze River Economic Belt

Cui

et al. 2021

Water

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With rapid development of the economy and urbanization, water-related environmental risk in urban areas has increased and hindered social-economic development and ecological protection. The assessment of water-related environmental risk is of vital importance to the sustainable development of the Yangtze River Economic Belt (YREB). This study constructed a comprehensive assessment index system for water-related environmental risks from three perspectives: the hazards posed by risk sources, the effectiveness of the control mechanisms, and the vulnerability of the risk receptors. Employing the entropy method, the water-related environmental risks of cities in the YREB from 2000 to 2015 were comprehensively evaluated, and the obstacle degree model was used to analyze the associated influencing factors of the water-related environmental risk. The results showed that the overall level of water-related environmental risk of the YREB presented a significant spatial gradient characterized by “downstream risk > midstream risk > upstream risk”. The areas with higher risks were mainly distributed in the Yangtze River Delta in the downstream area, and Wuhan and Changsha in the midstream area, where their risk receptors were highly vulnerable, and efforts should be made to improve the resilience of these areas. In terms of temporal change, the average value of the comprehensive water-related environmental risk of the YREB dropped from 0.493 in 2005 to 0.392 in 2015, with a reduction rate ranging from about 16.55 to 25.76%. The number of cities with medium-high to high risk had gradually decreased, and the number of cities with medium, medium-low, and low risk continued to increase. The water-related environmental risk of the YREB as a whole is in the transition stage from high risk level to medium and low risk level. Specifically, the hazards posed by risk sources had increased continually, and especially increased significantly in the midstream of the YREB; the effectiveness of risk control mechanisms had increased throughout the region, with downstream cities mainly having a high level of effectiveness; the areas with high vulnerability of the risk receptors were mainly concentrated in the Yangtze River Delta and showed an upward trend. Overall, the main source of water-related environmental risks and differences among the upstream, midstream and downstream cities had shifted from the hazards posed by risk sources to the effectiveness of risk control mechanisms and the vulnerability of the risk receptor. The main factors affecting the water-related environmental risk in the order of average obstacle degree were per capita GDP (34.43%), the number of beds per thousand people (18.70%) and the industrial structure height (15.55%). Therefore, promoting the adjustment of industrial structure, improving economic efficiency, developing the regional social economy, and improving and perfecting the construction of environmental protection infrastructure are effective ways to realize the mitigation and resolution of water-related environmental risks.

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Using the RESRAD Code to Assess Human Exposure Risk to²²⁶Ra,²³²Th, and⁴⁰K in Soil

Cited by 27 publications

References 30 publications

Risk Assessment of Exposure to Natural Radiation in Soil Using RESRAD-ONSITE and RESRAD-BIOTA in the Cobalt-Nickel Bearing Areas of Lomié in Eastern Cameroon

Risk Assessment of Exposure to Natural Radiation in Soil Using RESRAD-ONSITE and RESRAD-BIOTA in the Cobalt-Nickel Bearing Areas of Lomié in Eastern Cameroon

Radiological Assessment of Artisanal Gold Mining Sites in Luku, Niger State, Nigeria

An Integrated Assessment and Factor Analysis of Water Related Environmental Risk to Cities in the Yangtze River Economic Belt

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