Gamma dose rate distribution in the Unegt subbasin, a uranium deposit area in Dornogobi Province, southeastern Mongolia

Omori, Yasutaka; Gun-Aajav, Manlaijav; Enkhgerel, Nyamdavaa; Munkherdene, Ganbat; Oyunbolor, Galnemekh; Shajbalidir, Amarbileg; Palam, Enkhtuya; Yamada, Chieri

doi:10.1007/s11356-019-06420-3

Cited by 13 publications

(4 citation statements)

References 36 publications

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“…Based on the results of laboratory studies, we recommend the acidification of uranium-bearing rocks using solutions with concentrations of 10-15 g/l, and the leaching of uranium using solutions with acid concentrations of 8-12 g/l (Khomenko and Maltsev, 2013). To intensify the process, it is necessary to increase the time of interaction between leaching fluids and rocks, which can be achieved by increasing the distance between the wells to 25-50 m in case of sufficient permeability of ore bodies and enclosing rocks, which corresponds with (Omori, et. al., 2019).…”

Section: Laboratory Studiesmentioning

confidence: 99%

Managing the Horizon-Oriented in-Situ Leaching for the Uranium Deposits of Mongolia

Khomenko,

Rudakov,

Lkhagva

et al. 2023

MGPB

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This paper summarizes the results of evaluating uranium in-situ leaching (ISL) parameters for hydrogenous deposits in eastern Mongolia. This method, also known as in-situ recovery (ISR) or solution mining was proposed for mining used to extract uranium from underground deposits without physically removing the ore. The studies included drilling, geophysical surveying, evaluations of rock properties and chemical composition of rocks and groundwater, as well as modelling coupled flow and transport for the “Ul’zit” deposit as a case study. The proposed horizon-oriented approach to process separate ore bodies at different depths allows for the mining process to be adapted to layered heterogeneity and allows successive leaching by wells of varying diameter and special design. This approach may reduce drilling costs and shorten the time for mining uranium deposits in Mongolia by 2 times on average. It was proven that this method is an environmentally friendly and cost-effective alternative to traditional underground or open-pit mining for uranium ore bodies. The economic evaluation confirms the effectiveness of the proposed solutions.

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Section: Laboratory Studiesmentioning

confidence: 99%

Managing the Horizon-Oriented in-Situ Leaching for the Uranium Deposits of Mongolia

Khomenko,

Rudakov,

Lkhagva

et al. 2023

MGPB

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“…Many researchers have utilized the car-borne technique since the F1-NPP accident [16,[18][19][20][21][22] to evaluate radiation dose widely and quickly. In the present study, each car-borne survey was carried out over asphalt pavements using a 3-in × 3-in NaI(Tl) scintillation spectrometer with a global positioning system (EMF-211, EMF Japan Co., Hyogo, Japan) and a multi-channel analyzer (GAMMA-RAD5, AMPTEK, Bedford, MA, USA).…”

Section: Car-borne Surveymentioning

confidence: 99%

Changes in environmental radiation levels in Katsushika Ward, Tokyo after the Fukushima Daiichi Nuclear Power Plant accident

Tsukada

Inoue

Ichihara

et al. 2021

J Radioanal Nucl Chem

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Katsushika Ward, located in northeastern Tokyo, had the highest deposition in Tokyo of artificial radionuclides after the Fukushima Daiichi Nuclear Power Plant accident. A car-borne survey for measuring absorbed dose rate in air was carried out in the ward in each of the years 2015-2020. The average dose rates measured in 2015-2018 decreased every year but percentage reductions were smaller after 2018 due to the decrease in 134 Cs amount; this radionuclide decays with a half-life of 2.065 years. Its ecological half-life was estimated to be 1.6 y and that value was shorter than the physical decay life (3.2 y).

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“…Japanese researchers and officers from the Mongolian Nuclear Energy Commission implemented a car-borne terrestrial radiation measurement in July 2019 using a 3 in x 3 in cylindrical Nal (Table 1) scintillation spectrometer. 11…”

Section: Terrestrial Radiation Studymentioning

confidence: 99%

“…12,13 The radiation measurement results revealed that the radiation level around ZB's center ranged from 0.069 to 0.108 micro Sievert (μSv) per hour, or 0.6 to 0.95 milli Sievert (mSv) per year, and from 0.098 to 0.165 μSv per hour, or 0.86 to 1.44 mSv per year around the Dulaan Uul experimental mining site, which had been fenced off from the public. 11 The International Commission on Radiation Protection stated that "the dose limit for exposures of the public from practices is expressed as aggregated (prolonged and transitory) additional annual doses from all relevant practices of 1 mSv" 14 ; except for some parts around the fence surrounding the deposit, all areas showed safe levels.…”

Section: Community Reporting Meetingmentioning

confidence: 99%

A Global Collaboration for Community-Based Disaster Preparation and Health Promotion: Fukushima to Zuunbayan in Mongolia

Yamada

Tsedendamba²,

Shajbalidir

et al. 2020

Disaster med. public health prep.

Self Cite

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Excessive radiation exposure has adverse effects on health. In Fukushima, psychological issues such as anxiety are still affecting people nine years after the Fukushima nuclear power plant accident in 2011. In light of the lessons learned from Fukushima communities, a joint Japanese and Mongolian research team introduced a community program to the Zuunbayan district in Mongolia, which is located near a uranium deposit, to promote good health by strengthening radiation emergency preparedness. The program, which commenced in 2017, aimed to increase community participation, education, information dissemination, and capacity of community preparedness. After two years a monitoring study showed that, out of 227 respondents, the proportions who thought that any level of radiation was dangerous decreased from 53.3% in 2017 to 33.9% in 2019. Moreover, half of the respondents knew that there were safe and unsafe radiation levels and that their community was safe. This global collaboration demonstrated that a lesson learned from a disaster can be applied to other countries and changed people’s recognition and behavior toward good health and disaster/emergency preparedness.

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Gamma dose rate distribution in the Unegt subbasin, a uranium deposit area in Dornogobi Province, southeastern Mongolia

Cited by 13 publications

References 36 publications

Managing the Horizon-Oriented in-Situ Leaching for the Uranium Deposits of Mongolia

Managing the Horizon-Oriented in-Situ Leaching for the Uranium Deposits of Mongolia

Changes in environmental radiation levels in Katsushika Ward, Tokyo after the Fukushima Daiichi Nuclear Power Plant accident

A Global Collaboration for Community-Based Disaster Preparation and Health Promotion: Fukushima to Zuunbayan in Mongolia

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