GROUNDWATER MONITORING AND MATHEMAICAL MODELING OF RADIOACTIVE CONTAMINATION OF GROUNDWATER IN CHERNOBYL EXCLUSION ZONE AND FOR THE URANIUM FACILITIES OF THE FORMER PRIDNEPROVSKY CHEMICAL PLANT (Kamyanske)

Bugai, D.O.; Dzhepo, S.P.; Skalskyy, O.S.; Kubko, Yu.I.; Saprykin, V.Yu.

doi:10.30836/igs.1025-6814.2018.4.148466

Cited by 4 publications

(4 citation statements)

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“…Currently, the tailing pond surface is a drainless catch basin of atmospheric precipitation seeping through phosphogypsum and watering RAW. The polluted water is discharged by means of filtration through the protective dam body and base in surface and underground water [17], [18].…”

Section: Figure 1 Areal Scheme Of the Dniprovske Tailing Pond Locatio...mentioning

confidence: 99%

Analyzing stability of protective structures as the elements of geotechnical tailing pond safety

Tymoshchuk,

Rudakov,

Pikarenia

et al. 2023

Min. miner. depos.

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Purpose is the assessment of soil retaining wall stability to ensure geotechnical safety during the radioactive waste tailing pond closure and further recultivation (or rehabilitation) in Kamianske town (Ukraine). Methods. Geomechanical stability of the protective structure has been assessed relying upon the analysis of geological-hydrogeological, engineering-geological, and geotechnical conditions of the certain tailing pond area using a deformation elastic-plastic model of a medium implemented on the basis of finite-element method. For the purpose, the dam slopes have been detalized taking into consideration their geometry as well as changes in vertical section of rock material characteristics in accordance with the earlier geophysical studies; exploration drilling; and engineering-geological surveys. Findings. Stability coefficients of protective tailing pond dam have been identified within the typical areas of a hydraulic structure; it provides high reliability and representativeness of the whole structure health in time as well as under various conditions of the industrial waste water saturation. It has been defined that the stability coefficients varies from ks = 1.372 to 4.758. Comparison of the indicators between 2022 and 2016 demonstrates a tendency of the slope stability coefficient decrease due to water saturation and groundwater level rise. Nevertheless, design characteristics of the structure make it possible to ensure satisfactory a stability coefficient along the whole dam length being 1.13 times higher than the standard one (i.e. ks = 1.250). Originality. The dependence of the tailing pond protective dam stability upon a water supply degree at the forecasted groundwater level rise at the expense of atmospheric and melt water ingress to the tailing pond has been defined. The danger of complete radioactive waste water saturation is a significant reduction in the stability coefficient of the protective structure, which can be supported by predictive modelling data. If strength parameters of a dam material decline for the most critical area then the strength coefficient decreases starting from 1.532 in terms of the current groundwater level down to 1.372 as for the forecasted dam water supply. The figure is more than 10% of its initial stability. Practical implications. The obtained results substantiate the necessity; moreover, they are of practical value while improving hydrological, hydrogeological, and geotechnical monitoring of the analyzed tailing pond to ensure its radiation safety under different conditions of further behaviour during closure, recultivation, or rehabilitation.

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Section: Figure 1 Areal Scheme Of the Dniprovske Tailing Pond Locatio...mentioning

confidence: 99%

Analyzing stability of protective structures as the elements of geotechnical tailing pond safety

Tymoshchuk,

Rudakov,

Pikarenia

et al. 2023

Min. miner. depos.

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“…[3,4]. Раніше аналіз вмісту радіонуклідів уранового ряду, а також характеристик вмісту хімічними елементами підземних вод на майданчику колишнього ВО «ПХЗ» виконано у роботах [5,6,7,8].…”

Section: рис 1 картосхема проммайданчика колишнього во «пхз» (м кам'я...unclassified

“…Підземні води верхнього алювіального водоносного горизонту у межах колишнього промислового майданчика рухаються у напрямку зони нижньої тераси трансаквального ландшафту до їх розвантаження у заплаві р. Коноплянка, яка протікає на відстані 800-1000 м від хвостосховищ. Водоносний горизонт у межах тераси і схилів морфологічної будови правобережжя р. Дніпро характеризується відносно високими фільтраційними властивостями, що створює умови для відносно швидкого поширення ореолу забруднюючих речовин у напрямку р. Коноплянка (6-10 м/рік) [5,6].…”

Section: рис 1 картосхема проммайданчика колишнього во «пхз» (м кам'я...unclassified

Assessment of Temporal and Space-Time Changes of Groundwater Chemical Composition at the “Рridniproivsky Chemical Plant” Uranium Production Legacy Site

Lavrova¹,

Korychenskyi²,

Voitsekhovych³

2022

HHH

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This study provides an analysis of data from long-term (2005-2021) observations of the chemical composition of groundwater in the impact zone of the former uranium ore processing enterprise (Production Union Prydniprovskyi Chemical Plant (PU “PChP”) in the city of Kamianske, in particular, areas of near-surface tailings of uranium ore processed residues (“Zapadnoe”, “Central Yar” and others). All tailings on the site of the former PU “PChP” were built without installation of anti-permeable barriers, and therefore under the influence of atmospheric precipitation, the water, formed in the tailings body, highly contaminated of uranium series radionuclides and residues of chemical reagents, can penetrate to the groundwater aquifers, with which they spread beyond the limits of their technological localization in tailings. In addition, the entire territory of the former industrial site of mining and chemical production “PChP” is a complex of former enterprises, septic tanks, production waste holding sites, warehouses of chemical reagents and residues of former production, which are also sources of man-made pollution of the territory and influence on chronic pollution of groundwater. Therefore, environmental monitoring programs in the impact zone of tailings impoundments included not only monitoring of indicators of the content of uranium series radionuclides in elements of the natural environment, but also studying of the chemical composition of waters. The analysis of observation data during the period from 2005 to 2021 was carried out in order to assess the extent of the spread of polluted waters beyond the limits of the location of the tailings ponds, to identify major macroions in the composition of groundwater as indicators for assessing the spread of the contamination plume beyond the boundaries of the tailings ponds, as well as to identify patterns of formation the groundwater quality within the site under the influence of man-made and natural factors. It is shown that the mineralization of groundwater, as well as its chemical composition, significantly changed as the sampling site moved away from the tailings. Changes in the chemical composition of water and the dominant content of the major macroions at different distances from the tailing’s ponds made it possible to determine the difference in the characteristics of the influence of infiltration waters from the source of the tailing’s ponds and scattered sources of pollution within the boundaries of the PChP site along the groundwater flow line. The main factors of uncertainty in the estimations of the formation of groundwater chemistry in the zone of the industrial complex are shown, which must be taken into account for the development of the network of monitoring observations.

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“…Several modern studies are devoted to the problem of studying and assessing the content of radionuclides in soils, bottom sediments, air, and water bodies [3][4][5][6][7][8][9][10][11]. In this regard, the bottom sediments of water bodies deserve considerable attention, as they can accumulate pollutants (products of destruction of shores, soils, etc.…”

Section: Introductionmentioning

confidence: 99%

Radiation Mapping of the Borzhava River Areas, Tisza Basin: Peculiarities of Radionuclide Distribution and Organisational and Managerial Support of Mountainous Territories

Symkanych,

Svatiuk,

Maslyuk

et al. 2024

Problems of Atomic Science and Technology

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The article presents the results of radioecological studies of the Borzhava River, which is an integral part of a comprehensive study of the Tisza River water systems and their impact on the hydrological balance of the region. To study the processes of migration, accumulation, and prediction of the behavior of gamma-active nuclides (natural 40K, 238U, and 232Th series and man-made 137Cs), the spatial and seasonal distribution of these nuclides in the river bottom sediments was mapped. Seasonal fluctuations in the concentration of 137Cs, 40K, 238U, and 232Th activity in spring, autumn, and summer were determined. A multivariate statistical analysis was carried out, establishing the degree of correlation between the sampling points regarding the content of gamma-active nuclides. The research and generalization of the regularities of distribution, migration, and accumulation of gamma-active nuclides can be used to develop regulatory and legal documentation.

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GROUNDWATER MONITORING AND MATHEMAICAL MODELING OF RADIOACTIVE CONTAMINATION OF GROUNDWATER IN CHERNOBYL EXCLUSION ZONE AND FOR THE URANIUM FACILITIES OF THE FORMER PRIDNEPROVSKY CHEMICAL PLANT (Kamyanske)

Cited by 4 publications

References 1 publication

Analyzing stability of protective structures as the elements of geotechnical tailing pond safety

Analyzing stability of protective structures as the elements of geotechnical tailing pond safety

Assessment of Temporal and Space-Time Changes of Groundwater Chemical Composition at the “Рridniproivsky Chemical Plant” Uranium Production Legacy Site

Radiation Mapping of the Borzhava River Areas, Tisza Basin: Peculiarities of Radionuclide Distribution and Organisational and Managerial Support of Mountainous Territories

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