Radionuclide migration at experimental polygon at Red Forest waste site in Chernobyl zone. Part 2: Hydrogeological characterization and groundwater transport modeling

Combining geostatistics and physically-based simulations to characterize contaminated soils

“…Physically-based numerical simulations of flow and solute transport are another widely used approach to assess contaminated soils and groundwater (e.g., [5] and [6]). Such simulations take into account complex processes governing contamination spread but they require a relevant definition of initial and boundary conditions, as well as internal hydraulic properties.…”

Innovative Technology of Horizontal Protective Shield Arrangement Using Injection

“…The activity ratios of the 99Tc/137Cs ratios in the soils were calculated as approximately 3.7 × 10 −5 to 1.3 × 10 −4 [2,3]. Along with a high content of 90Sr (of an order of n × 1000 -n × 10,000 Bq/L), the groundwater in the Red Forest radioactive waste dump site in the Chernobyl exclusion zone showed elevated concentrations of calcium (Ca) and kalium (K), and had more acidic pH values compared to the "background" aquifer conditions [4,5]. The radiocarbon (14C) values of humic and fulvic acids ranged from −68‰ to +75‰, and were ∼400‰ lower than those of non-contaminated environments [6].…”

UAV-based high-resolution remote sensing and machine learning for risk management in hazard and disaster areas

“…Undoubtedly, radioactive isotopes (mainly Cs-137 and Sr-90) still exist in the soil of contaminated areas due to their half-lives of approximately 30 years (Flynn et al, 1965). Moreover, the transportation of radionuclides in the groundwater was modelled by Bugai et al (2012), and the biogenic migration of radionuclides from subsurface storage into plants was described by Kashparov et al (2012). The absorption of radionuclides differs between tree species (Tikhomirov and Shcheglov, 1994), and the absorbed irradiation dose correlates with the tree mortality rate (Arkhipov et al, 1994).…”

“…Because the halflives of Cs-137 and Sr-90 are approximately 30 years (Flynn et al, 1965), these radioactive isotopes still exist in the soil of contaminated areas and have been absorbed by the vegetation. Bugai et al (2012) characterized the hydro-geological situation in the ChEZ and modelled groundwater transport to describe the migration of radionuclides. Furthermore, Kashparov et al (2012) presented studies describing the biogenic migration of radionuclides from subsurface storage into plants.…”

“…The main results describe the biogenic migration of radionuclides from subsurface storages into plants. Bugai et al (2012) focused on the hydrogeological characterization and groundwater transport modelling to describe the migration of radionuclides over a 16-year period (1986)(1987)(1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002). Besides these research studies, the European Union financed a project called "Support to radioactive waste management in Ukraine" (EU, 2014(EU, -2017.…”