5. Conclusion
On the basis of theoretical and experimental studies a method of assessment and prognosis of the radionuclides migration soils has been created.
Experimental methods for the determination of transfer characteristics and their assessment, and also the methods for prediction of radionuclide migration in frozen grounds should provide a clear distinction between driving forces and fluxes of the convection and diffusion transfer.
The proposed mathematical models are phenomenological and the transfer coefficients involved in these models are recommended to be determined experimentally.
The methods were developed for investigation of diffusion and convection transfer characteristics of radionuclides in thawing and frozen grounds with the allowance for the sorption by solid phase of the soils. On the basis of the experimental data obtained the information constraints for the mathematical models of the radionuclides migration in soils have been set. On the basis of researches in the field, lab test and mathematical modelling the impact of physical-chemical factors and the soil component composition changes upon the radionuclides Cs137, Sr90 migration and sorption in natural dispersed systems (peat, sand, bentonite, kaolin, sapropel has been investigated.
The impact of electrolytes, including compounds of Cs and Sr stable isotopes upon the radionuclides behaviour in peat soils has been made known, allowing controlling their mobility.
The forecast assessments of radionuclides migration in the peat soil (the peat deposit Pogonyanskoye, the Polessye radiation-ecology reserve) under the natural and anthropogenic factors impact had been carried out.
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Brovka, G., Dedulya, I., Rovdan, E. (2005). Behaviour of the Radionuclides in Peat Soils. In: Bréchignac, F., Desmet, G. (eds) Equidosimetry — Ecological Standardization and Equidosimetry for Radioecology and Environmental Ecology. NATO Security through Science Series. Springer, Dordrecht. https://doi.org/10.1007/1-4020-3650-7_17
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