SearchPublisher and Institutes
You are here: Home :: Area NEM :: Chemistry :: Physical chemistry
J. Bruno, E. Cera, M. Grivé, Joan de Pablo, P. Sellin, L. Duro
Determination and uncertainties of radioelement solubility limits to be used by SKB in the SR 97’ performance assessment exercise
The Swedish Fuel and Waste Management Co, SKB, is at present preparing a Performance Assessment (PA) exercise of its HLNW repository concept. The determination of solubility limits of the main radioelements contained in the spent nuclear fuel is a necessary work to understand their potential migration in both the near and far fields.
The calculated solubilities are compared to experimental data from relevant spent nuclear fuel dissolution tests and field observations from natural systems, particularly Natural Analogue study sites. This work discusses the main uncertainties associated to the calculated solubilities, particularly those related to the variability of groundwater composition, redox conditions and temperature of the system.
The results of the sensivity analysis indicate that although the solubility of some radioelements, such as Th, is not dramatically affected by the uncertainty in the determination of the physico-chemical parameters mentioned above, most of the elements are strongly influenced by this variability, specially Am, U, Np, Pu and Tc.
Radiochimica Acta, Oldenbourg Wissenschaftsverlag
Print ISSN: 0033-8230
Volume: 88, 09/2000
Pages: 823