A LITERATURE SURVEY OF MINERAL-SPECIFIC SORPTION DATA ON RADIONUCLIDES WITH RELEVANCE TO THE DISPOSAL OF RADIOACTIVE-WASTE

A comparative review of mineral-specific: radionuclide sorption databa ses created for performance assessment and reported in both the open l iterature and ''grey literature'' (e.g. technical reports) has in part shown poor quality of documentation describing the database selection procedures. Inadequate information is available on the chemical speci es of the radionuclide under consideration and the laboratory conditio ns for determining Kd-values. Sorption data derived from literature ar e neither comparable nor generally applicable due to the wide range in the composition of the aqueous and the solid phases applied in migrat ion experiments. Subsequently, standardized characterization and deter mination procedures are needed. To improve the reliability of a mathem atical model for the prediction of radionuclide sorption on cementitio us and ash-type binder materials, determination of mineral-specific so rption coefficients is indispensable.