Uranium sorption and solubility under conditions relevant for the radioactive waste repository in Morsleben / Germany

Uranium is of great importance for the Morsleben radioactive waste disposal site. Its retention by both backfilling materials and the overlying rock was determined in batch sorption experiments over a period of 400 days. There, the solution simulated the brines typical for this site. The observed retention at the backfilling and overlying rock materials was in the regions of 95.8 to 100% and 92.7 to 98.1%, respectively. The solubility of solid U₃O₈ in these brines was determined to be between 5*10^-9 and 9*10^-6 mol/L uranium.

The project was supported by the BfS under the contract No.: 9M 212230-62