Evaluation of the antimigration properties of materials for buffer filling of a near-surface radioactive waste repository

Antimigration properties of materials considered as components of the buffer filling of a near-surface radioactive waste repository were studied. The experiments demonstrated high ability of sand (containing mainly quartz) and clinoptilolite, which are the major components of the buffer filling, to absorb Cs and Sr. Additions of hematite and magnesium oxide enhance the ability of the buffer filling to absorb Co, U, and Pu.