Characterization of solidified radioactive waste and container due to the incorporation of high density polyethylene granules and powder in mortar matrices

摘要

Powder and granules of the high density polyethylene (PEHD) were used to prepare mortar based matrices for immobilization of radioactive waste materials containing ~(137)Cs, well as containers for solidified radioactive waste from. Seven types of matrices, differ due to the percentage of granules and filler material added, were investigated. PEHD powder and granules were added to mortat matrix preparations with the objective of improving physico-chemical characteristics of the radwaste-mortar matrix mixtures, in particular the leach-rate of the immobilized radionuclide, as well as mechanical characteristics either of mortar matrix and container. In this paper, paper, only mechanical strength aspect of the ivestigated mortar and concrete container formulations, is presented. The equivalent diameter of the PEHD granules used was 2.0 mm. PEHD granules were used to replace 100 volume perent of stone granules, sifted size of 2.0 mm, normally used in the matrix preparation, in order to decrease the porosity and density of the morthar matrix and to avoid segregation of the stone particles at the bottom of the immobilized radioactive waste cylindrical from.