Leaching Behavior of Cesium, Strontium, Cobalt, and Europium from Immobilized Cement Matrix

Numerous low-level and intermediate-level radioactive wastes are generated from the decommissioning processes of nuclear power plants; these immobilized to prevent release radionuclides under disposal conditions. In this study, we investigated leaching behavior Cs, Sr, Co, Eu, which common in wastes. Ordinary Portland cement (OPC) was used as an immobilization agent. During test, nuclides occurred order Eu decreased over time. The results showed that 41.4% total Cs leached 90 days, although other elements quantities less than 1.5%. CaCO3 precipitated by cementitious materials, indicating carbonation leachate. leachability indexes all cases exceeded acceptable criteria (>6). present study suggest OPC can be effectively a binding material immobilize (Cs, Eu) contained