Interaction of Actinide Matrices with Brine

Radioactive wastes with long-lived actinides derived in the nuclear fuel cycle can be disposed in very deep boreholes (depth up to 5 km) in titanate and zirconate matrices. During their interaction with a hot chloride brine very low release rate of the waste imitator (Nd) is shown. The elements in solution occur in soluble form, role of colloids is insignificant. The data allow selection of matrices for actinide waste immobilization.