The disposal of high-level radioactive waste(HLW)is a complex and technological problem in the processing of radioactive wastes around the world.Synroc,which has been considered as the waste form of second generation,is suggested as the potential immobilization medium for HLW as it exhibits high chemical,thermal and radiation stability.Nuclide atoms can be fixed in the crystal lattice of synroc structure and the eventual security can be guaranteed.One Synroc mineralogy,zirconolite,was selected as the waste form for longlived actinide nuclides in this research.