Zirconolite-rich and pyrochlore-rich synrocs were fabricated and studied. The designed formulae for solidification of actinides were given, and the properties of the waste form, like physical properties, durability properties and irradiation properties, were evaluated. The phase assemblages, elemental distribution and phase chemical composition were analyzed by using X-ray diffractometer (XRD), scanning electron microscopy with energy dispersive spectrometer (SEM/EDS) and transmission electron microscopy with energy dispersive spectrometer (TEM/EDS). The results showed that zirconolite-rich and pyrochlore-rich synrocs were suitable waste form for solidification of actinide wastes.

Key words: PYROCHLORE, X-RAY DIFFRACTION ANALYSIS, SCANNING ELECTRON MICROSCOPES, RADIOACTIVE WASTE