FLUORITE TYPE PHASE IN NUCLEAR WASTE CERAMICS WITH HIGH ZIRCONIA AND ALUMINA CONTENTS

The present study aims at evaluating the solid solubility of the actinide elements, the rare earth elements, the alkaline earth metals, etc. in the fluorite phase under low oxygen pressures. This knowledge is not only useful in discussing the reaction conditions for incorporation of these elements in HLW but also a basis for identification of phases, structures and phase behavior in the solidification process of the HLW.