The volatilization technology,which is used for pulverizing uranium oxide ceramic pellets,decladding,and removal of most of volatile and semi-volatile fission elements from spend fuel,has been developing as main treatment process for ADS nuclear fuel cycle.In the oxidation/reduction steps(400℃to 600℃),most of the volatile nuclides such as Kr,Xe,C-14,H-3,can be removed.However,the higher temperature is needed to release semi-volatile fission products.