We analyzed the safety features and potential risks of the uranium conversion plant.The analytical method of the UF
6 or HF leakage accident was presented.We gave the justification of working out the EAL(Emergency Action Level) of the uranium plant on the basis of investigations of the practice taken by International Atomic Energy Agency(IAEA) and US Department of Energy(DOE).The rules of assessing emergency states and the risk features were also considered in the research.