Abstract: The design of nuclear emergency decision support system based on operational intervention level(OIL)is proposed in this paper according to the concept, application and latest development of operational intervention level. It mainly includes visual management of radiation monitoring data with operational intervention level as multi-level threshold, protection action decision-making based on operational intervention level, and monitoring plan formulation. In order to realize the above functions, the system should also construct operation intervention level database, radioactive background database and other basic resource databases.

Key words: operational intervention levels, nuclear emergency response, decision support system