Research for Spent Fuel Pool Self-safe Cooling Technology after Serious Accident

In view of the loss of internal and external power supplies after a serious accident in a nuclear power plant, a scheme for long-term self-safe cooling of the spent fuel pool is proposed by extracting the waste heat of the spent fuel pool for power generation. Based on the thermal process analysis, working medium selection, thermal analysis of key equipment, and system design research based on the waste heat of the spent fuel pool, the feasibility of using the waste heat of the spent fuel pool to achieve long-term self-safe cooling of the spent fuel pool after a serious accident is discussed. The research shows that according to the working environment and the system output power after the serious accident of the nuclear power plant, the waste heat self-generating system of the spent fuel pool can be constructed by the Shangyuan cycle or the Guohai cycle. For both in-service reactor types and new reactor types, the system can ensure the continuous removal of waste heat from the spent fuel pool, meeting the requirement that the temperature of the spent fuel pool is lower than 80°C, thereby realizing self-safe cooling of the spent fuel pool.