The current accident regulations of the second-generation reactor nuclear power plant are not enough to handle the superposition accident(SBO/TLFW)of the Station-Black-Out(SBO)and the Total Loss of Feed-Water(TLFW)accidents.Passive pulse cooling is a new approach to delay the accident process by fully utilizing the existing equipment and system in the secondary circuit of the second-generation reactor nuclear power plant.In order to analyze the mitigating effect of the passive pulse cooling system on SBO/TLFW,based on the best-estimate system code RELAP5,models of the primary system,the secondary circuit and the passive pulse cooling system of the CPR1000 unit were established,and accident scenarios were analyzed for the SBO/TLFW accident.The accident processes with and without the passive pulse cooling system were compared.The calculation results show that if the passive pulse cooling system is started within eight minutes following reactor scram,the core uncovering can be delayed by 12 hours,merely relying on the water stored in the deaerator,which can significantly delay the SBO/TLFW accident process in PWR.
Passive pulse coolingStation Black-Out(SBO)Total Loss of Feed-Water(TLFW)
维普
万方数据
