Abstract
Taking the CSR1000 reactor as the research object, the SCAC-CSR1000 transient safety analysis code was made. The safety analysis of CSR1000 was done. The results showed that there is a flow reversal phenomenon in the reactor coolant pump seizure accident. When the inlet flow decreased gradually, the flow distribution of upper plenum and the 1st coolant channel will reduce, that of the lower dome and both the 1st and the 2nd moderator channel will increase gradually. The 1st coolant channel will have the flow reversal phenomenon most likely. The 1st and the 2nd moderator channel require a large orifice mode, the lower dome and the 1st coolant channel require a smaller orifice mode.
