Effect of power uprate on core damage frequency in a MBLOCA with multiple operator actions

The simulation results showed that the CND failure probability increased by 23% after the power uprate. The sequence CDF increased by 16% after the power uprate. The results of the importance analyses indicated that the time to execute CND was not a significant factor in determining the success of CND. The uncertainty involved in the simulations of reactor coolant system thermal hydraulic responses is important in the determination of human error probability.