Simulation Analysis of Start-up and Shutdown of HTR-PM Based on THERMIX/BLAST and vPower

An engineering simulator of HTR-PM is developed by embedding THERMIX code into the vPower simulation platform.The double reactor cold start-up and shutdown processes are simulated on the engineering simulator,to analyze the changing of the critical data such as the reactor power,helium mass flow,inlet/outlet parameters of steam generator and inlet vapor parameters of turbine in these two conditions.The operation features of the double reactor cold start-up and shutdown processes are summarized.The results show that the two reactors influence each other during the operation and the parameter changes in the secondary loop are the combined results from two reactors.