Abstract
To study the transient thermal-hydraulic characteristics of lead and lead-bismuth eutectic (LBE) in the reactor, Relap5 MOD3.2 was adapted to add the physical properties and liquid metal flow model of lead and lead bismuth through secondary development without changing its original computing capability. Then, two examples are verified. One is the NACIE experiment facility, which is used to verify the feasibility of lead-bismuth fluid. The second is a 1000-MWt medium-power modular lead-cooled faster reactor M2LFR-1000 developed by University of Science and Technology of China (USTC), which is used to verify the feasibility of lead fluid. For NACIE facility, the model is compared with experimental data, the inlet and outlet temperature and flow rate are in good agreement. The steady-state and transient simulation of M2LFR-1000 reactor are carried out, and the simulation results of this program are compared with the simulation results of ATHLET program. The temperature errors of inlet and outlet of heat source are kept within 3%, and the flow errors are kept within 1%. Through the verification of the above two examples, it can be concluded that the program adapted in this paper can meet the accuracy requirements of the reactor thermal-hydraulic analysis program. In general, this program can be used for the safety analysis of lead reactor and lead-bismuth fast reactor.
