Abstract
In order to establish and predict the flow and pressure distribution of the reactor coolant system of SMR under steady-state operating conditions, so as to provide an important design input for the thermal-hydraulic design of the reactor. This study is based on the flow characteristics of the SMR with multiple flow paths and multiple nodes and hydraulics property, and two numerical methods are established for the hydraulic analysis of the circulation system. For the flow that can be simplified into the flow path and the node, the finite element analysis method is combined with the quasi-linear processing of the flow and the head loss to realize the flow distribution calculation of the circulation system; For the upper head bypass flow with a certain pressure distribution, the method of bisection is used to achieve calculation of such type flow. The research results show that the numerical method established can be used for the flow and pressure distribution of the reactor coolant system of SMR, and the numerical calculation results are in line with expectations.
