CFD Simulation of Reactor Internal Flow in the Scaled APR+

摘要

A series of 1/5 scale reactor flow model tests have been conducted in order to determine the hydraulic characteristics of the APR+ (advanced power reactor plus). The objective of test was to determine the core inlet flow field of the model reactor in order to provide input information required by the open core thermal margin analysis code such as TORC. In this study, in order to examine the validity of the results of reactor flow model tests and the applicability of CFD (computational fluid dynamics) in the simulation of reactor internal flow, CFD simulation was conducted with the commercial multi-purpose CFD software, ANSYSCFX V.14. It was found that the velocity field in the downcomer had the inhomogeneous feature. Relative high velocity region was located in the core region. This result was different from measurement and this difference may result from the fact that some internal structures were not modeled with the real geometry but treated as the porous domain.