Design and Analysis of Integrated Heat Transfer Test Facility for Gas-Cooled Microreactor Core Components

In response to the requirements for comprehensive heat transfer testing of gas-cooled microreactor core components, this study conducted detailed design and analysis of the test facility. The research encompassed the design principles of the test facility, determination of key parameters, structural design of the test section, and optimization of the startup process. Numerical simulation and pre-analysis methods were employed to systematically investigate the startup process of the test facility and the design scheme of the test section. The results indicate that the startup process control of the test facility is reasonable, and the structural design of the test section meets technical requirements, achieving design targets of 50℃ at the helium fan inlet, 489℃ at the core inlet, and 750℃ at the core outlet, while maintaining a stable helium pressure of 1.6 MPa at the test loop inlet. The comparison between experimental data and simulation results for graphite temperature demonstrates good consistency, validating the reliability of the computational model. The research results not only provide a feasible validation test platform for comprehensive heat transfer testing of gas-cooled microreactor core components, but also lay an important foundation for the subsequent development and verification of high-temperature helium equipment components.