PERFORM:HIGH TEMPERATURE AND PRESSURE CHF EXPERIMENT BENCH UNDER SIX DEGREES OF FREEDOM MOTION CONDITION

The critical heat flux is the heat flux when the heat transfer on the surface of the nuclear fuel element deteriorates. Once CHF occurs, the fuel element temperature will rise sharply, resulting in a serious nuclear accident. Motion conditions impact the nuclear reactor in a number of ways, including the micro-level CHF mechanism as well as the flow and heat transfer characteristics and bubble distribution in the core. As a result, conducting the CHF test under motion conditions is required. In this study, a high temperature and pressure CHF experiment bench under six degrees of freedom motion condition named PERFORM was designed and built. The test bench was then used for benchmark tests, parameter control during the test was tested and analyzed, and the CHF test results were compared and analyzed with LOOK-UP-TABLE. The findings demonstrate that there is typically less than a 10% difference between the test data of the benchmark test and the LOOK-UP-TABLE approach, indicating the reliability of the PERFORM bench and the accuracy of the CHF test results that are derived from it.