Study on stable multi-layer molten pool experiment with internal heat generation in ERVC-IVR strategy

Abstract

Since oxide and metal materials are not miscible and Uranium extraction, the molten reactor core could turn into a multi-layer configuration molten pool in the Reactor Pressure Vessel (RPV). Three-layeR cOupled heat tranSfer molten pool Experiment (TROSE) is established with a three-dimension hemispheric test section. Two preliminary tests are carried out, and these tests use water to simulate both the top and middle layers and Cerrobend alloy to simulate the bottom layer. TROSE results demonstrate that upward heat transfer direction is found at the interface of the middle and bottom layers, and the power split ratio of the middle layer is about 1.0. The top and middle layers have an increasing trend of sideward heat flux; however, the bottom layer shows a different trend due to crust formation. Generally, the calculated results of Churchill-Chu, BALI, and COPRA correlations are close to the experimental sideward heat flux of the different layers in the multi-layer configuration. This three-dimension study provides additional experiment data for the three-layer configuration in IVR strategy for a new Chinese passive nuclear power plant.