卧式铅铋堆芯氧化腐蚀特性研究

In order to study the oxidation corrosion characteristics of horizontal lead-bismuth reactor core, a liquid lead-bismuth oxidation corrosion model was established in this study. Based on computational fluid dynamics method, the self-defined source term method of transport equation was used to realize coupling calculation. The results show that the thickest oxidation layer on the fuel rod surface of the reactor core is located at the outlet position under the reference condition, and the oxidation layer on the fuel rod surface at the center is significantly higher than that near the fuel assembly box. After 10,000 hours, the surface of the fuel rod at the center still maintained a double oxide layer structure, and the average total thickness of the double oxide layer was 1.32 μm. This study provides a numerical simulation method for the oxidation corrosion characteristics of lead-bismuth reactor cores, which can be used for the prediction of oxidation corrosion of lead-bismuth reactor cores.