Research on Behavior of Migration for Molten Material in U-Al Alloy Fuels Under Severe Accident

Abstract

U-Al alloy fuels have been applied in research reactors, and it is different from typical pressurized water reactors in geometry and components. This paper conducts a theoretical analysis on migration behavior of molten material in U-Al alloy fuels, and numerical simulation in SPERT research reactor, studying the migration behavior of molten material. The result shows that the number of cracks in cladding has significant influence on migration.