Structural Analysis of PWR Fuel Assemblies in LOCA and Seismic Conditions

摘要

The purpose of this paper is a general presentation of the analyses performed by Fragema to evaluate the effects of the LOCA and the SSE (Safe Shutdown Earthquake) on the PWR Fuel Assembly structure. This evaluation requires much complex analysis such as the thermohydraulic effects of blowdown, seismic loading generation and structural model development of the reactor and fuel assembly. The following main points are developed: fuel assembly safety requirements, fuel assembly behaviour under LOCA and SSE conditions, organizational flow chart, fuel assembly modelling, fuel assembly analysis and typical results. (ERA citation 11:029770)