抄録
The HDR specimen was a large scale representation of a typical pressurized water reactor. The specimen had a core support barrel with a mass ring attached on its bottom to simulate the core weight. The core barrel and surrounding subcooled water were instrumented to measure displacement, strain, pressure difference, absolute pressure and temperature at numerous locations during pipe break test. In this proceeding a procedure to calculate the responses of the core barrel with acoustic and (structural) shell and solid finite elements is presented. The analysis was carried out using acoustic-structural coupling feature available in Abaqus/Standard software. The natural boundary condition needed for the pipe break was derived from the mass flow results of the system analysis code APROS. The theoretical basis of the boundary condition derivation and its use in acoustic analysis is explained. The displacement and strain results obtained for the core barrel showed good agreement with the measurements up to 0.15 seconds. It is concluded that the presented procedure yields same order of accuracy as the FSI analysis with computational dynamics codes presented in the literature.
