COMPUTATION OF BOILING WATER REACTOR ANNULUS FLOW LOADS USING 2D POTENTIAL FLOW METHODOLOGY AND 3D FINITE ELEMENT ANALYSIS: A COMPARATIVE STUDY

摘要

During a Loss of Coolant Accident (LOCA) in a Boiling Water Reactor (BWR), subcooled water flows past jet pump assemblies located in the annular region between the Reactor Pressure Vessel (RPV) and the shroud as it moves toward the break location and is subsequently discharged from the RPV. Flow loads caused by such an event are required design basis loads that must be considered for BWR internal components. A comparison is presented between BWR annulus flow loads calculated by the 2D potential flow methodology using complex variables and the 3D finite element method using the heat transfer analogy described in PVP2016-63091 [1]. The comparison demonstrates that greater solution fidelity is available using the FEA method. The results also demonstrate the importance of applying the appropriate velocity correction factor when flow loads are computed using complex variable techniques.