Study on Fuel Assembly Gap Change Behavior Based on Fuel Assembly Vibration Analysis Software FAVA
The change of water gap in fuel assembly caused by fuel assembly vibration has an important influence on the power fluctuation in the reactor.In order to study the behavior of fuel assembly vibration and water gap variation,fuel assembly vibration analysis model is established according to fuel assembly structure and its vibration characteristics,and fuel assembly vibration analysis software FAVA is developed.Firstly,the fuel assembly vibration analysis model is validated by comparing with the commercial finite element software Abaqus.Secondly,by analyzing the change of water gap caused by fuel assembly vibration,the fuel assembly vibration frequency calculated by FAVA software is compared with the core power fluctuation frequency,which shows that the core power fluctuation is mainly caused by the fuel assembly vibration.Finally,the influence of stiffness change of fuel assembly on the vibration is analyzed.
fuel assemblyvibration analysisFAVAvalidationwater gap change
万方数据
维普
