Experimental And Theoretical Research On 2D Fluid-structure Interaction For Seismic Analysis Of Fuel Assembly In Fast Breeder Reactor

Fuel assemblies of fast breeder reactor core (FBR) submerged in the liquid sodium may vibrate during the earthquake, which possibly leads components of the core to structural failure and affects structural integrity and safety qualification of the core. Coolant fluid of the reactor make the vibration of the assemblies to appear nonlinear. So, It is great important to study the seismic-induced fluid-structure interaction for seismic capability of FBR core. This paper first will be through the study of fluid-structure interaction vibration test to simulate vibraton responses of fuel assemblies under fluid environment, to observe the fluid force on the fuel assemblies, abtaining the effects of fluid on the frequency, damping, added mass and added damping. And also in this paper will propose some new and corresponding the test fluid-structure interaction calculation model of FBR fuel assemblies. The last, through the theoretical values of the calculation model compared with the experimental values to prove that fluid-structure interaction calculation model of FBR fuel assemblies is accurate, can be applied engineering. The basic work will provide experimental datas and theoretical basis for the numerical method on seismic behavior research of fast reactor fuel assembly.