供热堆有盒组件地震动态响应分析

Dynamic response analysis of fuel assembly with channel for nuclear heating reactor during seismic loading

结合大庆 2 0 0 MW低温核供热示范工程 ,针对有盒组件结构的具体特点 ,提出了地震工况下燃料组件与燃料元件盒相互作用的动态响应分析模型 ;采用通用大型结构线性、非线性有限元分析程序 ADINA,对燃料组件与其外侧的燃料元件盒在地震工况下的相互撞击作用进行了非线性动态响应分析 ;分析了支承条件和主要参数变化对动态响应过程的影响 ;得到了动态响应过程中模型结构各部分的力和位移随地震加速度时程变化的过程曲线 ;校验了2 0 0

The dynamic response of the fuel assembly and fuel channel interaction during a seismic event is analyzed to study the structural characteristics of the reactor fuel assembly as part of the Daqing NHR 200 project. The finite element program for automatic dynamic increment nonlinear analysis (ADINA) is used to predict the non linear dynamic response due to collisions between the fuel assembly and the fuel channel during seismic events. The results are used to analyze factors affecting the dynamic response, such as boundary support conditions and changes of the main model parameters. Curves are presented for the forces and frame displacements following the seismic excitation. The results verify the structural integrity of the fuel assembly including the channel in the NHR 200 design when subjected to seismic loading and verify that the cruciform control rod can still be inserted.