【摘要】 热电偶柱及其支架结构安装于反应堆压力容器上腔室内的堆内构件压紧顶帽上,其完整性影响到反应堆的运行安全。本文对热电偶柱及其支架结构进行了自重载荷下静态分析、流致振动影响分析、模态分析、地震载荷和LOCA载荷下的反应分析。结果显示,原设计的螺栓无法承受含有LOCA载荷的D级工况。本文给出了结构受力规律和修改方案。修改设计后的结构安装于反应堆压力容器顶盖内,已投入正常运行。更多还原

【Abstract】 The thermocouple column assembly and support structure designed by AREVA is a new structure that has not been used in other nuclear power plants in the world.Structural integrity of the assembly and support is an important factor to the long-term safe operation of the plant.In this work,static analysis under dead weight,FIV influence analysis,modal analysis,seismic analysis,and LOCA analysis were performed.The results indicate that the bolts of initial design cannot bear the load of Service Level D with LOCA.Reasonable improvement measures and its reasons were proposed and assessed.The improved structure was installed in the reactor vessel closure head in the period of NPP shut-down and refueling.更多还原