高温堆堆芯支承结构比例模型抗震试验研究  

Seismic Test Study on Scale Model of High Temperature Reactor Core Supporting Structure

作　　者：王德鑫 王洪涛[1] 史力[1] 孙立斌[1] WANG Dexin;WANG Hongtao;SHI Li;SUN Libin(Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学核能与新能源技术研究院,北京100084

出　　处：《原子能科学技术》2023年第2期420-427,共8页Atomic Energy Science and Technology

基　　金：国家科技重大专项(2008ZX06901-005)。

摘　　要：高温气冷堆是国际核能届公认的第4代反应堆6种堆型之一,也是我国科技重大专项支持研发的新堆型,其石墨堆芯支承结构是散体结构,在地震载荷作用下的结构动力学响应和连续体结构有较大不同,表现出强烈的非线性和离散性。在已经开展的抗震研究基础上,设计并开展了HTR-PM石墨堆芯支承结构1∶4整体模型抗震试验研究,分析了抗震试验过程中测得的动态特性数据,与模型试验结果进行了对比,得到了模型的加速度和位移变化规律:模型的加速度随着模型高度增加而增大;石墨砖的位置越高,其响应振幅越大。由结构的各种动态响应特性及其分布规律可得,高温气冷堆堆芯支承结构设计能够满足抗震设计要求。The high temperature gas-cooled reactor is one of the six types of the fourth-generation reactors recognized by the international nuclear energy community. It is a new reactor type supported by China’s major scientific and technological projects. The graphite core supporting structure is a discrete structure, and its structural dynamic response under seismic load is quite different from that of continuous structure, showing strong nonlinear and discrete characteristics of structural dynamics. Based on the seismic research of HTR-PM, this work designed and conducted a 1∶4 overall model seismic test of the HTR-PM graphite core supporting structure, and evaluated the seismic performance of the HTR-PM graphite core structure. In the seismic test of the 1∶4 overall model, the boundary conditions such as the graphite core structure and its external supporting were simulated and simplified as close to the actual core as possible. According to the experience of several previous seismic tests, this test also made some optimizations in the measurement of model acceleration, and improved the sampling frequency of the acceleration sensor. According to on-site observation, the control rod can fall smoothly under strong earthquake, which proves that its design strength is sufficient to cope with seismic excitation. When the model is dismantled, all graphite bricks remain structurally intact, and none of the graphite tenon-bonds are damaged. The bearing parts have obvious compression marks which are subjected to repeated alternating loads under seismic loads, but do not break, which prove that the design strength is sufficient to cope with seismic excitation. The Seismosignal software was used to process the test data, and the seismic performance of the graphite core was systematically studied. The dynamic characteristic data measured during the seismic test were analyzed, and the variation laws of the acceleration and displacement of the model were obtained: The acceleration value of the model increases with the height o

关 键 词：高温气冷堆 石墨堆芯支承结构 抗震试验 加速度 工程设计验证 

分 类 号：TL351[核科学技术—核技术及应用]