CEFR堆芯燃料组件抗震试验方法研究

Study of Anti-seismic Test Method for CEFR Fuel Subassembly

为了验证中国实验快堆(CEFR)堆芯燃料组件的抗震性能,保证地震下结构完整性和气密性,必须研究制定兼具代表性和包络性的堆芯组件抗震试验方法。本文基于俄罗斯组件耐振试验方案分析,结合国内试验规范和堆芯实际约束条件,提出了一套新的组件抗震试验方法,并通过分析计算论证新方法的合理性。结果表明:新方法的试验结果是保守的,可保证在相同地震输入下单组件应力、冲击响应基本能包络处于堆芯组件群中的组件响应,新方法要求单根组件分别在刚性台架和柔性台架上依次完成抗震试验。本文结果对快堆堆芯组件的抗震试验研究具有重要指导意义。

To verify the anti-seismic performance of China Experimental Fast Reactor(CEFR)fuel subassembly and to ensure structural integrity and fuel rod sealing under earthquakes,it is necessary to develop an anti-seismic test method that can reflect the representativeness and meanwhile the envelopment of the entire core seismic response.Based on the analysis of the Russian vibration resistance test program,meanwhile considering the domestic test regulation and the actual core constraint condition,an anti-seismic test method was proposed.The rationality of the new method was verified through simulation calculations.The results show that the test results of the new method should be conservative,which ensures that the stress and shock response of a single fuel subassembly under the same seismic input can basically envelope the response of each fuel subassembly located in the core subassembly array.The new method requires a single fuel subassembly to complete the anti-seismic test on the rigid bench and flexible bench respectively.This study will serve as a good reference guide for the anti-seismic test studies of fast reactor core subassembly.