一体化快堆核岛厂房基底隔震对比分析研究  

Comparative Analysis on Seismic Base Isolation for Integrated Fast Reactor Nuclear Power Plant

作　　者：苗鑫 张博韬 刘一哲[1] 刘林顶[1] MIAO Xin;ZHANG Botao;LIU Yizhe;LIU Linding(Department of Nuclear Engineering Design,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院核工程设计研究所,北京102413

出　　处：《原子能科学技术》2025年第S1期140-147,共8页Atomic Energy Science and Technology

基　　金：中核集团集中研发项目。

摘　　要：为提高一体化快堆的极限安全地震动设计能力,拓宽其厂址适用范围,引入了基底隔震技术。针对一体化快堆核岛厂房整体质量大、刚度大的特点,研制了适用于本项目的铅芯橡胶隔震支座,并利用该系列隔震支座进行了核岛厂房的基底隔震设计。隔震设计以将极限安全地震动从0.2g提高至0.4g为目标,基于动力时程分析方法,分析了隔震核岛厂房结构的安全性,同时研究了整体隔震效果。分析结果表明,核岛厂房隔震层的安全性能满足规范要求,水平向隔震效果显著,当频率大于1 Hz时,抗震结构的水平向楼层反应谱可包络隔震结构的楼层反应谱。竖向地震动在0.4g输入地震动和隔震层的作用下被二次放大,需结合其他技术手段进一步实现提高竖向极限安全地震动的目标。The fast reactor is one of the principal reactor types in the fourth generation of nuclear power technologies worldwide.The integrated closed-cycle fast reactor nuclear energy system(referred to as the integrated fast reactor)is a nuclear energy system co-located within a single site.This system integrates the fast reactor,fuel regeneration subsystem(including spent fuel reprocessing and new fuel fabrication),and other supporting subsystems,achieving self-sustaining circulation of nuclear fuel within the site.To enhance the design ultimate safety ground motion of the integrated fast reactor and expand its site applicability,base isolation technology was introduced.Given the unique structural characteristics of the integrated fast reactor nuclear island plant,such as its large mass and high stiffness,customized parameters for lead rubber bearings were developed.These bearings were subsequently employed in the base isolation design of the nuclear island plant,aiming to increase the ultimate safety ground motion from 0.2g to 0.4g.The isolated and aseismic nuclear island plant was modeled and analyzed using ETABS software.Based on the time history analysis method,the safety of the isolated nuclear island plant structure was evaluated,and the seismic isolation effects,as well as the floor response spectrum under different elevations and seismic acceleration inputs,were systematically studied.The analysis results demonstrate that the safety performance of the isolation layer,designed using the developed lead rubber bearings,complies with the requirements of the relevant specifications.The horizontal seismic isolation effect of the nuclear island plant is significant.For frequencies above 1 Hz,the horizontal floor response spectrum of the non-isolated structure can envelop that of the isolated structure,indicating effective seismic energy dissipation.Considering the seismic resistance of the equipment,the isolation system meets the original horizontal seismic isolation design objectives.Furthermore,the isolation scheme

关 键 词：一体化快堆 核岛厂房 基底隔震 减震效果 

分 类 号：TL43.3[核科学技术—核技术及应用]