HTR-PM侧反射层结构相似模型抗震试验与分析
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摘要
采用石墨键榫系统连接固定的HTR-PM堆芯在地震下表现出非线性特征。为研究HTR-PM堆芯的非线性响应,清华大学核能与新能源技术研究院开展了堆芯侧反射层结构的1∶3相似模型抗震试验。试验模型由石墨砖、碳砖、石墨圆榫、方键和燕尾键组成。试验分下筒无球、下筒有球和全模型有球3种工况。每种工况分别施加白噪声、OBE、SSE等多种载荷。通过试验获得了侧反射层模型的模态、加速度动态响应、位移动态响应等结果。试验加载符合安全标准,堆内构件在地震载荷下的完整性得到验证。
The core of HTR-PM which is fixed and connected with keys and dowels system,exhibits nonlinear characters under seismic loads.A seismic test of 1∶3 scaled side-reflector was conducted by Institute of Nuclear and New Energy Technology of Tsinghua University aiming to investigate the HTR-PM core nonlinear response.The model was made of graphite bricks,carbon bricks,graphite dowels and keys.Random loads,OBE loads,SSE loads were applied under conditions including lower-barrel without ceramic pebbles,lower-barrel with ceramic pebbles and whole model with ceramic pebbles.Thus,modes,acceleration dynamic responses and displacement dynamic responses are obtained.According with safety standards,the integrity of the HTR-PM core internals under seismic conditions is confirmed.
The core of HTR-PM which is fixed and connected with keys and dowels system,exhibits nonlinear characters under seismic loads.A seismic test of 1∶3 scaled side-reflector was conducted by Institute of Nuclear and New Energy Technology of Tsinghua University aiming to investigate the HTR-PM core nonlinear response.The model was made of graphite bricks,carbon bricks,graphite dowels and keys.Random loads,OBE loads,SSE loads were applied under conditions including lower-barrel without ceramic pebbles,lower-barrel with ceramic pebbles and whole model with ceramic pebbles.Thus,modes,acceleration dynamic responses and displacement dynamic responses are obtained.According with safety standards,the integrity of the HTR-PM core internals under seismic conditions is confirmed.
引文
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[2]赖士刚,孙立斌,张征明.石墨堆芯结构抗震研究[J].核技术,2013,36(4):20-28.LAI Shigang,SUN Libin,ZHANG Zhengming.Seismic research on graphite reactor core[J].Nuclear Techniques,2013,36(4):20-28(in Chinese).
[3]THEYMANN W,KEMTER F,SCHMIDT G.Seismic behavior of the core structure in a medium-sized HTR[C]∥SMiRT 10.Anheim,CA,USA:[s.n.],1989.
[4]IKUSHIMA T,NAKAZAWA T.A seismic analysis method for a block column gas-cooled reactor[J].Nuclear Engineering and Design,1979,55:331-342.
[5]SHIOZAWA S,FUJIKAWA S,IYOKU T,et al.Overview of HTTR design features[J].Nuclear Engineering and Design,2004,233:11-21.
[6]田清,孙立斌,王海涛,等.HTR石墨砖单柱模型抗震试验与分析[J].核动力工程,2012,33(2):42-46.TIAN Qing,SUN Libin,WANG Haitao,et al.Seismic tests and analysis of HTR graphite single column model[J].Nuclear Power Engineering,2012,33(2):42-46(in Chinese).
[7]田清.高温气冷堆石墨单柱和双层结构的动力学特性试验研究[D].北京:清华大学,2011.
[8]SUN Libin,SHI Li,WANG Hongtao,et al.Seismic test and analyses on double-layer model of HTR-PM graphite structure[C]∥20th International Conference on Nuclear Engineering.Anaheim,California,USA:[s.n.],2012.
[9]孙立斌,史力,王洪涛,等.高温气冷堆石墨堆芯结构双层模型抗震研究[J].原子能科学技术,2012,46(增刊):839-844.SUN Libin,SHI Li,WANG Hongtao,et al.Seismic study on double-layer model of HTR graphite core structure[J].Atomic Energy Science and Technology,2012,46(Suppl.):839-844(in Chinese).
[10]KLEINE-TEBBE K A,KEMTER F.Seismic behavior of the core cavern of a HTGR with pebble bed core[R].San Dieago,CA,USA:IAEA,1982.