共查询到18条相似文献,搜索用时 46 毫秒
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根据华南地区现今地球动力学环境、新构造特征、发震构造模型、第四纪构造活动、地球物理场等方面的差异,通过具体的实例,有针对性地论述了弥散地震区划分的方法,系统地阐述了华南地区弥散地震的评价依据.对于弥散地震区内与已知发震构造无关的最大历史地震,给出了两种情况下确定弥散地震的方法,探讨了总体地震和构造活动水平与弥散地震的关系.华南地区弥散地震活动的评价结果与地球动力学环境特征密切相关,地震构造背景的一致性是进行弥散地震类比的基础.本文除了论述弥散地震活动评价方法之外,还初步给出了华南地震区弥散地震区划分方案和弥散地震评价结果. 相似文献
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结合十多年来我国核电厂厂址选择中地震调查与评价工作的基本经验,阐述了核电厂厂址选择中的地震调查与评价的阶段划分及其有关内容 相似文献
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弥散地震评价的原则与方法研究 总被引:3,自引:0,他引:3
本文论述了弥散地震的概念及其由来,分析了当前对弥散地震存在的几种不同认识以及弥散地震对工程抗震设计基准影响的特点,在上述基础上研究和探讨了弥散地震评价的原则与方法。 相似文献
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Tian Shengqing 《地震地质》1993,15(4):296
On the basis of ten-years major expecrience in investigation and evaluation of earthquakes in nuclear power plant siting in our country, the stage and content associated with investigation and evaluation are outlined in this paper. 相似文献
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辽宁省瓦房店温坨子是东北地区第一个被选用的核电站厂址。但在厂址认定过程中对一些地震地质问题存在不同看法,为此,进行了一两年的深入研究。本文着重介绍了这个认定过程中的几个地震地质问题;针对这些问题进行的三方面的研究以及研究工作取得的认识。 相似文献
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通过对地震资料可靠性的分析,阐述了在核电厂厂址地震安全性评价中重新测定震源位置的必要性,提出了改善地震定位精度的途径,并且给出了通过重新定位改变地震活动图象的例证 相似文献
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概要地介绍了日本核电厂抗震设计及选址中活断层评价的原则与方法、活断层调查程序和评价标准,以及活断层评价的经验与特点 相似文献
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DISCUSSION ON THE SPECTRA SHAPE OF SEISMIC MARGIN EARTHQUAKE OF NUCLEAR POWER PLANT IN CHINA 下载免费PDF全文
Fukushima nuclear accident caused widespread concern of earthquake initiated severe accident. Under this background, China nuclear utilities carried out research and application of seismic margin assessment(SMA)approach to evaluate the seismic margin of the existing nuclear power plants(NPP)by different spectra shape of seismic margin earthquake(SME). By reviewing the method used to determine SME of operational NPP in central and eastern United States(CEUS), this paper analyzed the seismic hazard characteristic of China NPP sites, contrasted the design basis ground motion between NPP in CEUS and China, and suggested giving priority to evaluating the seismic margin of operational NPP that adopted the improved second generation technology for the urgency and importance of assessment on the actual seismic capacity of NPP. Comparing RG1.60 spectrum to normalized site-specific SL-2 level acceleration spectra, we found that some normalized spectra overtook the RG1.60's in high frequency range, so it is not always adequate to scale RG1.60 spectrum to evaluate the seismic margin for sites of the improved second generation NPP. We selected a sample site whose site-specific SL-2 level ground motion is close to the standard design of improved second generation NPP(0.2g scaled RG1.60 spectrum)to determine the seismic margin earthquake by probabilistic seismic hazard analysis method of the sample site. Compared to the given PGA(0.3g)scaled scenario earthquake ground motions and the uniform hazard response spectrum(UHRS), whose PGA is 0.3g to PGA(0.3g)scaled standard spectra(median NUREG/CR0098 spectrum and RG1.60 spectrum), the results demonstrated that uniform hazard response spectrum and scaled scenario earthquake ground motions are both significantly higher than the PGA scaled median NUREG/CR0098 spectrum, and all the three spectra are enveloped by PGA scaled RG1.60 spectrum. Then, this paper suggests adopting the uniform hazard response spectrum or scenario earthquake ground motions to evaluate the seismic margin of improved second generation NPP beyond site SL-2 ground motion; and to evaluate the seismic margin of improved second generation NPP beyond standard design, we recommend to use PGA scaled RG1.60 spectrum. 相似文献