Contrast of Aseismic Design for NPP Pressure Pipelines of Class 2
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摘要: RCC-M、ASME(2007版)及GB 50267-97为目前核电厂设备、系统、部件设计所遵循的主要技术标准,3者对核电厂部件的分级基本相当,在核2级承压管道设计方面的规定内容相似但不完全相同。在地震输入方法上,GB 50267-97、ASME(2007版)及RCC-M基本相同,GB 50267-97中硬土场地的水平向标准反应谱相对偏于安全。RCC-M规范侧重压力的影响,而GB 50267-97和ASME(2007版)规范更侧重考虑自重及地震等偶然荷载的影响,在D级评定准则条件下,RCC-M相对于GB 50267-97和ASME(2007版)的规定保守。实例分析表明,在压力不大且应力增加系数相同的情况下,GB 50267-97、ASME(2007版)的评价准则较RCC-M偏于安全,而支管连接的应力增加系数GB 50267-97、ASME(2007版)比RCC-M小得多。Abstract: At present,the RCC-M of French,ASME(2007) of U.S.A and GB50267-97 of China are the primary nuclear technical codes for the design of facilities,systems,and components,which are similar in the classification of nuclear facilities in nuclear power plants,but are not exactly the same in the piping design clauses of the class 2 pressure pipeline.For the earthquake input methods,GB,ASME and RCC-M are basically similar.The hard soil standard response spectrum of GB is relatively safer.RCC-M emphasizes on the impact of the pressure,the GB50267-97 and ASME emphasize more on the weight and other occasional loads such as earthquakes effects.RCC-M is safer than GB and ASME in level D criteria.Case analysis shows that in the conditions of lower pressure and the same stress intensification factor,GB and ASME criteria are safer than RCC-M.
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Key words:
- Nuclear power plants /
- Piping design /
- Aseismic design /
- Code /
- Contrast
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