基于性能目标的一种核电站抗震设计方法研究

Research on performance objective-based seismic design method of nuclear power plant

核电站在设计基准期因地震可能引起的破坏与核电站抗震性能设计水准的高低有直接的关系。美国土木工程协会(ASCE)根据美国能源部门对电站在自然灾害下的设计理论做进一步的研究,提出了ASCE 43-05规范的设计方法。该方法运用了成熟的概率地震危险性分析和地震易损性分析基本原理,提出了基于性能目标的设计方法。由于我国还缺少这方面的研究,故系统推导了该方法,并给出了参数变化时该方法的两个性能目标达到的程度。另外,评估核电站结构、系统和组件(SSC)的高置信低失效(HCLPF)是目前评估核电站的主要指标,研究了ASCE 43-05规范设计方法的HCLPF值,得出了该方法在不同条件下满足性能目标的要求,和具备高置信低失效的要求。最后,进行了算例验证和计算分析,为今后我国核电站的设计提供技术参考。

There is a direct relationship between the damage of nuclear power plants due to an earthquake in design reference period and the level of plant design standards. American Society of Civil Engineers （ASCE） proposed ASCE 43 -05 standardized design method, which based on the further research of U. S. Department of Energy on plant design theory in natural disasters. The method used the basic and general principle of ripe probabilistic seis- mic hazard analysis and seismic vulnerability analysis, and derived the design method based on performance goals. Because of lack of research in this field, this paper deduced and described the two performance parameters of the method to achieve the performance goals. In addition, assessment of high confidence low probability failare （HCLPF） of nuclear power plant structures, systems and components （SSC） is a main method for nuclear power plants. This paper studies HCLPF value of the ASCE 43 -05 standard design method and draws a conclusion that the method meets performance requirements in different conditions, and has a high confidence low probability fail- ure requirement. Finally, an example analysis provides a technical reference for the future design of nuclear power plant in China.