Abstract High density polyethylene (HDPE) pipe has many advantages over metallic pipe, and has been used in non-safety related application for years in some nuclear power plants (NPPs). Recently, HDPE pipe was introduced into safety related applications. The main difference between safety-related and non-safety-related pipes in NPPs is the design method of extra loadings such as gravity, temperature, and earthquake. In this paper, the mechanical behavior of HDPE pipe under various loads in pipe gallery was studied by finite element analysis (FEA). Stress concentrations were found at the fusion regions on inner surface of mitered elbows of HDPE pipe system. The effects of various factors were analyzed, and the influence of various loads on the damage of HDPE pipe system were evaluated. The results of this paper provide a reference for the design of nuclear safety-related Class 3 HDPE pipe. In addition, as the HDPE pipes analyzed in this paper were suspended in pipe gallery, it can also serve as a supplementary reference for current ASME standard on Class 3 HDPE pipe, which only covers the application for buried pipe application.

中文翻译：

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核电站管廊高密度聚乙烯管的有限元分析

摘要 高密度聚乙烯（HDPE）管与金属管相比具有许多优点，在一些核电站（NPP）中已用于非安全相关应用多年。最近，HDPE 管道被引入安全相关应用。核电厂中安全相关管道与非安全相关管道的主要区别在于重力、温度和地震等额外载荷的设计方法。本文通过有限元分析(FEA)研究了管廊内不同载荷下HDPE管的力学行为。在 HDPE 管道系统斜接弯头内表面的融合区域发现了应力集中。分析了各种因素的影响，评估了各种载荷对HDPE管道系统损伤的影响。本文研究结果可为核安全相关的3类HDPE管材的设计提供参考。另外，由于本文分析的HDPE管道悬吊在管廊中，也可以作为目前ASME标准3类HDPE管道的补充参考，该标准仅涵盖埋管应用。