The Current Status of New Czech Corrosion Fatigue Evaluation Proposal for WWER Nuclear Power Plants

Procedia Materials Science Pub Date : 2016-01-01 DOI:10.1016/j.mspro.2016.03.004

Libor Vlček

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Abstract

Presented paper introduces an innovative principle of fatigue life assessment suggested for WWER nuclear power plants. The subject of this work is to take into account the corrosion environment influence in actual methodology of low-cycle fatigue (LCF) assessment and prediction. The aim of this paper is to summarize the current status of the Czech proposal of corrosion fatigue assessment and prediction. The first project focused on base steel materials, which are used in primary circuit of WWER-440, started in 2010. The basic idea of Czech environmental fatigue correction factor has been introduced on international PVP conference in 2013. The new project linked to the previous one is focused on the additional area of welding joints. Theoretical base is completed by experimental verifications of proposed environmental correction factor. The subject of actually running theoretical-experimental program covers similar metal welds of austenitic stainless steel 08CH18N10T and results will be available in 2015. Moreover LCF tests in corrosion environment of dissimilar metal welds are under preparation. Experimental work is based on LCF strain-controlled tests in primary water environment of WWER-440.

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WWER核电站新捷克腐蚀疲劳评价方案现状

本文介绍了WWER核电站疲劳寿命评估的创新原则。本工作的主题是在实际的低周疲劳评估和预测方法中考虑腐蚀环境的影响。本文的目的是总结捷克提出的腐蚀疲劳评估和预测的现状。第一个项目于2010年开始，重点是用于WWER-440初级回路的基础钢材料。捷克环境疲劳修正系数的基本思想在2013年国际PVP会议上被介绍。与前一个项目相关的新项目侧重于焊接接头的附加区域。通过实验验证了所提出的环境修正系数，为理论基础的建立奠定了基础。实际运行的理论实验项目涉及奥氏体不锈钢08CH18N10T的类似金属焊缝，将于2015年得出结果。此外，异种金属焊缝腐蚀环境下的LCF试验也在进行中。实验工作以WWER-440原生水环境下LCF应变控制试验为基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Procedia Materials Science

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