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| CORROSION FATIGUE OF NUCLEAR--GRADE STAINLESS STEEL IN
HIGH TEMPERATURE WATER AND ITS ENVIRONMENTAL FATIGUE DESIGN MODEL |
| WU Xinqiang1, 2), XU Song1, 2), HAN En-Hou1, 2), KE Wei1, 2) |
1) State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
2) Liaoning Key Laboratory for Safety and Assessment Technique of Nuclear Material, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 |
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Cite this article:
WU Xinqiang XU Song HAN En-Hou KE Wei. CORROSION FATIGUE OF NUCLEAR--GRADE STAINLESS STEEL IN
HIGH TEMPERATURE WATER AND ITS ENVIRONMENTAL FATIGUE DESIGN MODEL. Acta Metall Sin, 2011, 47(7): 790-796.
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Abstract The high safety of light water reactor nuclear power plants (NPPs) requires very strict design standard and service property of pressure boundary components materials. The service degradation and life assessment of the components materials primarily depend on the understanding of environmentally assisted failure mechanism, accumulation of service property data and construction of evaluation models. Currently domestic NPPs are relying on foreign design, operation and life assessment standards. However, recent experimental data indicate that even the ASME design fatigue code may be deficient in safety margin under certain conditions of loading and environment. In the present work, based on the corrosion fatigue tests in simulated NPPs' high temperature pressurized water, the corrosion fatigue behavior and environmentally assisted failure mechanism of domestic nuclear-grade stainless steel have been investigated. The factors affecting fatigue life of nuclear grade stainless steel in high temperature water were evaluated. A design fatigue model was constructed by taking environmental degradation effects into account and the corresponding design curves were given for the convenience of engineering applications.
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Received: 23 March 2011
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| Fund: Supported by National Basic Research Program of China (No.2011CB610506) and National Science and Technology Major Project (No.2011ZX06004-009) |
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