Experimental and computational failure analysis of a valve in a nuclear power plant

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	Experimental and computational failure analysis of a valve in a nuclear power plant
	C. B. Liu; S. L. Jiang; Y. G. Zheng
	2012
发表期刊	Engineering Failure Analysis
ISSN	1350-6307
卷号	22 页码:41284
摘要	A parallel slide valve of a nuclear power plant failed before its designed life. The failed part was on the belt eye (BE), which was manufactured from ASTM 216 WCB. In this paper, a failure analysis of the valve was performed by visual inspection, Vickers hardness measurement, scanning electron microscopy observation and Energy Dispersive Spectroscope analysis of the BE metal and oxide scale. Computational fluid dynamics method was employed to calculate the possible effect of cavitation erosion on the failed BE and to define the sensitive regions. The experimental results showed that the failure mode of the BE was a combination of flow-accelerated corrosion (FAC) and cavitation erosion. The FAC characteristic "orange peel" appearance was observed on the inner surface of the BE. Significant wall thinning occurred due to formation of an unprotective oxide on the metal. Simulation results showed that it is not the Venturi-like shape inside the valve but the misalignment between the reducer and the BE in the valve that caused the cavitation erosion. Moreover, cavitation enhanced the turbulence intensity and eventually increased the local FAC rate. (C) 2011 Elsevier Ltd. All rights reserved.
部门归属	[liu, c. b.; jiang, s. l.; zheng, y. g.] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;zheng, yg (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;ygzheng@imr.ac.cn
关键词	Carbon Steel Cavitation Erosion Flow-accelerated Corrosion Power Plant Valve Failures
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60102
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. B. Liu,S. L. Jiang,Y. G. Zheng. Experimental and computational failure analysis of a valve in a nuclear power plant[J]. Engineering Failure Analysis,2012,22:41284.
APA	C. B. Liu,S. L. Jiang,&Y. G. Zheng.(2012).Experimental and computational failure analysis of a valve in a nuclear power plant.Engineering Failure Analysis,22,41284.
MLA	C. B. Liu,et al."Experimental and computational failure analysis of a valve in a nuclear power plant".Engineering Failure Analysis 22(2012):41284.