A Numerical Study on Flow-Accelerated Corrosion in Two Adjacent Elbows

• Journal title : Corrosion Science and Technology
• Volume 15, Issue 1,  2016, pp.6-12
• Publisher : The Corrosion Science Society of Korea
• DOI : 10.14773/cst.2016.15.1.6
Title & Authors
A Numerical Study on Flow-Accelerated Corrosion in Two Adjacent Elbows
Yun, Hun; Hwang, Kyeongmo; Moon, Seung-Jae;

Abstract
Flow-Accelerated Corrosion (FAC) is a well-known degradation mechanism that attacks the secondary piping in nuclear power plants. Since the Surry Unit 2 event in 1986, most nuclear power plants have implemented management programs to deal with damages in carbon and low-alloy steel piping. Despite the utmost efforts, damage induced by FAC still occurs in power plants around the world. In order to predict FAC wear, some computer programs were developed such as CHECWORKS, CICERO, and COMSY. Various data need to be input to these programs; the chemical composition of secondary piping, flow operating conditions and piping geometries. CHECWORKS, developed by the Electric Power Research Institute (EPRI), uses a geometry code to calculate geometry effects. Such a relatively simple geometry code is limited in acquiring the accuracy of FAC prediction. Recently, EPRI revisited the geometry code with the intention of updating it. In this study, numerical simulations were performed for two adjacent $\small{90^{\circ}}$ elbows and the results were analysed in terms of the proximity effect between the two adjacent elbows.
Keywords
flow accelerated corrosion;computation fluid dynamics;proximity;mass transfer coefficient;
Language
English
Cited by
References
1.
EPRI, TR-106611-R1, Flow-Accelerated Corrosion in Power Plant (2002).

2.
L. Fingjun, Y. Lin, X. Li, Anti-Corros. Method. M., 55, 66 (2008).

3.
J. M. Pietralik, B. A. Smith, Proceedings of the 14th Int'l Conference on Nuclear Engineering, p. 175, Miami, FL, US (2006).

4.
H. P. Rani, T. Divya, R. R. Sahaya, V. Kain, D. K. Barua, Ann. Nucl. Energy, 69, 344 ( 2014).

5.
J. P. Slade, T. S. Gendron, Proceedings of the 12th Int'l Conference on Environmental Degradation of Materials in Nuclear Systems, p. 773, Salt Lake City, UT, US (2005).

6.
J. M. Pietralik, C. S. Schefski, J. Eng. Gas Turb. Power., 133, 1 (2011).

7.
W. H. Ahmad, Ann. Nucl. Energy, 37, 598 (2010).