Abstract
Segments of welded small-bore A-106 carbon steel from a piping system that experienced severe flow-accelerated corrosion were characterized for surface damage due to flow-accelerated corrosion (FAC). A computational fluid dynamics (CFD) analysis was done to compare findings of CFD model versus observed surface FAC damage inside the pipes. CFD results expressed in terms of turbulence intensity showed good agreement with actual surface damage due to FAC. It was concluded that the presence of internal grooves would cause turbulent flow regime, and therefore, it would cause pipe material damage.
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Abbreviations
- \( {\text{AR}} \) :
-
Groove aspect ratio
- \( {\text{AR}}_{\text{damp}} \) :
-
Damp distance aspect ratio
- \( D \) :
-
Hydraulic diameter (m)
- \( d \) :
-
Groove depth (cm)
- \( I \) :
-
Groove length (cm)
- \( l^{*} \) :
-
Damp distance (cm)
- \( Re \) :
-
Reynolds number
- \( {\text{RF}} \) :
-
Refinement factor
- \( \Delta t \) :
-
Time step (s)
- \( U \) :
-
Mean velocity (m/s)
- \( u' \) :
-
Root-mean-square of the turbulent velocity fluctuations (m/s)
- \( u_{ \hbox{max} } \) :
-
Maximum velocity at the entire domain (m/s)
- \( V \) :
-
Free stream velocity (m/s)
- \( v^{*} \) :
-
Friction velocity (m/s)
- \( \Delta x \) :
-
Smallest length of the generated nodes (m)
- \( y^{ + } \) :
-
Dimensionless wall distance
- \( \rho \) :
-
Density (kg/m3)
- \( \mu \) :
-
Dynamic viscosity (Pa s)
- \( \tau_{\text{wall}} \) :
-
Wall shear stress (Pa)
- \( x \) :
-
Direction of x-axis
- \( y \) :
-
Direction of y-axis
- \( z \) :
-
Direction of z-axis
References
W.H. Ahmed, Flow Accelerated Corrosion in Nuclear Power Plants. (INTECH Open Access Publisher, 2012)
W.H. Ahmed, M.M. Bello, M. El Nakla, A. Al Sarkhi, Flow and mass transfer downstream of an orifice under flow accelerated corrosion conditions. Nucl. Eng. Des. 252, 52–67 (2012)
V. Kain, S. Roychowdhury, T. Mathew, A. Bhandakkar, Flow accelerated corrosion and its control measures for the secondary circuit pipelines in Indian nuclear power plants. J. Nucl. Mater. 383(1–2), 86–91 (2008)
S. Nasrazadani, R. Nakka, D. Hopkins, J. Stevens, Characterization of oxides on FAC susceptible small-bore carbon steel piping of a power plant. Int. J. Press. Vessels Pip. 86(12), 845–852 (2009)
K. Fujiwara, M. Domae, K. Yoneda, F. Inada, T. Ohira, K. Hisamune, Correlation of flow accelerated corrosion rate with iron solubility. Nucl. Eng. Des. 241(11), 4482–4486 (2011)
V. Kain, S. Roychowdhury, P. Ahmedabadi, D.K. Barua, Flow accelerated corrosion: experience from examination of components from nuclear power plants. Eng. Fail. Anal. 18(8), 2028–2041 (2011)
C.H. Lin, Y.M. Ferng, Predictions of hydrodynamic characteristics and corrosion rates using CFD in the piping systems of pressurized-water reactor power plant. Ann. Nucl. Energy 65, 214–222 (2014)
H. Rani, T. Divya, R. Sahaya, V. Kain, D. Barua, CFD study of flow accelerated corrosion in 3D elbows. Ann. Nucl. Energy 69, 344–351 (2014)
L. Zeng, G. Zhang, X. Guo, C. Chai, Inhibition effect of thioureidoimidazoline inhibitor for the flow accelerated corrosion of an elbow. Corros. Sci. 90, 202–215 (2015)
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Bagheri, A.H., Nasrazadani, S. & Bostanci, H. Impact of Internal Pipe Grooves on Flow-Accelerated Corrosion of Small-Bore A-106 Carbon Steel Pipes. J Fail. Anal. and Preven. 17, 417–425 (2017). https://doi.org/10.1007/s11668-017-0237-z
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DOI: https://doi.org/10.1007/s11668-017-0237-z