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Effects of Turbulence Penetration on Valve Leakage in Nuclear Reactor Coolant System

Authors: Gupta Rajesh, Paudel Sagar, Sharma Utkarsh, Singh Amit Kumar


Thermal stratification has drawn much attention because of the malfunctions at various nuclear plants in U.S.A that raised significant safety concerns. The concerns due to this phenomenon relate to thermal stresses in branch pipes connected to the reactor coolant system piping. This stress limits the lifetime of the piping system, and even leading to penetrating cracks. To assess origin of valve damage in the pipeline, it is essential to determine the effect of turbulence penetration on valve leakage; since stratified flow is generally generated by turbulent penetration or valve leakage. As a result, we concluded with the help of coupled fluent-structural analysis that the pipe with less turbulence has less chance of failure there by requiring less maintenance.

Keywords: Von Mises stress, thermal stratification, turbulent penetration, coupled fluent-structural analysis, Reactor coolant system

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[1] Klein, Dale E., and Dear Chairman Klein. "Subject: summary report-5491H meeting of the advisory committee on reactor safeguards, February 7-9, 2008, and other related activities of the committee." (2008).
[2] Kim, J. H., R. M. Roidt, and A. F. Deardorff. "Thermal stratification and reactor piping integrity." Nuclear Engineering and Design 139.1 (1993): 83-95.
[3] Coatsworth, Andrew M. and Nuclear Installations Inspectorate. "IAEA Annual Technical Committee Meeting of the INES National Officers IAEA Vienna 22-24 October 1997." (1997).
[4] Shah, VikramNaginbhai, et al. "Assessment of field experience related to pressurized water reactor primary system leaks." ASME publications-pvp395 (1999): 23-32.
[5] Agbadua, Segun, Afokhainu, et al. "Thermal Cycling Effects on the Fatigue Behaviour of Low Carbon Steel." Journal of Minerals and Materials Characterization and Engineering 10 (2011): 1345.
[6] Kim, Sunhye, et al. "A coupled cfd-fem analysis on the safety injection piping subjected to thermal stratification." Nuclear Engineering and Technology 45.2 (2013): 237-248.
[7] Ashgriz, Nasser, and Javad Mostaghimi. "An introduction to Computational Fluid Dynamics." Fluid flow handbook. McGraw-Hill Professional (2002).
[8] Tannehill, J.C., Anderson, D.A., and Pletcher, R.H., “Computatioal Fluid Mechanics and Heat Transfer,” Taylor & Francis, 1997.
[9] Pletcher, Richard H., John C. Tannehill, and Dale Anderson. Computational fluid mechanics and heat transfer. CRC Press, 2012.
[10] Nichols, Robert H., Robert W. Tramel, and P. G. Buning. "Solver and turbulence model upgrades to OVERFLOW 2 for unsteady and high-speed applications." AIAA paper 2824 (2006): 2006
[11] S. Chattopadhyay, “Structural evaluation of a piping system subjected to thermal stratification,” Nucl. Eng. & Design, Vol. 239, pp. 2236-2241 (2009).
[12] Verification and validation of a thermal stratification experiment CFD simulation by Hugo C. Regende – nuclear engineering and design, 248 (2012), pp. 72-81.