Abstract
Turbulent penetration and unsteady thermal stratification can occur when hot/cold fluids mix and valve leakage in some elbow pipe regions in the nuclear power plant. Temperature fluctuations with large amplitude and high frequency caused by the unstable thermal stratification can lead to time-varying thermal stress and even induce thermal fatigue. Monitoring of wall temperature fluctuations of elbow pipes has received considerable interest because the thermal fatigue failure of these pipes could present severe environmental implications and large economic losses. In this study, based on the energy conservation law and the turbulent permeation laws, the linear interpolation method is used in this paper to calculate temperature distributions in the fatigue-sensitive region. The FLUENT software is used to verify algorithm effectiveness and accuracy, which provides a new solution for indirect measurement of internal temperature of the elbow pipe.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Tokuhiro, A., Kimura, N.: An experimental investigation on thermal striping mixing phenomena of a vertical non-buoyant jet with two adjacent buoyant jets as measured by ultrasound Doppler velocimetry. Nucl. Eng. Des. 188(1), 49–73 (1999)
Metzner, K.J., Wilke, U.: European THERFAT project—thermal fatigue evaluation of piping system “Tee”-connections. Nucl. Eng. Des. 235(2–4), 473–484 (2005)
Guo, Zhouchao, Zou, Jinqiang, et al.: Monitoring of wall temperature fluctuations for thermal fatigue in a horizontal mixing T-junction pipe. Prog. Nucl. Energy 104, 298–305 (2018)
Bieder, U., Errante, P.: Numerical analysis of two experiments related to thermal fatigue. Nucl. Eng. Technol. 49(1), 675–691 (2017)
Shams, A., Edh, N., et al.: Synthesis of a CFD benchmarking exercise for a T-junction with wall. Nucl. Eng. Des. 330(1), 58–67 (2018)
Kamide, H., Igarashi, M., Kawashima, S., et al.: Study on mixing behavior in a tee piping and numerical analyses for evaluation of thermal striping. Nucl. Eng. Des. 239(1), 58–67 (2009)
Walker, C., Simiano, M., Zboray, R., et al.: Investigations on mixing phenomena in single-phase flow in a T-junction geometry. Nucl. Eng. Des. 239(1), 116–126 (2009)
Lee, J.I., Hu, L.W., Saha, P., et al.: Numerical analysis of thermal striping induced high cycle thermal fatigue in a mixing tee. Nucl. Eng. Des. 239(5), 833–839 (2009)
Oumaya, T., Nakamura, A.: Thermal stress evaluation of a closed branch pipe connected to reactor coolant loop. In: 14th International Conference on Nuclear Engineering, Florida, pp. 279–287. ASME press, USA (2006)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Ling, J., Fu, H., Liu, HT., Yuan, JQ. (2020). Monitoring and Analyzing of Wall Temperature Fluctuations for Thermal Fatigue in Elbow Pipe. In: Xu, Y., Sun, Y., Liu, Y., Wang, Y., Gu, P., Liu, Z. (eds) Nuclear Power Plants: Innovative Technologies for Instrumentation and Control Systems. SICPNPP 2019. Lecture Notes in Electrical Engineering, vol 595. Springer, Singapore. https://doi.org/10.1007/978-981-15-1876-8_8
Download citation
DOI: https://doi.org/10.1007/978-981-15-1876-8_8
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-15-1875-1
Online ISBN: 978-981-15-1876-8
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)