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Online Measurement of Fuel Stack Elongation

Authors: Sung Ho Ahn, Jintae Hong, Chang Young Joung, Tae Ho Yang, Sung Ho Heo, Seo Yun Jang


The performances of nuclear fuels and materials are qualified at an irradiation system in research reactors operating under the commercial nuclear power plant conditions. Fuel centerline temperature, coolant temperature, neutron flux, deformations of fuel stack and swelling are important parameters needed to analyze the nuclear fuel performances. The dimensional stability of nuclear fuels is a key parameter measuring the fuel densification and swelling. In this study, the fuel stack elongation is measured using a LVDT. A mockup LVDT instrumented fuel rod is developed. The performances of mockup LVDT instrumented fuel rod is evaluated by experiments.

Keywords: axial deformation, elongation measurement, in-pile instrumentation, LVDT

Digital Object Identifier (DOI):

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[1] S. Solstad, and R. V. Nieuwenhove, “Instrumentation capabilities and developments at the Halden Reactor Project,” Proc. 6th Int. Topl. Mtg. Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technologies, Knoxville, Tennessee, April, 2009.
[2] J. Rempe, D. Knudson, J. Daw. T. Unruh, B. Chase, K. Davis, R. schley, and S. Taylor, “New sensors for irradiation testing at materials and test reactors,” IAEA Technical Meeting on In-Pile Testing and Instrumentation for Development of Generation IV Fuels and Materials, Norway, August, 2012.
[3] D. L. Knudson, J. L. Rempe, “Linear variable differential transformer (LVDT) based on elongation measurements in advanced test reactor high temperature irradiation testing,” Meas. Sci. Technol., Vol 23, No. 2, February 2012.
[4] A. Shaimerdenov, An Benisebaev, S. Gizatulin, P. Chakrov, M. Tanimoto, N. Kimura, K. Tsuchiya, and H. Kawamura, “Irradiation trst of linear variable differential transformers in the WWR-K core,” IAEA Technical Meeting on In-Pile Testing and Instrumentation for Development of Generation IV Fuels and Materials, Norway, August, 2012.
[5] L. Ruifeng, L. Xiaoping, S. Maliang, J. Hong, X. Hao, and Z. Shouowen, “Research on high pressure resistant linear variable differential transformer with magnetic ring,” Int. Conf. on Chemical, material and Food Engineering, 2015, pp. 788-792.
[6] Z. Wang, Z. Duan, “The research of LVDT nonlinearity data compensation based on RBF neural network,” Proc. of the World Congress on Intelligent Control and Automation, China, 2008, pp. 4591-4594.
[7] K. Ara, “A differential transformer with temperature and excitation independent output,” IEEE Trans. on Instrumentation and Measurement, Vol 21, No. 3, pp. 249-255, 1972.
[8] K. V. Santhosh, and B. K. Roy, “A smart displacement measuring technique using linear variable displacement transducer,” Procedia Technology, Vol. 4, pp. 854-861, 2012.
[9] National Instruments, “Measuring positioning and displacement with LDVTs,”, March 16, 2016.
[10] Macro Sensors, “LVDT basics,” tttp://,” April 14, 2014.