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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 106
PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY
Edited by:
Paper 255

Strength Evaluation of Spacer Grid Assembly of Dual Cooled Fuel under Repeated Impact Loads

H.S. Lee1, Y.S. Lee1, H.L. Jin1, H.S. Kang2, J.Y. Kim2 and Y.H. Kang2

1Department of Mechanical Design Engineering, Chungnam National University, Daejeon, South Korea
2Korea Atomic Energy Research Institute, Daejeon, South Korea

Full Bibliographic Reference for this paper
H.S. Lee, Y.S. Lee, H.L. Jin, H.S. Kang, J.Y. Kim, Y.H. Kang, "Strength Evaluation of Spacer Grid Assembly of Dual Cooled Fuel under Repeated Impact Loads", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 255, 2014. doi:10.4203/ccp.106.255
Keywords: strength evaluation, impact analysis, 12 by 12 spacer grid assembly, dual cooled fuel, repeated impact load..

Summary
A spacer grid assembly is one of the most important structural components in a dual cooled fuel assembly. The dual cooled annular fuel assembly has a 12 by 12 spacer grid assembly. To prevent the fracture of the fuel rods, the spacer grid should be designed to endure lateral impact loads as a result of lateral seismic accelerations, shipping and handling load. An impact tests was performed by applying the various conditions such as impact speed and direction. However, the spacer grid is very expensive as a result of the high cost of material and welding. Therefore, to evaluate structural integrity of the 12 by 12 nuclear fuel assembly was performed by impact analysis using the ABAQUS-implicit code. In this analysis, the range of the impact velocity was 401 mm/sec to 481 mm/sec. The impact velocity-force curve was derived from the impact velocity and the maximum reaction force. The dynamic characteristic of the 12 by 12 spacer grid assembly was obtained from the dynamic behaviour.

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