Fretting Wear Damage of the Corroded Fuel Cladding Tubes for Nuclear Fuel Rod against Supporting Grids

Jin Seon  Kim; Yong Hwan Kim; Seung Jae Lee; Young Ze Lee

doi:10.4028/www.scientific.net/KEM.345-346.709

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 345-346Fretting Wear Damage of the Corroded Fuel Cladding...

Fretting Wear Damage of the Corroded Fuel Cladding Tubes for Nuclear Fuel Rod against Supporting Grids

Abstract:

Fuel cladding tubes in nuclear fuel assembly are held up by supporting grids because the tubes are long and slender. Fluid flows of high-pressure and high-temperature in the tubes cause oscillating motions between tubes and supports. This is called as FIV (flow induced vibration), which causes fretting wear in contact parts of tube-support. The fretting wear of tube-support can threaten the safety of nuclear power plant. Therefore, a research about the fretting wear characteristics of tube-support is required. The fretting wear tests were performed with supporting grids and cladding tubes, especially after corrosion treatment on tubes, in water. The tests were done using various applied loads with fixed amplitude. From the results of fretting tests, the wear amounts of tube materials can be predictable by obtaining the wear coefficient using the work rate model. Due to stick phenomena the wear depth was changed as increasing load and temperature. The maximum wear depth was decreased as increasing the water temperatures. At high temperatures there are the regions of some severe adhesion due to stick phenomena.

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Periodical:

Key Engineering Materials (Volumes 345-346)

Pages:

709-712

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.345-346.709

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Online since:

August 2007

Authors:

Jin Seon Kim, Yong Hwan Kim, Seung Jae Lee, Young Ze Lee

Keywords:

Corroded Fuel Cladding Tube, Fretting Wear, Supporting Grid, Wear

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