The Relationship between a Wear Depth :and a Decrease of the Contacting Force in the Nuclear Fuel Fretting

핵연료봉 프레팅마멸에서 마멸깊이와 접촉하중 감소사이의 관계

  • Published : 2006.02.01


Sliding wear tests have been performed to evaluate the effect of normal load decrease on the wear depth of nuclear fuel rods in room temperature air. The objectives of this study are to quantitatively evaluate the supporting ability of spacer grid springs, to estimate the wear depth by using the contacting force decrease and to compare the wear behavior with increasing test cycles (up to $10^7$) at each spring condition. The result showed that the contacting load decrease depends on the spring shape and the applied slip amplitude. The estimated wear depth is smaller when compared with measured wear depth. Based on the test results, the wear mechanism, the role of wear debris layer and the spring shape effect were discussed.


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