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Journal ArticleDOI

Grid-to-rod flow-induced impact study for PWR fuel in reactor

TL;DR: In this article, the authors used finite element analysis (FEA) to evaluate the hydraulic flow-induced impact intensity between the fuel rods and the spacer grids for grid-to-rod fretting wear mitigation.
About: This article is published in Progress in Nuclear Energy.The article was published on 2016-08-01 and is currently open access. It has received 30 citations till now. The article focuses on the topics: Fretting & Nuclear reactor.
Citations
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Journal ArticleDOI
TL;DR: In this article, the research status of fretting damage in key equipment and structures of nuclear power plant is reviewed, and the authors have solved many problems, accumulated a lot of experience, and put forward many criteria.

78 citations

Journal ArticleDOI
TL;DR: In this article, the impact fretting wear behavior of thin-walled tubes under different support interfaces with a novel impact wear testing rig was investigated with a tube/cylindrical contact model and V-shaped fixtures with varied angles were applied.

35 citations

Journal ArticleDOI
Zupan Hu1
TL;DR: This paper briefly summaries the recent developments of grid-to-rod fretting (GTRF) wear analyses, as well as the remaining challenges.

25 citations

Journal ArticleDOI
15 Oct 2018-Wear
TL;DR: In this article, a unique autoclave fretting test rig was designed and fabricated to allow studying grid-to-rod fretting (GTRF) using actual cladding and grid materials.

23 citations

Journal ArticleDOI
TL;DR: Fretting wear tests of Zircaloy-4 alloy against Inconel 718 alloy were conducted on a fretting wear rig as discussed by the authors, where the contact state and fretting running characteristics were investigated.

21 citations

References
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Journal ArticleDOI
01 Jun 1970-Wear
TL;DR: In this article, the authors brought up-to-date the known facts concerning the mechanism of fretting wear in metals with special reference to the common engineering materials iron and steel under normal conditions.

204 citations

Journal ArticleDOI
TL;DR: A quantitative investigation of the fretting corrosion of mild-steel specimens is described in this paper, where measurements have been made of the frictional forces, the degree of damage and the variations in the electrical contact resistance for a wide range of applied loads, vibration amplitudes and number of cycles of motion.
Abstract: A quantitative investigation of the fretting corrosion of mild-steel specimens is described Measurements have been made of the frictional forces, the degree of damage and the variations in the electrical contact resistance for a wide range of applied loads, vibration amplitudes and number of cycles of motion In addition, the nature of the fretting corrosion scars and debris has been examined using optical and electron microscopy and electron diffraction The same sequence of phenomena is observed under all conditions, namely, (i) the formation of intermetallic welds, (ii) the production of black $\alpha $-Fe$\_{2}$O$\_{3}$ particles and ultimately (iii) the production of fine red-brown $\alpha $-Fe$\_{2}$O$\_{3}$ particles However, the magnitude of the frictional forces, the wear rates and the contact resistances are greatly dependent upon the amplitude of vibration At large amplitudes large intermetallic junctions form soon after the onset of motion and the friction rapidly rises above its initial value Subsequently the friction drops to a very low value, $\mu \sim $ 0$\cdot $05; this is due to the presence of loose oxidized debris which accumulates and tends to roll between the rubbing contacts At small amplitudes the scale of the welding is so reduced that no perceptible rise in friction occurs before the friction falls to its final low value Measurements of the depths of damage in the scars show that the holes which form arise from the original welding mechanism and that they subsequently disappear At large amplitudes the wear rates obey the same simple rules of wear as are obeyed in unidirectional motion, namely, the wear is proportional to the distance of sliding; the wear rate is proportional to the load and independent of the apparent area of contact Furthermore, there is close agreement in the magnitude of the wear rates in unidirectional motion and during fretting at large amplitudes At small amplitudes, however, much smaller rates of damage are obtained

90 citations

ReportDOI
18 Jul 2008
TL;DR: In this article, the authors presented a model that can calculate true stress, true strain, and the possible failure of the fuel rod cladding based on uniaxial test data.
Abstract: Pacific Northwest National Laboratory (PNNL) was tasked with incorporating cladding mechanical property data into the Nuclear Regulatory Commission (NRC) fuel codes, FRAPCON-31 and FRAPTRAN2, by the NRC Office of Nuclear Reactor Research. The objective of that task was to create a mechanical model that can calculate true stress, true strain, and the possible failure of the fuel rod cladding based on uniaxial test data.

43 citations

Journal ArticleDOI
TL;DR: It is generally agreed that lateral vibration of nuclear fuel elements is random in nature and is caused by random pressure fluctuations acting on the element surface as discussed by the authors, and a series of tests have been con...
Abstract: It is generally agreed that lateral vibration of reactor fuel elements is random in nature and is caused by random pressure fluctuations acting on the element surface.A series of tests has been con...

42 citations