Graduate Thesis Or Dissertation
 

Vibration Analysis of Advanced Test Reactor Miniplate Hydraulic Test in the OSU HMFTF

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/hm50tv56f

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  • Current research on the topic of advanced reactor fuel types include the use of ultrahigh density Uranium-Molybdenum fuels, towards their use in high-performance research reactors. These reactors operate with high power densities, and the increased cooling requirements therefore place high relevance on the fluid-structure interaction with these fuel elements; therefore it is necessary to extensively test their hydraulic characteristics prior to in-pile irradiation. The purpose of this research is to develop and execute a method by which accelerometers may be used to identify vibration characteristics of prototypic fuel elements during flow testing performed on the hydro-mechanical fuel test facility (HMFTF) at Oregon State University (OSU). The specific test under consideration for this study is the mini-plate 1 large-B (MP-1 LB) experiment for use in the Idaho National Laboratory’s (INL’s) Advanced Test Reactor (ATR), although numerous other tests on various fuel geometries could employ the same analysis process detailed within this study. The work herein describes the background of this project and of the experiment performed. A selection process of digital filtering and numerical methods is applied to develop a credible scheme for calculating displacement values over a range of flow rates. A semi-analytical model is developed for an idealized system in terms of the classical shell equations and compared against experimental frequency spectra. Finally vibration modes of the system are identified in terms of their significance and displacement traces are shown at each respective flow rate during testing.
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