Relevant bibliographies by topics / Fuel assembly vibrations

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Fuel assembly vibrations'

Author: Grafiati
Published: 4 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "Fuel assembly vibrations"

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Perevezentsev, V. "FEATURES OF THE FORMATION OF HYDRODYNAMIC LOADS ON THE FUEL RODS DEPENDING ON THE STRUCTURE OF THE COOLANT FLOW AT THE ENTRANCE TO THE FUEL ASSEMBLY WWER." PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. SERIES: NUCLEAR AND REACTOR CONSTANTS 2021, no. 3 (2021): 136–42. http://dx.doi.org/10.55176/2414-1038-2021-3-136-142.

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Experimental studies of hydrodynamic induced of fuel rods vibrations WWER-440 tweers using a full-scale mock-up with lead imitators of fuel tablets have been carried out. It is shown that the speed of the turbulent flow in the fuel rods beam cannot be the only hydrodynamic characteristic that determines the vibrational characteristics of the fuel rods beams. The presence of indignant flow of various elements of the tract of the coolant to the fuel rods beams inlet significantly affects the intensity of their vibrations. An energy model of the balance of pulsating energy of turbulent flow and e
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Verma, V., D. Chionis, A. Dokhane, and H. Ferroukhi. "MODELLING AND ANALYSIS OF FUEL ASSEMBLY VIBRATIONAL MODES IN PWRS USING SIMULATE-3K." EPJ Web of Conferences 247 (2021): 21008. http://dx.doi.org/10.1051/epjconf/202124721008.

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Some of the KWU pre-KONVOI PWRs operating across Europe saw a systematic increase in the neutron noise levels over several cycles in the last decade, and subsequently, core internals’ movements, especially vibrations of fuel assemblies with specific designs were identified as one of the plausible causes. Therefore, it is important to develop computational methods that can allow to investigate and predict the reactor noise response to fuel assemblies vibrations. To this aim, the 3D nodal reactor dynamics code SIMULATE-3K is used at PSI with a special module called the ‘assembly vibration model’
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Viebach, M., C. Lange, M. Seidl, Y. Bilodid, and A. Hurtado. "NEUTRON NOISE PATTERNS FROM COUPLED FUEL-ASSEMBLY VIBRATIONS." EPJ Web of Conferences 247 (2021): 02015. http://dx.doi.org/10.1051/epjconf/202124702015.

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The neutron flux fluctuation magnitude of KWU-built PWRs shows a hitherto unexplained correlation with the types of loaded fuel assemblies. Also, certain measured long-range neutron flux fluctuation patterns in neighboring core quadrants still lack a closed understanding of their origin. The explanation of these phenomena has recently revived a new interest in neutron noise research. The contribution at hand investigates the idea that a synchronized coolant-driven vibration of major parts of the fuel-assembly ensemble leads to these phenomena. Starting with an assumed mode of such collective v
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Carpenter, Chris. "Bottomhole-Assembly Dynamics Software Helps Mitigate Twistoffs While Drilling." Journal of Petroleum Technology 74, no. 12 (2022): 72–74. http://dx.doi.org/10.2118/1222-0072-jpt.

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_ This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 202174, “Mitigating Twistoffs While Drilling With the Help of Bottomhole-Assembly Dynamics Software,” by Mario A. Rivas, SPE, Andres A. Ramirez, and Bader S. Al‑Zahrani, SPE, Saudi Aramco, et al. The paper has not been peer reviewed. _ A major challenge during drilling operations is the occurrence of twistoffs on bottomhole assembly (BHA) components. To overcome this challenge, a study was performed of twistoffs experienced on BHA components. Based on the findings, drilling operations and recomme
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Dyk, Štěpán, and Vladimír Zeman. "Impact vibrations of guide thimbles in nuclear fuel assembly." Archive of Applied Mechanics 87, no. 2 (2016): 231–44. http://dx.doi.org/10.1007/s00419-016-1189-6.

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Kalinina, Elena, Doug Ammerman, Carissa Grey, Gregg Flores, Sylvia Saltzstein, and Nicholas Klymyshyn. "Full-Scale Assembly 30 cm Drop Test." MRS Advances 5, no. 5-6 (2019): 265–74. http://dx.doi.org/10.1557/adv.2019.477.

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ABSTRACTCan Spent Nuclear Fuel withstand the shocks and vibrations experienced during normal conditions of transport? This question was the motivation for the multi-modal transportation test (MMTT) (Summer 2017), 1/3-scale cask 30 cm drop test (December 2018), and full-scale assembly 30 cm drop tests (June 2019). The full-scale ENSA ENUN 32P cask with 3 surrogate 17x17 PWR assemblies was used in the MMTT. The 1/3-scale cask was a mockup of this cask. The 30 cm drop tests provided the accelerations on the 1/3-scale dummy assemblies. These data were used to design full-scale assembly drop tests
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Zoia, Andrea, Amélie Rouchon, Baptiste Gasse, Christophe Demazière, and Paolo Vinai. "Analysis of the neutron noise induced by fuel assembly vibrations." Annals of Nuclear Energy 154 (May 2021): 108061. http://dx.doi.org/10.1016/j.anucene.2020.108061.

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Vidal-Ferràndiz, A., A. Carreño, D. Ginestar, C. Demazière, and G. Verdú. "Neutronic Simulation of Fuel Assembly Vibrations in a Nuclear Reactor." Nuclear Science and Engineering 194, no. 11 (2020): 1067–78. http://dx.doi.org/10.1080/00295639.2020.1756617.

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Yong, Han, Huang Shiyong, Han MengXuan, et al. "The Experimental Validation of a Digital Filter Mathematical Modelling for Nuclear Fuel Vibration Monitoring System." Journal of Function Spaces 2022 (June 4, 2022): 1–11. http://dx.doi.org/10.1155/2022/9741419.

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Aiming at vehicles will produce shocks and vibrations for various reasons in the process of transportation and handling, any shock and vibration that exceeds the regulations would cause damage to the nuclear fuel being transported. In order to monitor and analyze the shock and vibration data scientifically, a monitoring system based on MEMS acceleration sensor technology is developed to measure shocks and vibrations. The measured result involves some noise caused by the sensitivity of the sensor and the electrical noise, and a digital filter mathematical modelling is introduced to reduce noise
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Yao, Junqi, Yan Yin, Fan Zhang, Zhikun Qin, and Ting Guo. "Numerical simulation of the effect of fixation type on random vibration of fuel cell stacks in various vehicles." Journal of Physics: Conference Series 2903, no. 1 (2024): 012026. https://doi.org/10.1088/1742-6596/2903/1/012026.

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Abstract During vehicle operation, the fuel cell stack onboard inevitably experiences vibration loads due to uneven road surfaces and internal system vibrations. Therefore, this paper conducts a mechanical response analysis of metal plate fuel cell stacks under random vibration loads for various vehicles (passenger vehicles, buses, trailers, and logistics vehicles) and different fixation types (fixing with 14 bolts, fixing with four corner bolts, fixing blind end plates, fixing short sides of both end plates, fixing long sides of both end plates). The stress distribution of the membrane electr
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Dissertations / Theses on the topic "Fuel assembly vibrations"

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Longo, Lorenzo. "Experimental characterization of PWR fuel assemblies mechanical behavior under hydrodynamic and seismic-like loads." Electronic Thesis or Diss., Ecole centrale de Marseille, 2023. http://www.theses.fr/2023ECDM0002.

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Les assemblages de combustible nucléaire dans le cœur d’un réacteur à eau pressurisée(REP) sont immergés dans un écoulement axial. Cet écoulement exerce une charge hydrodynamique sur les assemblages et est responsable de leur couplage et de leurs vibrations. De plus, lors d’un tremblement de terre ou d’un événement LOCA (Loss Of CoolantAccident), les assemblages de combustible sont soumis à de fortes oscillations. La charge hydrodynamique peut déformer les assemblages, générant une déformation arquée, tandis que des oscillations plus fortes, comme lors d’un événement sismique,peuvent être à l
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Rolland, Romain. "Caractérisation de l'interaction fluide-structure d'un assemblage de coeur de réacteur sous forçage sismique." Electronic Thesis or Diss., Institut polytechnique de Paris, 2022. http://www.theses.fr/2022IPPAE005.

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Dans le cadre des études de sûreté, il est nécessaire de disposer de modèles validés des forces fluides s’exerçant sur des assemblages combustibles en cas de séisme. Dans la technologie REP (réacteur à eau pressurisée) utilisée en France, les assemblages sont constitués de faisceaux de crayons cylindriques disposés en réseau carré et soumis à un écoulement axial. En cas de séisme, ces assemblages sont soumis à des oscillations latérales. Ces vibrations peuvent mener à la déformation des assemblages. Des campagnes d’essais sur assemblage combustible réel ont été réalisées et ont mis en évidence
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Book chapters on the topic "Fuel assembly vibrations"

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Chen, Ting, Jie Pan, Xiao Zhang, Dong Guan, and Zhen Chen. "Structural Stability Analysis of a High Power PEMFC Stack." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-1876-4_61.

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AbstractAn automobile fuel cell stack mounted horizontally will be subjected to a large impact in the direction parallel with the cells. This may cause interfacial slippage between cells, showing a downward bowing phenomenon, which may cause decay in the performance, and even stack leakage. Therefore, ensuring structural and mechanical integrity is very important in stack assembly design, especially for high power stacks with hundreds of unicells. In this paper, the authors presented numeric analysis for a 300 kW stack with 550 unicells, and analyzed the local vibration from the stack global m
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Lee, Kang-Hee, Chang-Hwan Shin, Heung-Seok Kang, Dong-Seok Oh, and Nam-Kyu Park. "Operating Vibration Measurements of Test Fuel Assembly in Reactor Thermo-hydraulic Test Condition." In Conference Proceedings of the Society for Experimental Mechanics Series. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-9299-4_4.

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Goody, R. M., and Y. L. Yung. "Vibration-Rotation Spectra of Gaseous Molecules." In Atmospheric Radiation. Oxford University Press, 1989. http://dx.doi.org/10.1093/oso/9780195051346.003.0005.

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In this chapter we discuss the characteristics of absorption by gaseous constituents of the earth’s atmosphere. This is a complex topic and atmospheric investigators may be disturbed by the idea that weather and climate might be affected by details of the kind we shall discuss. But, as yet, we lack criteria as to what is important and what is not, leaving little alternative to developing a general understanding of the field. A full description of the atmospheric absorption spectrum involves the intensities, state dependence, and detailed line profiles of 105 to 106 lines of 20 or more differen
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Conference papers on the topic "Fuel assembly vibrations"

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Demazière, C., A. Rouchon, and A. Zoia. "Understanding the Neutron Noise Induced by Fuel Assembly Vibrations in Linear Theory." In Mathematics and Computation 2021. American Nuclear Society, 2021. https://doi.org/10.13182/xyz-33619.

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Hussein, Salma, Paolo Vinai, and Christophe Demaziere. "On Reactor Neutron Noise Induced by Fuel Assembly Vibrations in Large and Small Heterogeneous Water-Cooled Cores." In International Conference on Physics of Reactors (PHYSOR 2024). American Nuclear Society, 2024. http://dx.doi.org/10.13182/physor24-43664.

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Demaziere, C. "On the Modelling of Fuel Assembly Vibrations Using Coarse Mesh Approaches." In International Conference on Physics of Reactors 2022. American Nuclear Society, 2022. http://dx.doi.org/10.13182/physor22-37264.

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Delannoy, Joachim, Marco Amabili, Brett Matthews, Brian Painter, and Kostas Karazis. "Identification of Non-Linear Damping of Nuclear Reactor Components in Case of One-to-One Internal Resonance." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66311.

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In Pressurized Water Reactors (PWR) assemblies are exposed to challenging thermal, mechanical, and irradiation loads during operation. Global core and local fuel assembly flow fields coupled with seismic excitation result in fuel assembly and fuel rod vibrations. The fact that vibrations may become excessive in certain conditions has consequences on operational safety margins in fuel assemblies designs. In order to understand how the fuel assembly responds dynamically to an external excitation, it is important to identify the main characteristics of the structures. Among them, the fuel assembl
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Du, Zhuoqi, Marcus Seidl, and Rafael Macián-Juan. "Development of a Multiphysics Approach With ANSYS CFX and PARCS for Local Analysis of Neutron Oscillation." In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-67061.

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Neutron noise analysis has been done over the decades to predict fuel assembly vibrations and to evaluate safety related issues. Neutron noise occurs due to several reasons: the vibration of the fuel rods, flow obstacles such as rod bending and crud deposition, the moderator temperature and time dependent changes caused by varying flow distributions within a fuel assembly, etc. In order to have a better insight of the neutron noise, a fluid mechanics, structural and neutronics coupled code is developed to perform detailed multiphysics simulations at the level of the fuel rods inside a fuel ass
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Benhamadouche, S., P. Moussou, and C. Le Maitre. "CFD Estimation of the Flow-Induced Vibrations of a Fuel Rod Downstream a Mixing Grid." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-78054.

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Turbulent-induced vibrations of fuel assemblies in PWR power plants is a potential cause of deformation and of fretting wear damage. Because of the complexity of a 17 × 17 rod assembly with a length exceeding four meters, the prediction of its vibrations is still a challenging task as regards computer simulation. The Large Eddy Simulation (LES) technique provides the instantaneous pressure and velocity fields inside the fluid as well as the shear stress and the pressure along the walls. EDF inhouse open source CFD tool Code_Saturne is used in the present work with a 8 million cells grid to com
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De Pauw, B., T. Geernaert, F. Berghmans, G. Kennedy, and K. Van Tichelen. "Instrumentation of a Lead-Bismuth Eutectic Cooled Nuclear Fuel Assembly Using Fibre Bragg Gratings for Characterizing the Flow-Induced Vibrations." In Bragg Gratings, Photosensitivity and Poling in Glass Waveguides and Materials. OSA, 2018. http://dx.doi.org/10.1364/bgppm.2018.bm3a.3.

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Delafontaine, Serge, Guillaume Ricciardi, and Bruno Collard. "LES CFD Simulation of Unsteady Fluid Forces in Tube Bundle." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57075.

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Significant nuclear fuel assembly design innovations are regularly incorporated to meet the highest expectations in terms of safety, performance and flexibility. Despite the continuous upgrades of fuel designs and materials, the fuel failure rate has not markedly decreased during the last decade, partly because of higher burn-up, longer cycle lengths, mixed cores… Safety aspects give rise to the reduction of contamination and the fuel cladding represents the first containment barrier. It is then necessary to maintain its integrity under all operating conditions. Flow-induced vibrations of fuel
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Amabili, Marco, Prabakaran Balasubramanian, Giovanni Ferrari, et al. "Experiments on Nonlinear Vibrations of a Nuclear Fuel Rod Supported by Spacer Grids in Air and Submerged in Water." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10663.

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Abstract For safety reasons, the nuclear fuel assemblies of Pressurized Water Reactors (PWR) must be able to withstand external excitations ranging from large amplitude seismic motions of the reactor to flow-induced vibrations from the surrounding coolant water. A nuclear fuel assembly is composed of long slender tubes, most of them filled with uranium pellets, maintained in a square array by spacer grids. The spacer grids provide a nonlinear flexible boundary condition with friction and micro-impacts that complicates the nonlinear dynamics. In order to improve safety margins in the design of
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Vivaldi, Daniele, and Roxan Pulicani. "Fluid-Structure Interaction Simulations of a Rod Subjected to a Water Axial Flow in a Nuclear Core Relevant Configuration." In ASME 2023 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/pvp2023-105808.

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Abstract Forces exerted by the water coolant flow in nuclear reactor cores result in fuel rod and fuel assembly vibrations. The consistent prediction of such turbulence-induced forces by CFD simulations requires turbulence scale-resolving approaches with highly refined grid sizes. With the goal of assessing the capabilities of CFD simulations to predict fluid-induced vibrations in such configurations, this paper presents fluid-structure coupled simulations of an experimental campaign of a single vertical rod subjected to an axial water flow. The rod is cantilever, the water flow impacts the ro
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