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Impact Analysis and Test on the Spacer Grid Assembly for PWRs
Key Engineering Materials, 2005A spacer grid assembly is one of the main structural components of the fuel assemblies of Pressurized light Water Reactors. The spacer grid assembly is structurally required to have enough buckling strength under various kinds of lateral loads acting on the fuel assembly so as to keep the fuel assembly straight. The structural performance of the spacer
Kee Nam Song +3 more
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Local heat transfer coefficient near the spacer grids
Kerntechnik, 2011Abstract The paper presents the experimental data of the local heat transfer in the fuel rod assembly with honeycomb type spacer grids. It was established experimentally that the separation of the boundary layer behind the spacer grid increases the interchannel coefficient of transverse mixing of flow, and therefore, the local heat ...
B. Cesna, M. Valincius
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Analysis on the Dynamic Buckling Behavior of the Spacer Grid Structure
Volume 3: Nuclear Fuel and Material, Reactor Physics, and Transport Theory, 2018The spacer grid is a key element of the fuel assembly used in the Pressurized water reactor. Due to its structural complexity, the analysis and the design of the spacer grid structure is difficult. This paper discusses the 5 × 5 cell size partial grid analysis including the detailed grid structural elements, through which, the impact force, the rebound
Yan Guo +3 more
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Spacer Grid Assembly with Sliding Fuel Rod Support
Transactions of the Korean Society of Mechanical Engineers A, 2010A spacer grid assembly is one of the most important structural components of the nuclear fuel assembly of a Pressurized Water Reactor (PWR). A primary design requirement is that the fuel rod integrity be maintained by the spacer grid assembly during the operation of the reactor.
Kee-Nam Song, Sang-Hoon Lee
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Impact Analysis and Test of the Spacer Grid Assembly for PWRs
Key Engineering Materials, 2006The spacer grid assembly, which is an interconnected array of slotted grid straps and welded at the intersections to form an egg crate structure, is one of the main structural components of the nuclear fuel assembly of a Pressurized light Water Reactor (PWR).
Kee Nam Song +3 more
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Mathematical spacer grid models for single phase flow
Annals of Nuclear Energy, 2017Abstract The fuel rods in pressurized water reactor (PWR) and boiling water reactor (BWR) cores are supported by spacer grids. Even though spacer grids add to pressure loss in the reactor core, spacer grids have several benefits in light water reactors (LWRs). Some of these benefits are: (i) increasing turbulence at the bottom of the reactor core for
Alan B. Maskal, Fatih Aydogan
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Experimental Turbulence Analysis of Fuel Bundle With Spacer Grids
18th International Conference on Nuclear Engineering: Volume 2, 2010Rod bundles are widely used in industry today with applications ranging from nuclear reactors, heat exchangers, and steam generators. Accurately modeling the inherently unsteady and turbulent flow within these rods is essential in order to design for optimal efficiency while controlling vibration, noise and heat transfer.
Elvis Dominguez-Ontiveros +2 more
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Mathematical spacer grid models for two phase flow
Annals of Nuclear Energy, 2017Abstract The fuel rods of nuclear power plants covering Pressurized Water Reactor (PWR) and Boiling Water Reactor (BWR) cores are supported by spacer grids. Even though spacer grids add to the pressure loss in the reactor core, spacer grids have several benefits in LWRs.
Alan B. Maskal, Fatih Aydogan
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Turbulent Flow Through Spacer Grids in Rod Bundles
Journal of Fluids Engineering, 1998The effects of the spacer grids with mixing vanes in rod bundles on the turbulent structure were investigated experimentally. The detailed hydraulic characteristics in subchannels of a 5 × 5 rod bundle with mixing spacer grids were measured upstream and downstream of the spacer grid by using a one component LDV (Laser Doppler Velocimetry).
Sun Kyu Yang, Moon Ki Chung
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Nonlinear vibrations of a nuclear fuel rod supported by spacer grids
Nuclear Engineering and Design, 2020Abstract The internal components of Pressurized Water Reactors (PWRs), particularly nuclear fuel assemblies, must be able to withstand Flow Induced Vibrations (FIVs) during operating conditions and during extreme accident conditions, such as earthquakes.
Giovanni Ferrari +6 more
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