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Effect of Spacer Grids on the Local Heat Transfer

2010 14th International Heat Transfer Conference, Volume 4, 2010
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 transfer.
Benediktas Cesna, Eugenijus Uspuras
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CFD Application to Advanced Design for High Efficiency Spacer Grid

Nuclear Engineering and Design, 2014
Abstract Pressurized water reactor (PWR) fuels have been developed to meet the needs of the market. A spacer grid is a key component to improve thermal hydraulic performance of a PWR fuel assembly. Mixing structures (vanes) of a spacer grid promote coolant mixing and enhance heat removal from fuel rods.
Kazuo Ikeda
exaly   +2 more sources

Optimization of the Atucha-II fuel assembly spacer grids

, 2012
The presentation is entitled optimisation of the Atucha-II fuel assembly spacer grids. This work deals with a demonstrative application of Computational Fluid Dynamics (CFD) for design optimisation .A commercial CFD code was applied to simulate the flow within Atucha-II reactor coolant channels and to assess the resulting pressure losses.
Melideo, D., Moretti, F., Terzuoli, F., D'AURIA, FRANCESCO SAVERIO, Mazzantini, O.   +4 more
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Mathematical Models of Spacer Grids

Volume 3: Thermal-Hydraulics, 2016
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 the pressure loss in the reactor core, spacer grids have several benefits in Light Water Reactors (LWRs).
Alan B. Maskal, Fatih Aydogan
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Development of a New Spacer Grid Form to Enhance the Integrity of Fuel Rod Support and the Crush Strength of a Spacer Grid Assembly

Volume 2: Structural Integrity; Safety and Security; Advanced Applications of Nuclear Technology; Balance of Plant for Nuclear Applications, 2009
A spacer grid is one of the most important structural components in a LWR fuel assembly. The spacer grid, which supports nuclear fuel rods laterally and vertically with a friction grip, is an interconnected array of slotted grid straps welded at the intersections to form an egg-crate structure.
Kee-nam Song, Soo-bum Lee, Moon-Kyun Shin, Jae-Jun Lee, Gyung-Jin Park   +4 more
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Design of a Spacer Grid Using Axiomatic Design

10th International Conference on Nuclear Engineering, Volume 1, 2002
Recently, much attention has been focused on the design of the fuel assemblies in the Pressurized Light Water Reactor (PLWR). The spacer grid is one of the main structural components in a fuel assembly. It supports fuel rods, guides cooling water, and maintains geometry from the external impact loads. In this research, a new shape of the spacer grid is
K. N. Song, B. S. Kang, K. H. Yoon, S. K. Choi, G. J. Park   +4 more
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Design of a Spacer Grid Using Axiomatic Design

Journal of Nuclear Science and Technology, 2003
Recently, much attention is focused on the design of fuel assemblies in the Pressurized Light Water Reactor (PWR). The spacer grid is one of the main structural components in a fuel assembly. It supports fuel rods, guides cooling water, and maintains geometry from external impact loads.
Ki-Jong PARK, Byung-Soo KANG, Kee-Nam SONG, Gyung-Jin PARK   +3 more
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Vibration of the Package of Rods Linked by Spacer Grids

2011
This paper deals with modelling and vibration analysis of the large package of identical parallel rods which are linked by transverse springs (spacer grids) placed on several level spacings. The vibration of rods is caused by the support plate motion. The rod discretization by FEM is based on Rayleigh beam theory.
V. Zeman, Z. Hlaváč
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Study on the Lateral Velocity and Vortex in a Spacer Grid

Nuclear Technology, 2018
AbstractThe spacer grid is one of the most important parts of a fuel assembly for enhancing thermal-hydraulic performance. The mixing vane is a critical component of the spacer grid (or mixing vane grid) to produce lateral flow, turbulence, vortex, and other mixing mechanisms downstream of the grid.
Bin Han, Bao-Wen Yang, Cen Wei, Yudong Zha   +3 more
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Numerical study on the effect of grid mixing span in 2 × 1 spacer grid

Nuclear Engineering and Design, 2018
Abstract Spacer grid or Mixing Vane Grid (MVG) is recognized as an important component that could greatly improve Critical Heat Flux (CHF) performance in the fuel assembly. The temperature around the rod would be more uniform, bubbles around the rod wall would be broken off or driven to the center of the subchannel by the mixing effects produced by ...
Bin Han, Bao-Wen Yang, Yudong Zha
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