Finite element analysis of the mechanical behavior of a nuclear fuel assembly spacer grid

Yoo, Youngik; Kim, Kyoung-Hong; Eom, Kyongbo; Lee, Seongki

doi:10.1016/j.nucengdes.2019.110179

Cited by 9 publications

(3 citation statements)

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“…They carried out fuel-improvement research, including mechanical integrity, core neutronics, and thermal hydraulics. One of these activities was presented by Yoo [5]. They developed an FEA of a spacer grid mechanical model and compared the results with those of matching static and dynamic tests [5].…”

Section: Zircaloy Materials Engineering Datamentioning

confidence: 99%

“…One of these activities was presented by Yoo [5]. They developed an FEA of a spacer grid mechanical model and compared the results with those of matching static and dynamic tests [5].…”

Section: Zircaloy Materials Engineering Datamentioning

confidence: 99%

“…A finite element model (FEM) of the spacer grid and an estimation of its buckling strength were carried out by Yoo et al [5]. They performed a spacer grid spring and dimple stiffness test and a fuel rod drag test, and then they conducted static compression and dynamic impact tests on the spacer grid.…”

Section: Introductionmentioning

confidence: 99%

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An Investigation of Structural Strength of Nuclear Fuel Spacer Grid

Adli,

Namgung

2024

Energies

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This paper compares and discusses the methods for evaluation of the structural integrity of the mid spacer grid of nuclear fuel assembly via a finite element analysis of 3D shell elements. The structural stiffness of the spacer grid is determined by applying either force or deformation as loads onto the spacer grid for both the square load and shear load directions. This study is an extension of a single-cell strength analysis of a spacer. External events such as seismic activities that might happen in a nuclear reactor are able to transfer loads onto nuclear components in random directions, which can be broken down into square and shear loadings. The structural strength indicated by the force reaction against the input displacement load was proven to be smaller such that the same displacement square load is around 260 times greater than the shear load. Due to the weakness in shear stiffness, the maintenance of a spacer grid structure is more vulnerable against out-of-plane loads. This indicates that the shear load needs to be considered in studies of fuel assembly integrity assessment for newly developing fuel design, as well as existing fuel assembly designs.

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Section: Zircaloy Materials Engineering Datamentioning

confidence: 99%

“…One of these activities was presented by Yoo [5]. They developed an FEA of a spacer grid mechanical model and compared the results with those of matching static and dynamic tests [5].…”

Section: Zircaloy Materials Engineering Datamentioning

confidence: 99%