Development of nuclear fuel assembly 3D reduced model and modal analysis

Subhan, Muhammad; Namgung, Ihn

doi:10.1016/j.anucene.2022.109561

Cited by 11 publications

(2 citation statements)

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“…A concern regarding the structural integrity of fuel assembly was discovered from the contact and impact between fuel assemblies (FAs) coming from torsional motion induced during operational states [1]. They designed lumped mass and beam elements to represent reactor structural dynamics due to its complexity.…”

Section: Introductionmentioning

confidence: 99%

“…Namgung ran a study on the interaction of a spacer grid with a fuel rod, using the finite element analysis (FEA) approach [1,3]. To counter the complexity of the model design, they conducted the analysis on a single cell of spacer grid combined with a fuel rod, with the thermal loads obtained from a thermal analysis of 2D axisymmetric simulation of the fuel rod, fill gas, and fuel pellet.…”

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: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%