An investigation of the seismic response of a free-standing dry storage cask for spent fuel using the finite element method

Yung-Yen Ko, Hsuanchih Yang, Chin Cheng Huang

Research output: Contribution to journalReview article

3 Citations (Scopus)

Abstract

In most spent fuel dry storage facilities, the storage casks are free-standing on a concrete pad. This leads to seismic stability concerns for the casks, in terms of their sliding and rocking. In this study, the seismic behaviors of the free-standing vertical cylindrical cask (VCC), which is widely used in existing dry storage facilities, are investigated. The explicit finite element code LS-DYNA was adopted to establish a 3D model of a free-standing VCC on a concrete pad that considered the frictional contact at the interface between them. Analyses of the seismic responses of the cylindrical cask at various values of the friction coefficient were performed. From the results, a borderline value for the friction coefficient, which differentiates the motion type of the cask at the onset of motion between sliding and rocking, was deduced, and it can be related to the ratio of radius to height of the cask. Additionally, the unfavorable nutation motion of the VCC, which usually follows the rocking motion and causes considerable horizontal displacement, is discussed. It can be concluded that the displacement potential of the VCC can be decreased by setting an appropriate friction coefficient to prevent this rocking motion during earthquakes.

Original languageEnglish
Pages (from-to)33-43
Number of pages11
JournalNuclear Engineering and Design
Volume261
DOIs
Publication statusPublished - 2013 Apr 29

Fingerprint

spent fuels
Spent fuels
Seismic response
seismic response
finite element method
friction
Friction
barrels (containers)
Finite element method
sliding
coefficient of friction
Concretes
nutation
Earthquakes
earthquake
earthquakes
radii
causes

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Mechanical Engineering
  • Safety, Risk, Reliability and Quality
  • Materials Science(all)
  • Nuclear and High Energy Physics
  • Waste Management and Disposal

Cite this

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title = "An investigation of the seismic response of a free-standing dry storage cask for spent fuel using the finite element method",
abstract = "In most spent fuel dry storage facilities, the storage casks are free-standing on a concrete pad. This leads to seismic stability concerns for the casks, in terms of their sliding and rocking. In this study, the seismic behaviors of the free-standing vertical cylindrical cask (VCC), which is widely used in existing dry storage facilities, are investigated. The explicit finite element code LS-DYNA was adopted to establish a 3D model of a free-standing VCC on a concrete pad that considered the frictional contact at the interface between them. Analyses of the seismic responses of the cylindrical cask at various values of the friction coefficient were performed. From the results, a borderline value for the friction coefficient, which differentiates the motion type of the cask at the onset of motion between sliding and rocking, was deduced, and it can be related to the ratio of radius to height of the cask. Additionally, the unfavorable nutation motion of the VCC, which usually follows the rocking motion and causes considerable horizontal displacement, is discussed. It can be concluded that the displacement potential of the VCC can be decreased by setting an appropriate friction coefficient to prevent this rocking motion during earthquakes.",
author = "Yung-Yen Ko and Hsuanchih Yang and Huang, {Chin Cheng}",
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An investigation of the seismic response of a free-standing dry storage cask for spent fuel using the finite element method. / Ko, Yung-Yen; Yang, Hsuanchih; Huang, Chin Cheng.

In: Nuclear Engineering and Design, Vol. 261, 29.04.2013, p. 33-43.

Research output: Contribution to journalReview article

TY - JOUR

T1 - An investigation of the seismic response of a free-standing dry storage cask for spent fuel using the finite element method

AU - Ko, Yung-Yen

AU - Yang, Hsuanchih

AU - Huang, Chin Cheng

PY - 2013/4/29

Y1 - 2013/4/29

N2 - In most spent fuel dry storage facilities, the storage casks are free-standing on a concrete pad. This leads to seismic stability concerns for the casks, in terms of their sliding and rocking. In this study, the seismic behaviors of the free-standing vertical cylindrical cask (VCC), which is widely used in existing dry storage facilities, are investigated. The explicit finite element code LS-DYNA was adopted to establish a 3D model of a free-standing VCC on a concrete pad that considered the frictional contact at the interface between them. Analyses of the seismic responses of the cylindrical cask at various values of the friction coefficient were performed. From the results, a borderline value for the friction coefficient, which differentiates the motion type of the cask at the onset of motion between sliding and rocking, was deduced, and it can be related to the ratio of radius to height of the cask. Additionally, the unfavorable nutation motion of the VCC, which usually follows the rocking motion and causes considerable horizontal displacement, is discussed. It can be concluded that the displacement potential of the VCC can be decreased by setting an appropriate friction coefficient to prevent this rocking motion during earthquakes.

AB - In most spent fuel dry storage facilities, the storage casks are free-standing on a concrete pad. This leads to seismic stability concerns for the casks, in terms of their sliding and rocking. In this study, the seismic behaviors of the free-standing vertical cylindrical cask (VCC), which is widely used in existing dry storage facilities, are investigated. The explicit finite element code LS-DYNA was adopted to establish a 3D model of a free-standing VCC on a concrete pad that considered the frictional contact at the interface between them. Analyses of the seismic responses of the cylindrical cask at various values of the friction coefficient were performed. From the results, a borderline value for the friction coefficient, which differentiates the motion type of the cask at the onset of motion between sliding and rocking, was deduced, and it can be related to the ratio of radius to height of the cask. Additionally, the unfavorable nutation motion of the VCC, which usually follows the rocking motion and causes considerable horizontal displacement, is discussed. It can be concluded that the displacement potential of the VCC can be decreased by setting an appropriate friction coefficient to prevent this rocking motion during earthquakes.

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