Sloshing impact in roofed tanks

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Description

A large number of high-level waste (HLW) storage tanks exists in various tank farms. Seismic activities at those locations may cause significant sloshing in HLW tanks. These tanks are covered to avoid any spilling during large amplitude earthquakes. However, large amplitude sloshing may result in impact on the cover or the roof of the tank. Hence, a better understanding of the impact phenomenon is necessary to assess the safety of the tanks currently in existence, and to establish design guidelines for future designs. A pressure based formulation is derived to model sloshing impact in roared tanks. It is incorporated into ... continued below

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8 p.

Creation Information

Uras, R.A. July 1, 1995.

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Description

A large number of high-level waste (HLW) storage tanks exists in various tank farms. Seismic activities at those locations may cause significant sloshing in HLW tanks. These tanks are covered to avoid any spilling during large amplitude earthquakes. However, large amplitude sloshing may result in impact on the cover or the roof of the tank. Hence, a better understanding of the impact phenomenon is necessary to assess the safety of the tanks currently in existence, and to establish design guidelines for future designs. A pressure based formulation is derived to model sloshing impact in roared tanks. It is incorporated into Argonne`s in-house finite element code FLUSTR-ANL. A numerical test case with a harmonic input excitation is studied. The simulation results indicate that linear behavior is preserved beyond the first impact, and some mesh distortion is observed following a stronger second impact. During the impact, the displacement of the contacting surface nodes remains constant, and the velocities are reduced to zero. An identification of impacting nodes is possible from the dynamic pressures induced in surface elements.

Physical Description

8 p.

Notes

INIS; OSTI as DE95014219

Source

  • Joint American Society of Mechanical Engineers (ASME)/Japan Society of Mechanical Engineers (JSME) pressure vessels and piping conference, Honolulu, HI (United States), 23-27 Jul 1995

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  • Other: DE95014219
  • Report No.: ANL/RE/CP--85952
  • Report No.: CONF-950740--64
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 79732
  • Archival Resource Key: ark:/67531/metadc741284

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  • July 1, 1995

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • Dec. 11, 2015, 6:25 p.m.

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Uras, R.A. Sloshing impact in roofed tanks, article, July 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc741284/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.