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ANSYS finite element model of the Hanford domed shell in soil

Predictions for this model are shown in the next three slides.

Ken I. Johnson (1), John E. Delbier (1), Larry J. Julyk (2), Naveen K. Karri (1) and Siva P. Pilli (1)
(1) Pacific Northwest National Laboratory, Richland, Washington 99352
(2) M&D Professional Services, Inc., Richland, Washington 99352
“Limit load and buckling analysis for assessing Hanford single-shell tank dome structural integrity – 12278”, WM2012 Conference, February 26 – March 1, 2012, Phoenix, Arizona, USA

ABSTRACT: The U.S. Department of Energy, Office of River Protection has commissioned a structural analysis of record for the Hanford single shell tanks to assess their structural integrity. The analysis used finite element techniques to predict the tank response to the historical thermal and operating loads. The analysis also addressed the potential tank response to a postulated design basis earthquake. The combined response to static and seismic loads was then evaluated against the design requirements of American Concrete Institute standard, ACI-349-06, for nuclear safety-related concrete structures. Further analysis was conducted to estimate the plastic limit load and the elastic-plastic buckling capacity of the tanks. The limit load and buckling analyses
estimate the margin between the applied loads and the limiting load capacities of the tank structure. The potential for additional dome loads from waste retrieval equipment and the addition of large dome penetrations to accommodate retrieval equipment has generated additional interest in the limit load and buckling analyses. This paper summarizes the structural analysis methods that were used to evaluate the limit load and buckling of the single shell tanks.

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