Abstract
Pretest predictions were made by the Reactor Analysis and Safety Division of Argonne National Laboratory for the response of the 1 :6-scale reinforced concrete model to be tested by Sandia National Laboratories. For this purpose a series of axisymmetric models were studied with the two-dimensional computer program TEMP-STRESS and a three-dimensional circumferential segment model with the program NEPTUNE. The two-dimensional models predicted failure at 175–190 psig (1.207–1.310 MPa). However, two different failure mechanisms were indicated: (1) hoop failure of the vessel at midheight following failure of a splice in this area, (2) failure of a weld in the liner near the basemat due to excessive strains. The three-dimensional model predicted failure at an internal pressure of 180–185 psig (1.241–1.276 MPa) by failure of the splices of the hoop rebars just above cylinder midheight in a region away from the equipment hatch opening.
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