Implications of results from full-scale tests of reinforced and prestressed concrete containments

Abstract

Test results from full-scale tests of elements of concrete containments indicate that small liner plate cracks may form. A possible consequence of these small cracks could be depressurization without global failure and with much reduced release of contaminants. The tests of response of reinforced and prestressed concrete containment buildings are being performed at Construction Technology Laboratories, Inc. (CTL) in Skokie, Illinois, under the sponsorship of the Electric Power Research Institute (EPRI). Three specimens are discussed. Two large square elements of a containment wall were tested in biaxial tension while a central pipe penetration was axially loaded. A large L-shaped wall/basemat junction specimen was tested with a combination of axial tension, bending, and shear. The loading on each specimen represented the forces developed from severe over-pressurization in the containment. The specimens were tested at full-scale to avoid modifications that could be required to produce a scale model. Full-size details were used for the liner and anchorage. The overall intent of the EPRI sponsored program is to establish a data base that can be used for verification of analytical models being developed by Anatech International, La Jolla, California. Testing is continuing at CTL.