Abstract
In 1982, Construction Technology Laboratories (CTL), Portland Cement Association conducted additional sonic concrete nondestructive testing (NDT) in the Service Gallery on the south process (hot) cell walls and adjacent floor slab, including the locations where significant concrete degradation had been found by the 1981 sonic NDT. In the ceiling slabs, the anchor areas For the monorail hangers, and some visible cracks were sonic NDT inspected. CTL concluded that the hot cell walls have no significant reduction of structural capacity due to concrete degradation. Epoxy injection repairs were recommended by CTL for the damaged anchor areas and through depth cracks in the reinforced concrete ceiling slabs. When completed, the epoxy repairs should be inspected and confirmed with follow on sonic NDT. Lateral bracing for the Monorail system is also recommended to relieve the lateral loads on the hangers.
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