Evaluation of Structural Components at Idaho National Engineering Laboratory

Thirty reinforced concrete columns were suspected of freezing when this structure was originally built in 1969. Although the columns were not in a critical area of the building at the time of original construction, a later expansion of the reactor building put new emphasis on their structural integrity. CTLGroup was engaged to do nondestructive pulse-velocity testing, in combination with testing of cores extracted from the columns, to determine which columns were sufficiently durable and which ones required removal and replacement.

In a separate investigation, CTLGroup conducted an independent review of cracks in safety-related containment vessels at Idaho Falls. This investigation was commissioned at the insistence of the NRC. Cracks had developed and the long-term durability of the vessels was at issue.