Independent Spent Fuel Storage Installation (ISFSI)
At a Glance
Challenge The concrete pad constructed for the dry cask storage units suffered scaling/delamination and consequently did not meet required standards for flatness. A cost effective solution was needed to avoid demolition and reconstruction of the concrete pad.
Solution Combined the analytical power of multiple applications with a 3D laser scan to generate clear visualization of the pad defects. A 3D model of each dry cask unit was virtually installed by creating a best fit plane of the foundation bearing area and controlling allowable deflection and separation between all adjacent units.
The use of spot grinding and 1’x1′ steel shims to overcome the pad defects was then proven and allowed the installers to meet stringent criteria.