Virtual Installation for Nuclear Industry

Independent Spent Fuel Storage Installation (ISFSI)

At a Glance

Steps

  • Laser scan as-built surface
  • Heatmap non-conformance
  • 3D Model Container Units
  • Virtually Install/Set 20 individual units
  • ID Grind & Shim areas
  • Successfully install units.

Results Summary

  • Reduced slab investigation and grinding requirements
  • Providing increased confidence level for Dry Cask Storage Unit placement within tolerance.
  • Saving project schedule
  • Avoiding rigging demobilization charge
  • Reducing labor hours
  • Reducing grinding risks to ISFSI Slab

Challenges V. Solutions

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.