Concrete Shaving at ISFSI Site

Concrete pads at the South Texas Project ISFSI (Independent Spent Fuel Storage Installation) site did not meet criteria when poured. To meet the strict regulation criteria, each 11’ diameter circle where a spent fuel cask would rest on the concrete pad had to be shaved to within the 1/16th inch specified tolerance.

Location

South Texas

Client

Independent Spent Fuel Storage Installation

Challenges

In order to effectively hit the high spots the shaving head had to automatically index, on both X and Y axes, a controllable depth adjustment of 1/16th inch. In addition, due to new OSHA silica regulations, 100% dust containment was required.

Bluegrass designed, fabricated, and deployed a self-contained diamond shaver which operated using a datum point to automatically index on both X and Y axes at each cask location. The 12’ x 12’ shaver frame was leveled using a laser to ensure the shaver head did not vary as it traversed the X and Y axes. Using this method we were able to navigate the entire cask-bearing area, shaving all high spots to within specified tolerances. Dust was controlled using our HEPA-equipped Pentek vacumes.

Solution

Outcome

Frame by frame, shaving a total of 51 12’ x 12’ cask sites, we completed the job in 25 days leaving concrete pads which passed inspection.

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