The Arizona Public Service Co. wanted to be prepared for future expansion and renovations to the Palo Verde Nuclear Generating Station. To accomplish this preparatory work, they hired PCL to install four new cooling tower isolation valves, piping, and all associated structure and systems. The project entailed excavation and demolition of 100 linear feet of 120-inch concrete spiral-wound pipe and 80-ton thrust block, and the installation of 100 linear feet of 120-inch welded steel pipe, two formed thrust blocks, four isolation valves and valve vaults, grouting, and slurry backfill, all within a critical 17-day shutdown window. PCL's Special Projects division worked around the clock to meet the deadline and accomplish the work.
This project’s contract included an incentive clause for completion on time with no recordable incidents, but the client was clear that this had never been achieved in previous shutdowns. PCL, however, has an ongoing commitment to zero incidents. Successful coordination with all stakeholders aided in PCL’s being the client’s first renovation contractor to accomplish the goal.