John R. Kelly Generation Station, Spring 2025 Outage, Cooling Tower Water Flow Distribution Restoration

This request for proposal seeks qualified contractors to perform critical repairs to the cooling tower distribution system at the John R. Kelly Generation Station during a scheduled plant outage from February 25, 2025 through March 23, 2025. The contractor should plan for approximately four working days on the front end and back end of the outage period for shutdown and startup activities, resulting in nineteen working days with the cooling tower isolated and the cold water basin drained. The outage dates are subject to change, but the number of working days with the cooling tower offline should remain largely unchanged.

The scope of work encompasses repairs to all eight half-cells of the cooling tower, including replacement of existing 4 feet by 8 feet pre-molded distribution boxes with new fiberglass reinforced plastic (FRP) distribution boxes of identical dimensions. The contractor must salvage and reinstall any grating affixed to existing distribution boxes used for personnel access, using all new 316 stainless steel hardware. The new distribution boxes must comply with specific design requirements including a frame or tray with feet holding the frame approximately 3 inches off the hot water basin panels, internal baffles spaced approximately 3 inches apart, and a cover design that provides proper clearance and securing mechanisms.

Additional work includes resealing of existing 16-inch distribution valves between their discharge and attachment points to new distribution boxes. Valve bodies must be cleaned with wire brushes and wiped with acetone to ensure proper adhesion of new polyurethane caulking (such as Vulkem 116 or equivalent). The contractor must allow adequate curing time for caulking prior to the cooling tower returning to service. Installation of new 2-inch FRP angle velocity breakers around each distribution box, placed approximately 2 feet from the distribution box on all four sides, is also required. For sagging crossover header pipes in the four West half-cells, the contractor shall level the existing 16-inch woven FRP crossover header pipes by cutting near the West half-cell distribution boxes and rewrapping the pipe once supported with a new FRP saddle at the column line near the inboard curb, in accordance with CTI STD-154, Section 4.4.

Key deadlines include a questions and answers deadline of January 17, 2025 at 10:00 PM and a proposal submission deadline of January 29, 2025 at 8:00 PM. The outage work is scheduled to commence February 25, 2025 and conclude by March 23, 2025.