Bigge Power Constructors replaced the Nuclear Reactor Vessel Heads (RVH) at the three unit Palo Verde Nuclear Generation Station in Wintersburg, AZ. Bigge engineered and fabricated custom-lifting devices to lift and rotate the RV heads, as well as engineer and install a specialized elevated through-hatch runway system to extract and insert the RV heads through the elevated containment hatch.
Because the plant had unusually tight hatch clearances and the interior floor lacked load-bearing capacity, Bigge installed a specialized cantilever RV head handling system. The old heads were extracted, the new heads were rotated, lifted and set. Bigge then transported the old heads to on-site disposal using a hydraulic platform trailer.
Under a separated contract, Bigge permitted and transported the three (3) 180-ton replacement heads some 400 miles from the port of Long Beach to Palo Verde.