Fluor executed the work under a project agreement with the local building trades, except for pipefitter craftwork, which was accomplished by Fluor. Manpower exceeded 2,700 craft and 1,200 on-site engineers, technicians and staff.
Callaway was the largest concrete pour in the history of Daniel Construction Company and one of the largest concrete pours in nuclear construction history at the time. Using an on-site batch plant, a two-conveyor system each placed 150 cubic yards per hour to complete the 154 feet diameter Unit 1 reactor base to 10 feet thick. In total over 7,000 cubic yards were laid in three days.
Major modifications performed by FCII include installation of permanent neutron shielding around the reactor vessel, and removal of resistance temperature detector (RTD) bypass piping. Maintenance activities have included reactor vessel removal and reinstallation, steam generator primary manway removal and reinstallation, and in-service inspection support.