By Editors of Power Engineering
Georgia Power announced the placement of four step-up transformers at the Vogtle nuclear expansion, as well as other milestones.
All of the transformers, which weigh 420,000 pounds apiece, were placed in the Unit 4 transformer bays near the unit’s turbine building. The transformers will increase the voltage produced by the turbine generators from 26,000 volts to 500,000 volts before the energy flows to the state’s power grid.
Teams also completed a significant concrete placement inside the Unit 4 containment vessel, clearing the path for installation of the first-floor module for the unit, CA32.
Additionally, workers placed the second-floor module for the Unit 3 operating deck, CA56. This module is part of the steel floor that sits above the 75,300-cubic-foot In-Containment Refueling Water Storage Tank. Once the units are operational, the IRWST will be filled with borated water and will be a key safety feature within containment providing automatic, gravity-fed backup cooling for the reactor vessel.
Georgia Power is aiming for an activation date of November 2021 for unit 3 and November 2022 for unit 4.