Closed vessel testing has been completed at Vogtle-3 at the Georgia Power site near Waynesboro, Ga., the company announced on July 14. The completion of the milestone prepares Unit 3 for cold hydro testing, which is required ahead of initial fuel load.

Vogtle-3 and -4 are the first new nuclear power reactors built in the United States in the past three decades. The new units will be powered by AP1000 reactors.

The CB-20 module being installed at Vogtle-3. Photo: Georgia Power

A massive water tank has been placed atop the containment vessel and shield building roof at Vogtle-3, one of two AP1000 reactors currently under construction at Southern Company’s nuclear expansion project near Waynesboro, Ga. The installation represents the final module placement for the unit and marks the latest significant milestone to be reached at the Vogtle site.

Vogtle-3’s integrated head package. Photo: Georgia Power

Southern Company subsidiary Georgia Power has placed the integrated head package (IHP) atop the Unit 3 reactor vessel at the Vogtle nuclear expansion project near Waynesboro, Ga., marking the latest major milestone in the construction of the first new U.S. nuclear reactors in more than 30 years.