Major milestone reached at Vogtle-3

Vogtle-3, in September. Photo: Georgia Power

Georgia Power has announced the completion of cold hydro testing at Vogtle-3, one of two 1,100-MWe Westinghouse AP1000 pressurized water reactors under construction at the Vogtle site near Waynesboro, Ga.

Unit 3 construction is now approximately 94 percent complete, and the total Vogtle-3 and -4 expansion project is about 88 percent complete, according to the company’s October 19 announcement. The last major test for Vogtle-3 before initial fuel loading is hot functional testing.

Cold hydro testing of Unit 3 confirmed that the reactor’s coolant system functions as designed and verified that the welds, joints, pipes, and other components of the coolant system and associated high-pressure systems do not leak when under pressure, Georgia Power said. The company also noted that it expects to meet the regulatory-approved in-service dates for the new reactors: November 2021 for Unit 3, and November 2022 for Unit 4.