Concrete poured for Plant Vogtle nuclear plant Unit 4

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Georgia Power has poured basemat structural concrete for the nuclear island at the Plant Vogtle Unit 4 nuclear expansion site near Waynesboro, Georgia.

Unit 4 is the second of two units currently under construction at Plant Vogtle. When complete, Plant Vogtle will be the only four-unit nuclear power plant in the country.

While maintaining focus on safety, quality and compliance, the basemat concrete placement was completed in just under 41 hours. The efficiency of this placement matches the best time achieved worldwide for this AP1000 activity.

The Unit 4 placement encompassed about 7,000 cubic yards of concrete, which will serve as the foundation for all of the nuclear island structures, including the containment vessel and the shield building. It covered an area about 250 feet long and 160 feet wide at its widest point, and the concrete measured six feet in thickness.

About 600 workers, including 500 craft workers representing the Building and Construction Trades, participated in this milestone as part of a coordinated effort between Georgia Power, Southern Nuclear, Westinghouse and CB&I.

The Unit 4 nuclear island has been fully formed and backfilled to grade elevation. The containment vessel bottom head (CVBH) and supporting CR10 cradle are completed and will be placed on the Unit 4 nuclear island following concrete curing. In parallel, the Unit 4 turbine building foundation has been completed and wall sections are currently being placed that also will take the turbine building to grade elevation. 

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