NRC Considers License Amendment for Plant Vogtle

Southern Co. says the license amendment request is necessary because it involves a change in the design basis for the new AP1000 reactor.

NRC_LogoSouthern Co. wants to amend its Plant Vogtle construction license after unforeseen settling of soil beneath the foundation for its new Unit 3 reactor created an uneven surface.

In a letter to the U.S. Nuclear regulatory Commission, dated March 30 and recently made public, the company said the concrete “mudmat” that lies atop compacted, load-bearing soil “is not as level as expected.”

The current license allows only a 1-inch variability in the levelness of the basemat, and the amendment would increase that leeway to 4 inches and allow engineers to use more concrete when the basemat is poured to ensure a level surface for the “nuclear island” buildings.

Click here to read the complete article.

Source: Rob Pavey | The Augusta Chronicle
Image: U.S. Nuclear Regulatory Commission