Vogtle Nuclear Expansion Project Marks Multiple Construction Milestones

Latest construction achievements include Vogtle Unit 3 concrete 'super placement' and lift of 237-ton CA03 module

Atlanta, GA /PRNewswire/ - Progress continues at the Vogtle nuclear expansion site near Waynesboro, Georgia. The latest milestones achieved over the past week include a critical concrete 'super placement' for Unit 3 and the lift of the 237-ton CA03 module for Unit 4.

The 71-hour continuous concrete placement included 1,844 cubic yards of concrete – enough to create a sidewalk more than six miles long. New concrete was poured in four key areas of the Unit 3 containment vessel – the refueling cavity, the bottom of the in-containment refueling water storage tank, the west steam generator cubicle walls and the pressurizer cubicle walls.

The 237-ton CA03 module for Unit 4 is a critical component and part of the In-Containment Refueling Water Storage Tank (IRWST). The IRWST is a 75,300 cubic foot tank that, once the units are operational, is filled with borated water and provides passive heatsink within containment and backup cooling for the reactor vessel.

Other significant milestones achieved at the Vogtle construction site over the past 30 days include the placement of the CA33 floor module for Unit 3. The module, weighing 35 tons, was delivered to the site from Greenberry Industrial in three sub-modules that were then welded together on site in the Vogtle Module Assembly Building. Additionally, workers placed the Vogtle Unit 4 deaerator inside the turbine building. The 148-foot, 300-ton deaerator functions like a water purifier, eliminating dissolved gasses such as carbon dioxide and oxygen from feedwater. Deaeration prevents corrosion, helping to reduce plant maintenance and operating costs.

More than 6,000 workers from across the country are on-site at Plant Vogtle today working to complete the nation's first new nuclear units in 30 years. New photos of progress at the construction site are available each month in the Plant Vogtle 3 & 4 Online Photo Gallery.

Vogtle Project Review Underway
Georgia Power owns 45.7 percent of the new units, with the project's other Georgia-based co-owners including Oglethorpe Power, MEAG Power and Dalton Utilities. On August 31, Georgia Power filed a recommendation with the Georgia Public Service Commission (PSC) to continue construction of the Vogtle nuclear expansion supported by all of the project's other co-owners. The recommendation was based on the results of a comprehensive schedule, cost-to-complete and cancellation assessment launched following the bankruptcy of Westinghouse in March. The Georgia PSC is expected to review the recommendation and make a decision regarding the future of the Vogtle 3 and 4 project as part of the 17th Vogtle Construction Monitoring (VCM) proceeding. Read more here.

From the beginning of the Vogtle expansion, Georgia Power has worked to minimize the impact of the new units on customer bills. This effort continues during the Georgia PSC's review of the recommendation with the company recently announcing a conditional commitment of approximately $1.67 billion in additional loan guarantees for the project from the U.S. Department of Energy (DOE), as well as receipt of the first of multiple scheduled parent guarantee payments from Toshiba. Today, the total expected rate impact of the project remains less than the original estimate, after including anticipated customer benefits from federal production tax credits, interest savings from loan guarantees from the DOE and the fuel savings of nuclear energy.

Final approval and issuance of these additional loan guarantees by the DOE cannot be assured and are subject to the negotiation of definitive agreements, completion of due diligence by the DOE, receipt of any necessary regulatory approvals, and satisfaction of other conditions.

About Georgia Power
Georgia Power is the largest electric subsidiary of Southern Company (NYSE: SO), America's premier energy company. Value, Reliability, Customer Service and Stewardship are the cornerstones of the company's promise to 2.5 million customers in all but four of Georgia's 159 counties. Committed to delivering clean, safe, reliable and affordable energy at rates below the national average, Georgia Power maintains a diverse, innovative generation mix that includes nuclear, coal and natural gas, as well as renewables such as solar, hydroelectric and wind. Georgia Power focuses on delivering world-class service to its customers every day and the company is consistently recognized by J.D. Power and Associates as an industry leader in customer satisfaction. For more information, visit www.GeorgiaPower.com and connect with the company on Facebook (Facebook.com/GeorgiaPower), Twitter (Twitter.com/GeorgiaPower) and Instagram (Instagram.com/ga_power).

Cautionary Note Regarding Forward-Looking Statements
Certain information contained in this communication is forward-looking information based on current expectations and plans that involve risks and uncertainties. Forward-looking information includes, among other things, statements concerning future actions related to Plant Vogtle Units 3 and 4 and the expected benefit of the DOE loan guarantees. Georgia Power cautions that there are certain factors that could cause actual results to differ materially from the forward-looking information that has been provided. The reader is cautioned not to put undue reliance on this forward-looking information, which is not a guarantee of future performance and is subject to a number of uncertainties and other factors, many of which are outside the control of Georgia Power; accordingly, there can be no assurance that such suggested results will be realized. The following factors, in addition to those discussed in Georgia Power's Annual Report on Form 10-K for the year ended December 31, 2016, and subsequent securities filings, could cause actual results to differ materially from management expectations as suggested by such forward-looking information: the impact of any inability or other failure of Toshiba to perform its obligations under its guarantee; the impact of any failure to extend the in-service deadline for federal production tax credits; the impact of any failure to amend the DOE loan guarantee to allow for additional borrowings; state and federal rate regulations and the impact of pending and future rate cases and negotiations; the impact of recent and future federal and state regulatory changes, as well as changes in application of existing laws and regulations; current and future litigation, regulatory investigations, proceedings, or inquiries; available sources and costs of fuels; effects of inflation; the ability to control costs and avoid cost overruns during the development construction and operation of facilities, which include the development and construction of generating facilities with designs that have not been finalized or previously constructed; the ability to construct facilities in accordance with the requirements of permits and licenses, to satisfy any environmental performance standards and the requirements of tax credits and other incentives, and to integrate facilities into the Southern Company system upon completion of construction; advances in technology; legal proceedings and regulatory approvals and actions related to Plant Vogtle Units 3 and 4, including Georgia Public Service Commission approvals and Nuclear Regulatory Commission actions; interest rate fluctuations and financial market conditions and the results of financing efforts; changes in The Southern Company's or Georgia Power's credit ratings, including impacts on interest rates, access to capital markets, and collateral requirements; the impacts of any sovereign financial issues, including impacts on interest rates, access to capital markets, impacts on foreign currency exchange rates, counterparty performance, and the economy in general, as well as potential impacts on the benefits of DOE loan guarantees; and the effect of accounting pronouncements issued periodically by standard setting bodies. Georgia Power expressly disclaims any obligation to update any forward-looking information.