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Hot Functional Testing Completed for Vogtle Nuclear Unit 4

Completion of hot functional testing marks major step towards commercial operations

Hot Functional Testing Completed for Vogtle Nuclear Unit 4

Completion of hot functional testing marks major step towards commercial operations

Published 05-15-23

Submitted by Southern Company

Vogtle Nuclear Plant

Georgia Power today announced the completion of hot functional testing for Unit 4 at the Vogtle nuclear expansion project near Waynesboro, Ga. The completion of hot functional testing marks a significant step towards operations and providing customers with a reliable, carbon-free energy source for the next 60 to 80 years. Unit 4 is projected to enter service in late fourth quarter 2023 or the first quarter 2024.

“The energy and enthusiasm at the Vogtle site, and across our entire company, is high with Unit 3 in the final stages of startup testing and Unit 4 making progress towards safely loading fuel,” said Kim Greene, chairman, president and CEO of Georgia Power. "The team at Unit 4 has been able to take lessons learned from Unit 3 and apply them. That has allowed us to safely complete hot functional testing on Unit 4 in significantly less time than we did for Unit 3. It's incredible that these new units will provide our state with zero-emissions energy for the next 60 to 80 years, and that's thanks to the dedication of the teams at the site to getting these units built, and built right.”

During hot functional testing, plant systems achieved normal operating pressure and temperature, without nuclear fuel in the reactor, to demonstrate the systems will operate on an integrated basis as designed. Now, the site team focuses on completing the remaining work necessary to submit documentation to the Nuclear Regulatory Commission (NRC) that all inspection, tests and analyses have been performed and all acceptance criteria, collectively known as ITAACS, have been met on Vogtle Unit 4 as required by Southern Nuclear’s Combined Operating License. Each ITAAC closure notice must be verified by the NRC before fuel can be loaded into the reactor.

The new Vogtle units are an essential part of Georgia Power's commitment to delivering clean, safe, reliable and affordable energy to its 2.7 million customers. Once operating, the two new units, which will be clean energy sources that produce zero emissions, are expected to power more than 500,000 homes and businesses. Southern Nuclear will operate the new units on behalf of the co-owners: Georgia Power, Oglethorpe Power, MEAG Power and Dalton Utilities.

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 2.7 million customers in all but four of Georgia’s 159 counties. Committed to delivering clean, safe, reliable and affordable energy, 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 recognized by J.D. Power 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 release 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 operations of Plant Vogtle Units 3 and 4 and the projected in-service date for Plant Vogtle Unit 4. Georgia Power cautions that there are certain factors that can 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, 2022, Quarterly Report on Form 10-Q for the quarter ended March 31, 2023, and subsequent securities filings, could cause actual results to differ materially from management expectations as suggested by such forward-looking information: the ability to control costs and avoid cost and schedule overruns during the development, construction, and operation of facilities or other projects, including Plant Vogtle Units 3 and 4, which includes components based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale, due to current and/or future challenges which include, but are not limited to, changes in labor costs, availability and productivity, challenges with the management of contractors or vendors, subcontractor performance, adverse weather conditions, shortages, delays, increased costs, or inconsistent quality of equipment, materials, and labor, contractor or supplier delay, the impacts of inflation, delays due to judicial or regulatory action, nonperformance under construction, operating, or other agreements, operational readiness, including specialized operator training and required site safety programs, engineering or design problems or any remediation related thereto, design and other licensing-based compliance matters, including, for Plant Vogtle Unit 4, inspections and the timely submittal by Southern Nuclear of the Inspections, Tests, Analyses, and Acceptance Criteria documentation and the related investigations, reviews and approvals by the NRC necessary to support NRC authorization to load fuel, challenges with start-up activities, including major equipment failure, or system integration, and/or operational performance, continued challenges related to the COVID-19 pandemic or future pandemic health events, continued public and policymaker support for projects, environmental and geological conditions, delays or increased costs to interconnect facilities to transmission grids, and increased financing costs as a result of changes in market interest rates or as a result of project delays; the ability to overcome or mitigate the current challenges at Plant Vogtle Units 3 and 4 that could further impact the cost and schedule for the project; legal proceedings and regulatory approvals and actions related to construction projects, such as Plant Vogtle Units 3 and 4, including Public Service Commission approvals and NRC actions; under certain specified circumstances, a decision by holders of more than 10% of the ownership interests of Plant Vogtle Units 3 and 4 not to proceed with construction; the notices of tender by Oglethorpe Power Corporation and the City of Dalton of a portion of their ownership interests in Plant Vogtle Units 3 and 4 to Georgia Power, including related litigation; the ability to construct facilities in accordance with the requirements of permits and licenses (including satisfaction of NRC requirements), 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; the inherent risks involved in operating and constructing nuclear generating facilities; the ability of counterparties of Georgia Power to make payments as and when due and to perform as required; the potential effects of the continued COVID-19 pandemic; the direct or indirect effect on Georgia Power's business resulting from cyber intrusion or physical attack and the threat of cyber and physical attacks; catastrophic events such as fires, earthquakes, explosions, floods, tornadoes, hurricanes and other storms, droughts, pandemic health events, political unrest, wars or other similar occurrences; and the direct or indirect effects on Georgia Power's business resulting from incidents affecting the U.S. electric grid or operation of generating or storage resources. Georgia Power expressly disclaims any obligation to update any forward–looking information.

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Southern Company

Southern Company

Southern Company (NYSE: SO) is a leading energy provider serving 9 million residential and commercial customers across the Southeast and beyond through its family of companies. Providing clean, safe, reliable and affordable energy with excellent service is our mission. The company has electric operating companies in three states, natural gas distribution companies in four states, a competitive generation company, a leading distributed energy distribution company with national capabilities, a fiber optics network and telecommunications services. Through an industry-leading commitment to innovation, resilience and sustainability, we are taking action to meet customers’ and communities’ needs while advancing our goal of net zero greenhouse gas emissions by 2050. Our uncompromising values ensure we put the needs of those we serve at the center of everything we do and are the key to our sustained success. We are transforming energy into economic, environmental and social progress for tomorrow. Our corporate culture and hiring practices have earned the company national awards and recognition from numerous organizations, including Forbes, The Military Times, DiversityInc, Black Enterprise, J.D. Power, Fortune, Human Rights Campaign and more. To learn more, visit www.southerncompany.com.

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