50% hydrogen blend testing successfully completed at Georgia Power's Plant McDonough-Atkinson

Georgia Power and Mitsubishi Power collaborate on the world's largest hydrogen fuel blending demonstration to date on an advanced class gas turbine;
Latest test builds on 2022 test as company continues to advance innovative R&D, cleaner natural gas technologies to serve Georgia electric customers

ATLANTA, June 16, 2025 /PRNewswire/ -- Georgia Power and Mitsubishi Power have successfully completed a second trial blending hydrogen and natural gas fuels at both partial and full load on an M501GAC natural gas turbine at Georgia Power's Plant McDonough-Atkinson in Smyrna, Georgia. The demonstration project is the first to validate 50%* hydrogen fuel blending on an advanced class gas turbine, and the largest test of this kind in the world to date, with the 50% blend providing an approximately 22% reduction in CO2 emissions compared to 100% natural gas. Several tests were conducted prior to the 50% blend demonstration including multiple blend percentages that ranged from 5% to 50%, and testing occurred across several weeks in May and June.

Last year, the existing gas turbine was converted from steam-cooled to air-cooled, which includes J series combustion technology with proven high hydrogen co-firing capability. The conversion provides the benefits of faster startup times, increased turn down capability and decreased maintenance expenses, while also supporting the ability for this successful landmark hydrogen blend testing.

Georgia Power, the largest electric subsidiary of Southern Company, collaborated with Mitsubishi Power for the landmark testing as part of a continued commitment to new research and development (R&D) to advance reliable and affordable energy for customers, while reducing carbon emissions across its generation fleet. In fact, Georgia Power has reduced its carbon emissions by more than 60% since 2007. This test follows the first 20% by volume hydrogen blending test at Plant McDonough-Atkinson completed in 2022.

Learn more about Georgia Power's landmark hydrogen blending project.

The Plant McDonough-Atkinson facility, located less than ten miles from downtown Atlanta, has served electric customers for more than 80 years and was fully converted to natural gas in 2012 and expanded to power up to 1.7 million homes. It currently operates with six advanced, large-capacity M501G and M501GAC series gas turbines, which deliver high performance and high efficiency, as well as three steam turbines running in three blocks of 2-on-1 combined-cycle configuration and two gas/oil fueled combustion turbines.

"Natural gas serves a critical role in our generation mix, providing flexibility, baseload power and quick response to customer demand, and will continue to be an important fuel as we plan to meet the energy needs of a growing Georgia through a diverse portfolio of generation resources," said Rick Anderson, senior vice president and senior production officer for Georgia Power. "At Georgia Power, innovative testing such as this is just one way we help ensure we can deliver reliable and affordable energy for customers for decades into the future, and reduce our overall emissions. Investments we're making in our fleet and power grid today will benefit future generations, and I'm very proud of the team at Plant McDonough-Atkinson and Mitsubishi Power for their dedication to this project and safely completing this test."

Mitsubishi Power completed the hydrogen blending on one M501GAC gas turbine unit, with an approximate one-on-one output of 283 MW. Mitsubishi Power provided full turnkey service for this project including engineering, planning, hydrogen blending hardware, controls, commissioning and risk management. Mitsubishi Power partnered with Certarus to source and manage the hydrogen supply and logistics.

"It has been a privilege to partner with Georgia Power on this landmark project.," said Mark Bissonnette, executive vice president and chief operating officer of Power Generation at Mitsubishi Power Americas. "Building on the success of our earlier tests, we have achieved a 50% hydrogen blend in an advanced-class gas turbine, showcasing the capabilities of our state-of-the-art technology. This is a significant milestone for both companies to help Georgia Power reduce carbon emissions across its generation fleet."

Southern Company's industry-leading R&D organization served as technical consultants on the project. The team is engaged in research focused on low-carbon hydrogen power generation, production, delivery, transportation, infrastructure and energy storage.

Natural Gas Supports Energy Needs of a Growing Georgia
Natural gas currently provides 40 percent of Georgia Power's annual energy generation and has long been a bedrock fuel for the company. Georgia Power continues to work with the Georgia Public Service Commission (PSC) to ensure it can reliably and economically meet the energy needs of a growing Georgia through the longstanding Integrated Resource Plan (IRP) process. The company is currently developing three new Mitsubishi Power simple cycle combustion turbine resources, capable of utilizing hydrogen, at Plant Yates in Coweta County as approved by the Georgia PSC in the 2023 Integrated Resource Plan (IRP) Update.

In addition to new natural gas generation, Georgia Power is also investing in existing power plants to better serve Georgia. Notably, the company has proposed upgrades to ten natural gas turbines - both combined cycle and simple cycle - at Plant McIntosh in the 2025 IRP. These enhancements are expected to add an additional 268 megawatts of capacity, helping to meet the projected energy demands from existing infrastructure. Combined with new renewable generation resources such as solar, these initiatives highlight Georgia Power's dedication to reducing carbon emissions while fostering a resilient and reliable energy future and meeting the increasing energy needs of the state.

To learn more about how Georgia Power is meeting the needs of customers through a diverse, balanced energy portfolio, and the IRP process, visit www.GeorgiaPower.com. 

* The ratio of hydrogen content indicates volume ratio.

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 2.8 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 offers rates below the national average, 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), X (X.com/GeorgiaPower) and Instagram (Instagram.com/ga_power).

About Mitsubishi Power
Mitsubishi Power Americas, Inc. (Mitsubishi Power) headquartered in Lake Mary, Florida, employs more than 3,000 power generation, energy storage, and digital solutions experts and professionals. Our employees are focused on empowering customers to affordably and reliably combat climate change while also advancing human prosperity throughout North, Central, and South America. Mitsubishi Power's power generation solutions include gas, steam, and aero-derivative turbines; power trains and power islands; geothermal systems; PV solar project development; environmental controls; and services. Energy storage solutions include green hydrogen, battery energy storage systems, and services. Mitsubishi Power also offers intelligent solutions that use artificial intelligence to enable autonomous operation of power plants. Mitsubishi Power is a power solutions brand of Mitsubishi Heavy Industries, Ltd. (MHI). Headquartered in Tokyo, Japan, MHI is one of the world's leading heavy machinery manufacturers with engineering and manufacturing businesses spanning energy, infrastructure, transport, aerospace, and defense. For more information, visit the Mitsubishi Power Americas website and follow us on LinkedIn.

SOURCE Georgia Power; Mitsubishi Power