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Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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A series of firsts delivers new Plant Vogtle units
Southern Nuclear was first when no one wanted to be.
The nuclear subsidiary of the century-old utility Southern Company, based in Atlanta, Ga., joined a pack of nuclear companies in the early 2000s—during what was then dubbed a “nuclear renaissance”—bullish on plans for new large nuclear facilities and adding thousands of new carbon-free megawatts to the grid.
In 2008, Southern Nuclear applied for a combined construction and operating license (COL), positioning the company to receive the first such license from the U.S. Nuclear Regulatory Commission in 2012. Also in 2008, Southern became the first U.S. company to sign an engineering, procurement, and construction contract for a Generation III+ reactor. Southern chose Westinghouse’s AP1000 pressurized water reactor, which was certified by the NRC in December 2011.
Fast forward a dozen years—which saw dozens of setbacks and hundreds of successes—and Southern Nuclear and its stakeholders celebrated the completion of Vogtle Units 3 and 4: the first new commercial nuclear power construction project completed in the U.S. in more than 30 years.
As vice president of nuclear strategy & development for Exelon, Marilyn Kray leads major initiatives on current and advanced reactor designs to create growth opportunities that leverage Exelon’s nuclear operations competency. These initiatives include pursuing operational service agreements, both domestically and internationally, as well as engaging with advanced reactor developers in order to evaluate potential business opportunities and future technology deployment.
She served as president of NuStart Energy Development LLC, an industry consortium formed to develop the process for preparing the combined construction and operating license applications for the first new nuclear plant construction in the United States in over 30 years.
Her in-depth knowledge of the global nuclear industry comes from years of experience including as vice president of Exelon Nuclear Partners. In this role, she led international business development. Prior to this, she served as Exelon’s vice president of nuclear acquisition support, where she pioneered internal processes for due diligence and plant transitions. The result was the successful purchases of the Three Mile Island, Clinton, and Oyster Creek generating stations. More recently, she led the acquisition of the FitzPatrick nuclear power plant.
Marilyn began her career with Exelon in the licensing organization for the Peach Bottom Atomic Power Station. Prior to joining Exelon, she was a reactor engineer and project manager for the U.S. Nuclear Regulatory Commission. She has testified in front of Congress on multiple occasions regarding nuclear development in the United States. Throughout her career Marilyn has served in leadership roles as Exelon’s representative to the Nuclear Energy Institute and the Electric Power Research Institute.
Marilyn has been a member of ANS since 2007 and serves in the Education, Training, and Workforce Development Division as well as the Operations and Power Division. In 2007, she received the American Nuclear Society’s Utility Leadership Award. Other recognitions Marilyn has received include the World Nuclear Association award for Distinguished Contribution to the Peaceful Use of Nuclear Technology, and under her leadership the NuStart organization was one of four finalists for the 2012 Edison Award.
Marilyn is a graduate of Carnegie-Mellon University, with a Bachelor of Science degree in Chemical Engineering.
Read Nuclear News from July 2019 for more on Marilyn.
Last modified September 13, 2019, 11:26am CDT
