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Great British Nuclear Selects the Westinghouse AP300™ SMR for the United Kingdom’s Newbuild Program


Westinghouse Electric Company today announced our AP300™ small modular reactor (SMR), the only SMR based on a licensed, operating nuclear reactor, has been selected for the next phase of Great British Nuclear’s competitive technology selection process.

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The Westinghouse AP300™ SMR is the only SMR available based on licensed and operating nuclear reactor technology. (Photo: Business Wire)

The Westinghouse AP300™ SMR is the only SMR available based on licensed and operating nuclear reactor technology. (Photo: Business Wire)

Great British Nuclear launched in July 2023 to enhance U.K. energy security and grow the clean economy through the “rapid expansion of new nuclear energy plants.” Westinghouse has a 75-year history operating in the U.K. at its nuclear manufacturing facility at Springfields. Today, Westinghouse has a world class workforce of approximately 1,000 employees in the U.K. and supplies advanced nuclear fuel for the British reactor fleet.

“Congratulations to Great British Nuclear on their swift progress. We are proud to provide our proven, advanced AP300 SMR technology to build a more secure, cleaner energy future. Westinghouse will leverage our deep U.K. and global nuclear heritage, expertise and delivery in support of the U.K.’s net zero and energy security ambitions,” said Patrick Fragman, Westinghouse President and CEO. “We look forward to this opportunity to demonstrate that the AP300 SMR is the best option for the U.K.”

In May 2023, Westinghouse launched the AP300 small modular reactor, the only SMR based on an advanced, large Generation III+ reactor already in operation globally, the proven AP1000® technology. Unlike every other SMR under development with first-of-a-kind technologies and risks, Westinghouse’s AP300 SMR utilizes the AP1000 engineering, components and supply chain, enabling streamlined licensing and leveraging available technical skills. Together, these factors provide confidence that the first operating unit will be available in the early 2030s. The advantageous economics of the AP300 SMR are based on robust analysis and existing project costs from AP1000 reactors already in operation or development on three continents. The AP300 SMR is already under consideration by customers in the U.K., Europe, and North America.

Westinghouse Electric Company is shaping the future of carbon-free energy by providing safe, innovative nuclear and other clean power technologies and services globally. Westinghouse supplied the world’s first commercial pressurized water reactor in 1957 and the company’s technology is the basis for nearly one-half of the world's operating nuclear plants. Over 135 years of innovation makes Westinghouse the preferred partner for advanced technologies covering the complete nuclear energy life cycle. For more information, visit and follow us on Facebook, LinkedIn and X.