Westinghouse is working on two nuclear reactor designs, the AP1000 and the AP300, using a single technology platform. The company has extended its collaboration with engineering firm Amentum to support the deployment of large reactors and the regulatory process for small modular reactors.
Shared Technology for Two Reactor Designs
The AP300 reactor uses the same core technology as the AP1000, which is already in commercial use. This strategy reduces the need for major changes in engineering, components, and supply chains. Utilities may save money by building on a proven design they already trust instead of starting from scratch with a new reactor.
Dan Sumner, Westinghouse President and CEO, said the company continues to invest in the APX technology platform to support both reactor designs. He added that Amentum’s engineering help will speed up the licensing process for the AP300 and strengthen execution for AP1000 projects.
Licensing and Global Expansion
Amentum is now responsible for the engineering work needed to secure the AP300’s U.S. licensing with the Nuclear Regulatory Commission. Another agreement focuses on expanding AP1000 reactor deployment in countries planning new nuclear power projects. Both efforts benefit from the shared platform’s common design and supply chain features.
John Heller, Amentum’s CEO, said the partnership addresses the growing demand for reliable, continuous power needed for data centers, artificial intelligence infrastructure, and industrial expansion. He added that the collaboration will help meet these energy needs and provide firm baseload power.
Expanding Global Nuclear Collaboration
Westinghouse and Amentum have a long history of working together on nuclear projects in the United States, the United Kingdom, Poland, Slovakia, Lithuania, and South Africa. The new agreements deepen this partnership as Westinghouse advances both its AP1000 and AP300 reactor designs.
Westinghouse’s long-term vision includes potentially seeing up to 91 AP1000 reactors deployed worldwide, providing up to 105 GWe of new nuclear generation. This includes up to 10 reactors linked to the Department of Energy's American nuclear supply chain loans, up to 10 reactors through its strategic partnership with the Department of Commerce, and several units at specific international sites such as Poland and Bulgaria.
The companies aim to simplify deployment and manufacturing by using the same base design for both large and small reactors. This approach could reduce regulatory challenges and lower barriers to commercial deployment.
By using proven technology, the AP300 can be developed faster and more efficiently. This strategy may help bring new nuclear power options to market at a faster pace, meeting energy demands for new industries like AI and data centers.
The shared platform helps ensure consistency in design, manufacturing, and operations across both reactor types. Utilities and regulators may benefit from a streamlined process with reduced complexity.
The AP1000 is already in commercial operation, which gives Westinghouse a solid foundation for expanding its reactor portfolio. The AP300 brings many of the same design principles to customers needing lower generating capacity without the need for an entirely new reactor.
The collaboration with Amentum is expected to help Westinghouse deliver more consistent results for its reactor projects. The company hopes to scale up its reactor deployments in the coming years as demand for clean energy grows.
Westinghouse has also announced it has confidentially filed for an initial public offering with the Securities and Exchange Commission, although few details about the offering are available at this time.
Both companies believe that the global need for reliable and continuous power will keep growing. Westinghouse and Amentum are working together to meet this demand by advancing their reactor designs and supporting new nuclear projects around the world.
This partnership is a key step in expanding nuclear energy’s role in meeting future electricity needs. By leveraging proven technology and shared infrastructure, Westinghouse and Amentum aim to make nuclear power more accessible and efficient for a variety of customers.
The shared platform and collaborative efforts could help reduce the cost of new nuclear projects and make it easier to scale up production and deployment. This approach may help bring nuclear power to more countries and industries in the coming years.
Westinghouse and Amentum are positioned to play a major role in shaping the future of nuclear energy. Their joint efforts may help make nuclear power a more viable option for meeting the energy demands of tomorrow.
The companies are working to meet the needs of both traditional and emerging energy markets. This includes supporting new nuclear projects in countries looking to expand their power generation capacity.
As part of this effort, Westinghouse is investing in the APX technology platform to support its long-term reactor portfolio. The company believes this platform will help streamline reactor development and reduce the time and cost of bringing new designs to market.
Westinghouse and Amentum’s partnership is expected to help bridge the gap between traditional nuclear reactors and small modular reactors. This could make it easier for utilities to transition to new reactor designs without starting from scratch.
The collaboration is also expected to support the deployment of new nuclear projects in the United States and other countries. Both companies are working to expand their reach and meet the growing demand for clean and reliable energy.
Overall, the partnership between Westinghouse and Amentum is a key step in advancing nuclear energy. Their shared platform and engineering support could help make nuclear power a more accessible and cost-effective option for a variety of customers.

