Amazon said on October 19, 2026, that it would finance development of a nuclear facility in Indiana as part of an expanded agreement with X-energy. The amount for this project was not disclosed. Amazon said its wider nuclear investments total billions of dollars.

X-energy says the plan covers 12 Xe-100 small modular reactors in Sullivan County, at a former coal power station. The company describes the design as using Tri-Structural ISOtropic (TRISO) fuel pellets and helium cooling. The completed facility would supply 960 megawatts to the grid, with Amazon contracted as its first power customer. X-energy is pursuing the project with American Electric Power (AEP). Completion could come in the mid-2030s at the earliest, but the schedule remains subject to change.

The technology has yet to reach commercial operation in the United States. No US small modular reactor is currently operating, although China and Russia have built functional units. One experimental US reactor has reached criticality, but it does not produce power. X-energy has not built a working reactor.

US developers can seek an NRC approval for a standard reactor design, or pursue a site-specific approval for one project. A standard approval allows the same model to be built at different sites without a fresh review of its core design. NuScale is the only US company with standard approval for an SMR, but it has no completed reactor or project under construction. Its Utah project was abandoned after power distributors showed insufficient interest.

Site-specific approvals have gone to projects including Kairos Power's reactor in Oak Ridge, Tennessee, developed with Google. General Electric is planning another Oak Ridge project, and TerraPower is advancing a delayed plant in Wyoming. X-energy says it is in the final stages of seeking a construction permit for a four-reactor project in Texas that would serve Dow Chemical. That approval would not cover Indiana, where the plan calls for 12 reactors.

X-energy did not answer questions about the Indiana project. Amazon said it would act only as an investor and the first power customer, not help secure the plant's approval. The company said early customers can help fund new reactor designs and reduce the commercial risk. For now, the Indiana plant remains a proposal rather than a working power source.