The cloud computing and retail giant signed a deal to buy electricity generated by small modular nuclear reactors. Put Amazon on the list of big technology firms embracing new nuclear technologies to fuel their data centers.

The Energy Northwest project is just the start of a planned collaboration between Amazon and X-energy to bring more than 5 gigawatts of new power projects online across the United States by 2039, representing the largest commercial target of small modular reactors to date, according to X-energy.