Several data center hyperscalers are supporting a call to massively increase the world’s nuclear power capacity.

At the CERAWeek 2025 event this week in Houston, a global coalition of large-scale energy users signed a pledge to support the goal of at least tripling global nuclear capacity by 2050.

Founding signatories of the Large Energy Users Pledge, facilitated by the World Nuclear Association, include Google, Amazon, and Meta.

Sama Bilbao y León, director general of the World Nuclear Association, said: “Thank you for joining our large energy users pledge and supporting the ambition to triple nuclear energy by 2050. This is not the end; it is just the beginning. We know that many other large energy users are considering joining the pledge in the future. That is our hope and our invitation – If you would like to be part of this group, please join us!”

The pledge includes recognition of nuclear’s potential to expand beyond traditional grid electricity to support increased energy needs; highlights how nuclear can provide energy for increased electrification and support industries such as the technology sector, and provide industrial process heat.

According to the World Nuclear Association, Nuclear energy now provides about nine percent of the world’s electricity from about 440 power reactors totaling 398,553MW of capacity. Those reactors totaled around 2,602TWh of electricity generation in 2023.

Another 70,000MW of nuclear capacity is reportedly under construction globally across 65 plants, with more than 400,000MW in planning or proposal stages across more than 400 plants.

Amid a desire for large amounts of reliable baseload power available quickly, micro and small modular reactors (SMR) have become hot topics in the data center market. Many operators have also signed deals to procure the output of larger nuclear plants.

Google recently signed a deal to purchase nuclear energy from multiple SMRs from Kairos Power. Kairos expects to deploy the first SMR by 2030, followed by further deployments through to 2035. In total, the US-only deal covers up to 500MW across six to seven reactors.

Lucia Tian, head of clean energy & decarbonization technologies at Google, said: “We are proud to sign a pledge in support of tripling nuclear capacity by 2050, as nuclear power will be pivotal in building a reliable, secure, and sustainable energy future. Google will continue to work alongside our partners to accelerate the commercialization of advanced nuclear technologies that can provide the around-the-clock clean energy necessary to meet growing electricity demand around the world.”

Amazon has invested in SMR firm X-energy and also signed deals to procure nuclear energy via SMRs. It has acquired a data center powered by a nuclear power plant in Pennsylvania.

Brandon Oyer, head of Americas energy and water for Amazon Web Services, said: “Accelerating nuclear energy development will be critical to strengthening our nation’s security, meeting future energy demands, and addressing climate change. Amazon supports the World Nuclear Association’s pledge, and is proud to have invested more than $1 billion over the last year in nuclear energy projects and technologies, which is part of our broader Climate Pledge commitment to be net-zero carbon by 2040.”

Meta, meanwhile, recently launched a request for proposals to identify potential nuclear energy developers to support 1.4GW of new nuclear generation capacity across the US.

Urvi Parekh, head of global energy at Meta, said: “As global economies expand, the need for a reliable, clean, and resilient energy supply is paramount. Nuclear energy, with its ability to provide continuous power, can help meet this rising demand.

“We’re excited to join alongside this multi-organizational effort with the Tripling Nuclear Pledge to reiterate our commitment to nuclear energy.”

Companies including Edged, Oracle, Sabey, Prometheus Hyperscale, Equinix, Switch, and others have signed deals to procure SMRs from various providers. Microsoft has also signed a deal to keep the Three Mile Island nuclear plant online.

The World Nuclear Association is an international organization that represents the global nuclear industry and aims to promote a wider understanding of nuclear energy.