“Equinix is taking a diversified portfolio approach to the global energy challenge by tapping into innovative power technologies and working directly with utilities to strengthen the grid,” the California-headquartered company said. “Looking ahead, the company is supporting the development of advanced nuclear technologies that can deliver reliable, clean power in the future.
“Next generation nuclear technologies can offer a pathway to faster nuclear deployments due to their simplified design and robust safety features. Equinix sees safe, efficient and reliable nuclear energy as a promising solution to help power both data centres and the broader grid.”
California-headquartered Equinix has now announced a preorder agreement with Radiant for the purchase of twenty 1 MWe Kaleidos high-temperature gas-cooled portable microreactors. The Kaleidos will use a graphite core and TRISO (tri-structural isotropic) fuel.
Radiant was one of eight technology developers selected earlier this year as potential microreactor suppliers made eligible to receive funding under the Advanced Nuclear Power for Installations programme: an initiative launched in 2024 by the Defense Innovation Unit in collaboration with the Department of the Army and the Department of the Air Force, with the goal of “working to design, license, build, and operate one or more microreactor nuclear power plants on military installations”.
Earlier this week, Radiant was among 11 advanced reactor projects that the US Department of Energy announced as its initial selection for the Nuclear Reactor Pilot Program, which aims to see at least three of them achieve criticality in less than one year from now.
“Kaleidos offers a reliable, long-lasting energy source that can be transported anywhere it’s needed, installed in days, and deployed safely alongside existing equipment and integrated with on-site transmission infrastructure,” Equinix said.
In a post on X (formerly Twitter), Radiant said: “We’re proud to share that Equinix, the world leader in digital infrastructure, has signed a deal and submitted deposits for the purchase of 20 Kaleidos microreactors. This is not only the largest deal to date for us, it’s the largest deal to date for any mass-manufactured reactor.”
Dutch power purchase agreement
Equinix also announced the signing of a Letter of Intent with ULC-Energy for a power purchase agreement up to 250 MWe to power data centres in the Netherlands.
In August 2022, Rolls-Royce SMR of the UK signed an exclusive agreement with ULC-Energy to collaborate on the deployment of Rolls-Royce SMR power plants in the Netherlands. ULC-Energy – established in 2021 and based in Amsterdam – aims to accelerate decarbonisation in the Netherlands by developing nuclear energy projects that efficiently integrate with residential and industrial energy networks in the country.
(Image: ULC-Energy)
“Our partnership with ULC-Energy marks an important milestone in Equinix’s mission to support sustainable growth in the Netherlands,” said Michiel Eielts, Managing Director for Equinix in the Netherlands. “By securing Rolls-Royce SMR capacity, we’re not only ensuring reliable and clean energy for our data centres but also contributing to a resilient energy future that benefits local communities, supports economic development, and helps reduce the environmental impact of digital infrastructure.”
ULC-Energy CEO Dirk Rabelink said: “Small modular reactors (SMRs) are ideally suited to power increasing demand for data centres. They can deliver clean baseload electricity safely, reliably, and affordably. ULC-Energy has developed a deployment model that leverages the SMR’s capability to address data centre energy requirements whilst also providing a realistic and affordable solution to support the increasing regional grid and energy challenges. The SMR-powered data centre will enable a clean digital solution and will be a strategic regional energy asset benefitting many local stakeholders.”
Equinix has previously signed agreements with other SMR developers. In April 2024, it signed an agreement to procure 500 MW of energy from US company Oklo’s next-generation fission Aurora powerhouses. It has also signed a pre-order power agreement for 500 MWe with French molten salt reactor developer Stellaria to power its European data centres.
“The potential challenges to powering reliable and sustainable digital infrastructure are considerable,” said Ali Ruckteschler, Senior Vice President and Chief Procurement Officer at Equinix. “However, Equinix has always been at the forefront of energy innovation, signing the data centre industry’s first agreement with a SMR provider and pioneering the use of fuel cells a decade ago. Powering AI infrastructure responsibly is a global priority. With Equinix’s operational expertise, trusted supply chain, and close partnerships with the US and global governments and utilities, we are poised to deliver safe, secure and reliable AI solutions for our customers and the communities we serve.”
