Deep Fission partners with Blue Owl Capital to provide 24/7 clean power for AI data centers using underground nuclear reactors.
US-based Deep Fission , the startup reimagining nuclear power by moving it a mile underground, announced today it has raised $80 million in new financing. The funding round draws support from major alternative asset managers, signaling a shift in how the private sector views advanced nuclear deployment.
Alongside the capital injection, Deep Fission has entered into a strategic relationship with Blue Owl Capital’s Real Assets platform. “These milestones will bolster Deep Fission’s pursuit of scalable clean energy deployments and enable us to demonstrate what’s possible with next-generation nuclear technology,” said Liz Muller, Co-Founder and CEO of Deep Fission.The two companies will collaborate to deploy Deep Fission’s Small Modular Reactors specifically for Blue Owl’s digital infrastructure portfolio. This partnership aims to provide 24/7 clean power to US electricity grids, directly addressing the massive energy demands of AI-driven data centers.Technical innovation for cost reductionThe company’s core technology is a 15-megawatt pressurized water reactor designed to be installed at the bottom of a borehole roughly one mile beneath the surface.By utilizing Earth’s natural geology, the design achieves several breakthroughs. At a depth of one mile, a column of water naturally provides the 160 atmospheres of pressure required for the reactor to function, which eliminates the need for massive and expensive surface pressure vessels. The billion-ton rock canopy provides passive containment and shielding that protects the reactor from natural disasters or surface-level threats while the billion-ton rock canopy acts as an extra layer of safety. Deep Fission estimates its approach can slash construction costs by up to 80 percent.“By leveraging established supply chains and techniques, Deep Fission estimates this approach can reduce construction costs by approximately 70–80 percent compared to traditional nuclear plants,” said the company in a press release.Rather than building sprawling above-ground facilities, Deep Fission uses directional drilling to house its reactors. Modular nature supports scalabilityThe modular nature of the system allows for scalability; while a single unit produces 15 MWe, multiple units can be co-located to power large-scale industrial hubs or data centers.To handle the “back end” of the cycle, the company utilizes borehole repositories that provide substantial isolation for many types of high-level waste in a wide range of locations. This method uses directional drilling technology to place waste hundreds of meters underground within stable geological formations rather than excavating large tunnels in a mine. Because it can be implemented modularly, it is well suited for smaller inventories of waste or as a complement to existing repositories.Deep Fission is positioning its “Gravity” reactor as a cornerstone for the next generation of advanced nuclear and AI technologies. Earlier, in December 2025, the company had announced that Parsons in Kansas will be the site for its full-scale commercial small nuclear reactor.It has selected Great Plains Industrial Park in Parsons, Kansas, as the site for its advanced reactor pilot project.
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