Inside the Nuclear Race for Data Center Energy with Aalo Atomics CEO Matt Loszak

The latest episode of the DCF Show podcast addresses one of the most critical challenges facing the data center industry: the search for sustainable, high-density power solutions. As hyperscale operators like Google and Meta face growing energy demands and resistance from utilities unable or unwilling to support their expansion, the conversation around nuclear energy has gained momentum.

Both established nuclear providers and innovative startups are vying for the data center industry's future business, each offering distinct approaches. Our guest, Matt Loszak, co-founder and CEO of Aalo Atomics, shares insights into his company's fresh approach to nuclear energy.

Aalo Atomics, which raised $29.5 million in Series A funding in 2024, has developed a 10-megawatt sodium-cooled reactor that eliminates the need for water cooling, offering greater siting flexibility. Inspired by the Department of Energy’s MARVEL microreactor, Aalo’s design benefits from direct expertise, as the company’s CTO was the chief architect behind MARVEL.

Aalo’s vision extends beyond reactor design to full-scale modular plant production. Rather than simply building reactors, the company aims to manufacture complete nuclear plants using prefabricated, modular components that can be shipped in standard containers. These plants are designed to fit within the footprint of a data center and require no onsite water—features that make them especially attractive to hyperscale operators seeking localized, high-density power.

Aalo has made significant progress, with the Department of Energy identifying Idaho National Laboratory (INL) as a potential site for its first nuclear facility. The company is on an accelerated timeline, planning to complete a non-nuclear prototype within three months and break ground on its first reactor in about a year—remarkably fast for the nuclear sector.

Aalo’s modular nuclear power solution for data centers is designed to deliver 50 megawatts, using a sodium-cooled reactor inspired by the MARVEL microreactor at INL. “In just 30 months, Marvel became the first reactor the DOE has ever authorized for construction,” said Loszak. Aalo has brought in key members from the Marvel project, including its chief architect, to speed up development.

During our conversation, Loszak discusses the implications of this new wave of nuclear innovation, including the shifting stance of the Trump administration on nuclear energy, the evolving economics of nuclear power (where past projects faced cost overruns and delays), and common misconceptions about nuclear safety, such as fears of reactor meltdowns and waste management.