Antares raises $470M to build nuclear reactors for the U.S. military

Nuclear powerfulness startup Antares said Monday that it has raised $470 cardinal to physique tiny reactors for U.S. subject bases.

The Series C round, which was led by Paradigm and Caffeinated Capital with information from Industrious Ventures, Point72 Ventures, and Shine Capital, underscores investors’ increasing involvement successful precocious atomic startups — a inclination fueled by an AI information halfway gathering roar and request for caller sources of power. The Series C circular included $370 cardinal successful equity and $100 cardinal successful debt.

Antares has been processing a tiny modular reactor (SMR) susceptible of producing betwixt 100 kilowatts and 1 megawatt of electricity, capable to powerfulness up to 750 homes. 

Like galore different precocious atomic startups, Antares’s reactor uses TRISO fuel, which encapsulates uranium successful c and ceramic shells. TRISO has been touted for years arsenic a safer alternate to accepted atomic fuel. The billiard ball-sized spheres of TRISO substance tin beryllium cooled by gases similar helium oregon molten salts. The coating is designed to forestall the substance from melting successful emblematic high-temperature reactors. 

Antares’s objection reactor, the Mark-0, reached criticality on June 4 astatine the Idaho National Laboratory.

The institution is 1 of three finalists successful the Pentagon’s Advanced Nuclear Power for Installations program, which volition trial SMRs connected Air Force bases successful Colorado and Montana. Antares aims to bring its archetypal electricity-producing reactor online adjacent year, with deployments astatine U.S. subject installations planned for 2028.

Investors person been flocking to atomic power, and fission successful particular, arsenic energy request surges successful effect to information halfway operation and the broader electrification of the economy. In April, X-energy raised $1 billion done an IPO, portion Radiant Energy, Standard Nuclear, and Last Energy person each raised nine-figure rounds since December.

Antares closed its last round, a $96 cardinal Series B, besides successful December. Altogether, Antares has raised $604 million, based connected a TechCrunch investigation of PitchBook data.

Despite capitalist excitement, precocious atomic startups look respective hurdles to commercialization, including an immature proviso concatenation successful the U.S. and challenges with scaling production. Many SMR startups tout the benefits of wide manufacturing, claiming it volition importantly trim costs. But the benefits of wide manufacturing typically instrumentality at slightest a decennary to materialize, and nary startup has reached that signifier yet.

The archetypal SMRs, which are expected to participate work successful the aboriginal 2030s, are improbable to beryllium outgo competitory with astir caller powerfulness plants. Lazard, which analyzes the outgo of energy for a assortment of technologies, expects caller SMRs to outgo astir $214 per megawatt hour. At that price, they would outgo much than each but the astir costly state turbines.

Antares hasn’t disclosed its pricing. But fixed the realities of the market, it’s not astonishing that the startup decided to pursuit contracts for the U.S. military, a famously price-insensitive customer.