Breakthrough in Advanced Nuclear Technology
Antares, a pioneering nuclear power startup, has made a groundbreaking announcement by securing a staggering $470 million in funding to develop small reactors for the U.S. military. This monumental investment underscores the growing interest in advanced nuclear startups, fueled by the rapid expansion of data centers and the increasing demand for new sources of power.
The Series C funding round, led by Paradigm and Caffeinated Capital, also saw participation from Industrious Ventures, Point72 Ventures, and Shine Capital. The round consisted of $370 million in equity and $100 million in debt, marking a significant milestone for Antares and the nuclear power industry as a whole.
At the heart of Antares’ innovative technology is the small modular reactor (SMR), a compact and efficient design capable of producing between 100 kilowatts and 1 megawatt of electricity. This is sufficient to power up to 750 homes, making it an attractive solution for remote military bases and other off-grid locations.
Antares’ reactor utilizes TRISO fuel, a safer alternative to traditional nuclear fuel that encapsulates uranium in carbon and ceramic shells. This advanced fuel design has been touted for years as a safer and more efficient option, with the added benefit of being able to be cooled by gases like helium or molten salts.
The company’s demonstration reactor, Mark-0, reached criticality on June 4 at the Idaho National Laboratory, marking a significant achievement in the development of advanced nuclear technology.
As one of three finalists in the Pentagon’s Advanced Nuclear Power for Installations program, Antares aims to bring its first electricity-producing reactor online next year, with deployments at U.S. military installations planned for 2028.
Investors have been flocking to nuclear power and fission in particular, driven by the surge in electricity demand due to data center construction and the broader electrification of the economy. X-energy raised $1 billion through an IPO in April, while Radiant Energy, Standard Nuclear, and Last Energy have each secured nine-figure rounds since December.
Despite investor excitement, advanced nuclear startups face several hurdles to commercialization, including an immature supply chain in the U.S. and challenges with scaling production. Many SMR startups tout the benefits of mass manufacturing, claiming it will significantly reduce costs. However, the benefits of mass manufacturing typically take at least a decade to materialize, and no startup has yet reached that stage.
The first SMRs, expected to enter service in the early 2030s, are unlikely to be cost-competitive with most new power plants. Lazard estimates that new SMRs will cost around $214 per megawatt hour, more than all but the most expensive gas turbines.
Antares has not disclosed its pricing, but given the realities of the market, it’s not surprising that the startup has decided to focus on contracts for the U.S. military, a famously price-insensitive customer.
