Three US nuclear startups have hit a major milestone by activating new reactors as part of a Department of Energy pilot program, a move hailed as a step towards an "America's nuclear renaissance."
The startups reached "criticality," the point where a nuclear reactor can sustain a chain reaction, a crucial phase for eventual power generation. While other companies in the program are expected to follow suit, experts caution that these achievements, while significant for the companies involved, are still a long way from commercial reality. These are essentially test reactors, not yet market-ready products.
For decades, the nuclear industry has been dominated by large, traditional reactors. The push for smaller, more innovative designs has been hampered by slow regulatory processes and high upfront costs. This pilot program, however, aims to change that narrative by accelerating development, which could attract significant investment. The tech world, in particular, is eyeing smaller nuclear reactors as a solution for 24/7 carbon-free energy to power data centers.
The Trump administration has actively supported this push, issuing an executive order last year to expedite the process. This included regulatory cuts for environmental and safety reviews, significantly shortening development timelines. Several startups in the program have also benefited from collaboration with federally funded national laboratories, which provided fuel and key components.
Despite reaching criticality, these reactors aren't necessarily generating electricity for the grid yet. Commercial deployment will still require extensive licensing from the Nuclear Regulatory Commission, a process that traditionally takes years, though recent regulatory changes aim to speed this up. Furthermore, challenges remain in establishing robust supply chains, especially for specialized fuel, which could present major hurdles for companies aiming to bring their advanced reactor designs to market.
While the progress is celebrated as a significant achievement, some industry observers warn against over-romanticizing the prospect of a nuclear renaissance. The financial realities of building nuclear plants, which have historically been expensive and time-consuming, remain a considerable factor.
