The Nuclear Regulatory Commission approved NuScale Power’s US460 standard design on May 29, granting the company’s second design approval and the first for its uprated 77 MWe per-module configuration. A standard six-module US460 plant delivers 462 MWe total. The review was completed in under two years, ahead of schedule and under budget. Standard design approval means any future utility or developer seeking to build a US460 plant can reference the approved design directly in a combined license application without triggering a second full safety review.
NuScale’s original 50 MWe design received the NRC’s first-ever SMR standard design approval in 2020. The US460 uprate is the result of engineering work to extract more thermal output from the same basic passive-safety architecture. The uprated configuration materially changes the project economics per site: 462 MWe per plant pushes the US460 into a size range that competes with conventional combined-cycle gas turbines on a per-project basis, not just as a small supplement.
The UAMPS Carbon Free Power Project cancellation in November 2023 removed NuScale’s most visible near-term deployment reference, and the company has been building a new customer pipeline since then. The US460 SDA is the licensing asset that makes that pipeline credible: customers can begin site-specific engineering and combined license work immediately, with no additional generic safety questions to resolve. The practical impact on project timelines, relative to competitors without an SDA in hand, is measured in years.