A small manufacturer in Nyköping, Sweden has spent years paying industrial power prices that swing with the season. A reactor deal signed this September could finally give that manufacturer a steady, predictable number to plan around.
What Studsvik Signed, and Why Four Reactors Beat One
Studsvik moved its BWRX-300 reactor fleet plan from paper to partnership on September 3, signing an exclusive deal with GE Vernova Hitachi Nuclear Energy and Samsung C&T to build four BWRX-300 small modular reactors in southern Sweden. The agreement targets 1.2 gigawatts of new nuclear capacity, with the first unit online by the mid-2030s.
Most nuclear plants get built once, as custom projects. Each one repeats almost nothing from the last, and that drives up both costs and delays. Studsvik’s plan flips that model: build four identical BWRX-300 units back to back, so crews repeat the same design, catch mistakes early, and get faster with each build instead of relearning the process from scratch. Sweden isn’t starting from zero either. Ontario Power Generation is already building the first BWRX-300 at its Darlington site in Canada, with completion expected by the end of the decade, handing Sweden real construction data and operating lessons instead of just design drawings.
A Design That Skips the Pumps
The BWRX-300 generates 300 megawatts of electricity and cools itself through natural water circulation instead of powered pumps. Fewer moving parts mean fewer components that can fail, and passive safety systems keep the reactor stable without operator action or backup power. The design builds on GE Hitachi’s ESBWR reactor, inheriting years of licensing groundwork rather than starting the regulatory process cold.
Who Handles What, and Why a Local Manufacturer Should Care
Studsvik leads permitting, environmental review, site rights, and community engagement. GE Vernova Hitachi supplies the reactor design and licensing support. Samsung C&T takes single-point responsibility for engineering, procurement, and construction, the piece that turns a reactor design into a buildable project instead of a stalled concept. Other advanced reactor developers are racing to lock down similar supply chains: TerraPower recently added several new suppliers to keep its Natrium sodium-fast reactor on schedule.
For a factory owner near one of the candidate sites, a fleet of four identical reactors means a power source that’s cheaper to build and, in theory, cheaper to run than a single custom plant, the kind of steady industrial rate that’s hard to plan a business around when it’s tied to imported gas. A manufacturer whose energy bill swings by tens of thousands of kronor a month between a mild winter and a cold one has real money riding on trading that volatility for a fixed number.
What Happens Next
This deal isn’t a final investment decision, and no construction date exists yet. The partners are weighing two candidate sites: Nyköping, which already holds a nuclear license, and Valdemarsvik, which filed a new regulatory application back in March. Sweden’s Deputy Prime Minister and Energy Minister called the agreement “an important step” and proof that global nuclear companies want to build in Sweden again. That shift from paper to hardware is showing up across reactor sizes, not just SMRs: Westinghouse’s eVinci microreactor reached criticality for the first time earlier this year.
Watch which site, Nyköping or Valdemarsvik, gets picked first. If the project clears financing and site approval, it puts real steel behind Europe’s push for fleet-scale SMRs, and gives Sweden a repeatable nuclear build instead of another one-off megaproject.
Source: GE Vernova