GE Vernova's BWRX-300 Adds Darlington and Estonia Contracts as Fortum Seeks Swedish State Aid
Two BWRX-300 agreements covering 1,800 MW across Canada and Estonia add concrete orders to an SMR build-out still years from delivering capacity.
GE Vernova's BWRX-300 reactor design has agreements in place covering 1,800 MW across two separate projects, securities.io reported on Wednesday (2026-09-09). Canada's Darlington New Nuclear Project will deploy four units for a combined 1,200 MW by the mid-2030s, while Estonia has separately contracted for 600 MW of capacity. Both deals extend the BWRX-300's order book at a moment when the wider SMR sector is still working to convert signed agreements into commissioned megawatts.7
At Darlington, the concrete has arrived. A 953-tonne slab of steel and concrete was lowered into a 35-metre shaft at the Ontario site, which oilprice.com reported in June 2026 as the Western world's first grid-scale SMR breaking ground. Each of Darlington's four existing conventional reactors produces 935 MW individually; the four new BWRX-300 units would together match a comparable aggregate output in a fraction of the land area.3,7
In Finland, Helen, the Helsinki municipal utility, told Montel on Friday (2026-08-21) that combining heat and power production could halve SMR costs, with the company aiming to operate a reactor by 2039. Helen's CEO told Montel that treating the reactor as both a power source and a district-heating asset allows costs to be spread across two revenue streams. Finland's day-ahead power price stood at €75.49/MWh on Thursday (2026-09-10), a price environment that makes long-lived, low-fuel-cost baseload generation attractive to municipal buyers planning across decades.4
Fortum, whose operations span Finland and Sweden, filed a state aid application with the Swedish government on Thursday (2026-08-27) to open formal negotiations on the conditions needed to advance a new nuclear project. The eventual project could range from 1,200 MW to 3,400 MW depending on technology selection and demand forecasts, Fortum said. Sweden has shifted its electricity policy in recent years, dropping a "100% renewable by 2040" target in favour of a "100% fossil-free" goal, removing a legal obstacle that had effectively blocked new nuclear construction.5
The economics of the sector hinge on construction. About 70% of a nuclear plant's lifetime cost goes to the build phase, the Christian Science Monitor noted, and conventional large reactors have a poor record of delivering on schedule and within budget. SMRs use 5% to 10% of the land a full-scale plant requires, reducing site acquisition and permitting friction. But developers still need to show that factory-style serial manufacturing produces lower per-MWh costs in the field rather than in a financial model.6
GE Vernova's standing as an established power equipment supplier gives the BWRX-300 credibility that pure-play SMR startups lack. The company's broader generation portfolio produces roughly 25% of the world's total electricity, securities.io reported on Wednesday (2026-09-09), meaning utilities considering the reactor can work with a counterparty they already have commercial relationships with.7
Financial projections for the sector are large enough to invite scrutiny. Barclays forecast that net nuclear capacity outside China and Russia could exceed 450 GW by 2050, more than half above current levels, with SMRs accounting for 40% to 60% of new build and implying roughly $1 trillion in construction value, the Economist reported in May (2026-05-19). Bank of America put the total nuclear market opportunity at $10 trillion. SMR startups have raised more than $2 billion in private capital in the current investment cycle, the Economist added.2,1
Uranium equities gave back ground on Thursday (2026-09-10), with the URA exchange-traded fund falling 2.84% to $45.47. That sits awkwardly alongside the week's contract announcements but may reflect profit-taking in a sector that has run on forward expectations. Cameco produced roughly 17% of the world's uranium in 2024, second only to Kazakhstan's Kazatomprom at 21%, and its output trajectory will be closely followed as mid-2030s build timelines either hold or begin to slip.1
The European Commission published a roadmap in June 2026 projecting that European nuclear capacity would rise from 100 GW to as much as 145 GW by 2050, a figure the Fortum application and Estonia's BWRX-300 contract are now being counted against. Britain's government made the final investment decision to proceed with Sizewell C in July 2026, two large reactors estimated to cost over £38 billion ($51 billion), confirmation that utility-scale and modular paths are advancing alongside each other rather than competing for the same capital pool.2
Fortum's state aid negotiations with Stockholm carry no disclosed timetable, and the gap between 1,200 MW and 3,400 MW signals that key decisions on reactor count, technology selection, and financing structure remain unresolved. Darlington's mid-2030s completion target and Helen's 2039 date are the first real tests of whether contracts signed in this cycle survive contact with supply chains, regulators, and debt markets. If either slips materially, the capacity assumptions underpinning the sector's trillion-dollar market estimates will need fresh revision.5,4,7