Company says advanced modular units could be online in first half of 2030s
Sweden-based advanced nuclear technology company has Blykalla has submitted the first-ever application to the Swedish government to build the nation’s first commercial advanced nuclear reactor park in Norrsundet, Gävle municipality, two hours north of Stockholm.
The proposed facility in southeast Sweden will feature six of Blykalla’s lead-cooled Sealer advanced modular reactors (AMRs) generating 330 MW of clean baseload power, the company said.
The Swedish government review of Blykalla’s application marks the start of a comprehensive approval process involving multiple agencies, including the Land and Environmental Court and Swedish Radiation Safety Authority. Municipal approval from the municipality of Gävle is also required.
Subject to the permits and final investment decisions, the facility could become operational in the first half of the 2030s.
Blykalla said the nuclear reactor park would establish Sweden as a leader in commercialising advanced nuclear power.
The company said the timing is critical. “Europe faces mounting pressure to power its digital economy while maintaining energy independence and meeting climate goals.
Advanced Nuclear ‘Is The Solution’
“Alongside renewable sources, Sweden needs to build the consistent baseload power that modern industry demands, and advanced nuclear is the solution,” Blykalla said.
Blykalla chose Norrsundet as the location for its nuclear facility due to its location between two bidding zones, an existing port, key infrastructure, and industrial heritage. The company said the location means it can reduce construction complexity while addressing regional power shortages with predictable baseload power.
“This application is a historic first for Sweden,” said Blykalla’s CEO Jacob Stedman.
“We’re not just planning an advanced reactor park – we’re building Sweden’s energy future and putting the country at the forefront of the global nuclear power renaissance.”
Stedman said building new energy infrastructure is critical, and the energy systems of the future need to be predictable, reliable and fossil-free.
“As AI and electrification grow worldwide, we need to accelerate the deployment of predictable, clean baseload power,” he said. “That’s exactly what Blykalla’s technology does, and we are uniquely positioned to meet this moment.”
Blykalla also said it is Blykalla is expanding its operations to the US, bringing its lead-cooled reactor technology to a new market that is experiencing tremendous demand for power, driven in part by AI data centres.
Blykalla has partnered with US nuclear technology company Oklo to support technical works relevant to Oklo’s reactor pilot project, including neutronics and thermohydraulics analyses. This collaboration will help Oklo accelerate its technology development, while enabling Blykalla to advance its reactor deployment capabilities.
Blykalla has been working on two key projects – constructing an electric non-nuclear prototype test reactor at Oskarshamn in Sweden and developing a flagship advanced reactor design demonstrator called Sealer-One.
The Sealer-One prototype will help it towards the ultimate goal of production of its 55-MW Sealer-55 lead-cooled reactor.
Lead-cooled nuclear plants are not yet operating, but are being developed as next-generation, or Generation IV, reactors.
Last year Blykalla raised $50m (€42m) of fresh capital to accelerate its work.
Sweden’s Change Of Heart On Nuclear
Sweden has six large-scale reactor units in commercial operation at three sites: Forsmark, Oskarshamn and Ringhals. According to International Atomic Energy Agency data, nuclear energy provided 29% of the country’s electricity generation in 2024.
Sweden’s current centre-right government made new nuclear power one of its key pledges during campaigning for a general election in 2022. The move reverses a decades-long policy to shut down the country’s ageing reactors and replacing them with renewable energy. Sweden previously operated 12 commercial reactors, but permanently shut down six due to economic factors and shifting political goals.
The government wants to attract more players to build new nuclear in the country by streamlining its licensing process and opening up its coastline to build capacity in the sector.
In May 2025, Sweden passed a law establishing a state aid framework including government-backed loans and two-way contracts for difference for companies planning to build nuclear reactors, covering projects with a total capacity of up to 5,000 MW.
State-controlled utility Vattenfall has requested state financing to build small modular reactors (SMRs) near the existing Ringhals nuclear power station. Sweden-based SMR project development company Kärnfull Next has submitted an application for an SMR project in the south of the country.
A rendering of a Blykalla advanced nuclear power plant. Courtesy Blykalla.
