Building Europe's first advanced SMR

Developing Sweden's next nuclear energy

Criticality by 2029

We work toward a future with 100% clean energy

We work toward a future with 100% clean energy. Currently, the world is dependent on carbon-based baseload energy. That is why our goal is to construct and deploy 1 000 SMRs. Together they will produce close to 500 TWh clean electricity annually. If successful, we will avoid 0.5 gigatons of C02 - or 1% of global emissions - every year.
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Our lead-cooled fast reactors (LFRs) will be used for electricity, heating, and industrial applications such as production of hydrogen, HVO, syngas, and biochar. By targeting otherwise hard-to-abate sectors we contribute to decarbonization throughout the industrial value chain.

Our history

Blykalla AB was founded in 2013 by Janne Wallenius, Peter Szakalos, and Jesper Ejenstam as a spin-off from the Royal Institute of Technology in Stockholm, Sweden, where Janne Wallenius has carried out research on design and safety analysis on lead-cooled reactor systems since 1996.

The research brought together insights from fast reactor design, transient analysis, corrosion and materials science, nuclear fuel development, lead coolant chemistry, radiation damage, severe accident analysis, nuclear construction, and operation of nuclear power plants to create a unique reactor design that provides safe and sustainable baseload energy.

Accelerating the industry

Blykalla is at the forefront of Sweden’s nuclear energy future, bringing together key stakeholders, including policymakers, industry leaders, and technical experts, to drive discussions on the role of advanced nuclear power in a sustainable energy system. As the host of industry-wide events, we create platforms for collaboration and progress in nuclear innovation.

In February 2025, we hosted a groundbreaking event to mark the beginning of our testing facility at the at the OKG nuclear power plant in Oskarshamn, Sweden, together with Sweden’s Deputy Prime Minister and Minister for Business, Energy, and Industry Ebba Busch.

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I’m incredibly happy to be here and have these interesting discussions about the role of nuclear power in tackling the climate transition. I’m particularly grateful to Blykalla for choosing to be a frontrunner in developing tomorrow’s nuclear power technology. That’s truly a climate hero in my eyes.

Romina Pourmokhtari
Minister for Climate and the Environment

Led by nuclear engineering experts and seasoned company builders

Janne Wallenius
CTO, Co-founder
Peter Szakalos
CRO, Co-founder
Jacob Stedman
CEO
Mikael Fraenkel
CFO
Merja Pukari
COO
Thérèse Burman
Head of Legal

Milestones

On our way to reach criticality by 2029

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“As a healthcare provider, protecting our patients' sensitive information is of the utmost importance to us. Devsonic has been instrumental in helping us meet our regulatory obligations and keeping our patients' data safe. The platform is easy to use and the support team is highly responsive and knowledgeable.”
“As a healthcare provider, protecting our patients' sensitive information is of the utmost importance to us. Devsonic has been instrumental in helping us meet our regulatory obligations and keeping our patients' data safe. The platform is easy to use and the support team is highly responsive and knowledgeable.”
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111 34 StockholmStockholm, Sweden
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