Blykalla

Blykalla is a Stockholm-based nuclear energy company building Europe's first advanced small modular reactor (SMR). Founded in 2013 as a spin-off from the Royal Institute of Technology (KTH) in Stockholm, the company's technology is based on 25+ years of research into lead-cooled fast reactor systems. Its flagship product, SEALER-55, is a 55MW lead-cooled fast reactor (LFR) designed for modular factory production and deployment at industrial sites. The reactors target electricity generation, district heating, hydrogen production, and other hard-to-abate industrial applications. Blykalla raised an 80 mSEK funding round in 2024 led by Norrsken Launcher and Nucleation Capital. The company aims to begin serial production of SEALER-55 units in the early 2030s and deploy 1,000 units globally.