The SEALER SMR
In October 2024, the two companies signed an initial MoU under which ABB agreed to explore how its automation, electrification, and digitalisation expertise could support Blykalla’s SEALER-E prototype, a lead-cooled electric reactor. That agreement also included cyber security frameworks to ensure alignment with nuclear safety regulations. The new MoU builds on this foundation, extending collaboration into maritime applications and reflecting the growing momentum for nuclear energy as a marine power source.
Blykalla highlighted ABB’s capabilities in system integration, power distribution, control, and automation technologies. The company stated: "ABB's expertise in system integration as well as power distribution, control, and automation technologies, will be key to ensuring the successful deployment of the SMR as a shipboard solution."
Blykalla CEO Jacob Stedman noted the importance of the expanded partnership: "We're pleased to extend our partnership with ABB into this strategically important vertical. With our compact reactor design, we see a unique opportunity to lead the way in maritime nuclear propulsion – a solution uniquely positioned to meet the sector's demand for clean energy. Realising this vision will require an ecosystem of committed partners, and this collaboration is a critical building block."
Juha Koskela, president of ABB’s Marine and Ports division, also expressed support for the cooperation: "SMRs hold significant potential to drive decarbonisation, and our collaboration with Blykalla will help to advance their viability in maritime applications. Next-generation SMRs will enable innovative ship designs that can help to reduce emissions compared to vessels powered by carbon-based fuels. We are proud to partner with Blykalla on what represents an important step on shipping's decarbonisation journey."
Blykalla, formerly known as LeadCold, is a spin-off from the KTH Royal Institute of Technology in Stockholm, where research on lead-cooled reactors has been ongoing since 1996. Established in 2013, the company is developing the SEALER (Swedish Advanced Lead Reactor). A demonstration unit, SEALER-D, is planned with a thermal output of 80 MW, while the first commercial SEALER-55 reactor with 140 MWt is targeted for the early 2030s.
Blykalla’s SEALER was also selected in the initial phase of Norway’s Nuclear Propulsion for Merchant Ships (NuProShip) project for further evaluation. The project is examining Generation IV SMR technologies for their potential in commercial shipping, especially for larger vessels. Its ultimate aim is to create a commercially viable, zero-emission propulsion system for deep-sea ships that meets industry needs without requiring long-term subsidies.
