ABB has signed a memorandum of understanding (MoU) with Swedish nuclear energy company Blykalla to support and accelerate the deployment of small modular lead-cooled reactors to the maritime industry.
Building on the terms of an existing MoU between Blykalla and ABB signed in October 2024, which targets developing lead-cooled SMR technology to support Sweden’s clean energy requirements, this agreement expands the partnership and aligns with growing momentum for nuclear energy as a marine power source.
In June 2025, the IMO MSC 1102 approved recommendations to amend the Code of Safety for Nuclear Merchant Ships to account for advances in nuclear technology – including SMRs – since the Code entered into force.
Blykalla’s Swedish Advanced Lead Reactor (Sealer) is a compact, passively safe reactor said to have inherent safety structures not requiring any operator actions. It was one of three reactors identified in the Nuclear Propulsion for Merchant Ships I (NuProShip I) project, which aims to adapt a Generation IV SMR to the requirements of maritime vessels – in particular larger ships. ABB’s experience in system integration as well as power distribution, control, and automation technologies, is considered key to ensuring the successful deployment of the SMR as a shipboard solution.
Jacob Stedman, CEO Blykalla, said: “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, ABB Marine and Ports, added: “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.”
Image: ABB and Blykalla partner to advance nuclear reactor technology for the maritime industry (credit: Blykalla)
