ABB has entered a memorandum of understanding (MoU) with Swedish nuclear energy firm Blykalla to expedite the introduction of lead-cooled small modular reactors (SMRs) in the maritime industry.

The MoU builds on a previous agreement signed in October 2024, focusing on the development of lead-cooled SMR technology for Sweden’s clean energy goals.

The expanded partnership comes as the maritime industry increasingly considers nuclear energy as a viable power source. The expanded partnership comes as the maritime industry increasingly considers nuclear energy as a viable power source.

In June, the administrations of the International Maritime Organization (IMO) at the Maritime Safety Committee (MSC 1102) endorsed recommendations to revise the Code of Safety for Nuclear Merchant Ships. This amendment aims to incorporate developments in nuclear technology, including SMRs, that have occurred since the Code was implemented.

Blykalla CEO Jacob Stedman 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. Realizing this vision will require an ecosystem of committed partners, and this collaboration is a critical building block.”

Blykalla’s Swedish Advanced Lead Reactor (SEALER) is a compact and passively safe reactor, designed with inherent safety features that eliminate the need for operator intervention.

SEALER was highlighted in the Nuclear Propulsion for Merchant Ships I (NuProShip I) project, which seeks to adapt a Generation IV SMR for maritime vessels, particularly larger ships.

ABB’s role in this partnership is crucial, leveraging its expertise in system integration, power distribution, control, and automation technologies to ensure the successful deployment of SMRs on ships.

ABB Marine and Ports President Juha Koskela said, “SMRs hold significant potential to drive decarbonization, 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 in shipping’s decarbonization journey.”