Korea Research Institute of Ships & Ocean Engineering (KRISO) on Thursday (16 July) received Approval in Principle (AiP) from the American Bureau of Shipping (ABS) for its concept design of a 15,000 TEU Small Modular Reactor (SMR)-powered container ship utilising Molten Salt Reactor (MSR) technology.

KRISO said the AiP recognises the technical feasibility and safety of its concept design, marking an important milestone toward the development of next-generation nuclear-powered commercial ships.

“This achievement demonstrates international recognition of KRISO’s technological capabilities in the rapidly evolving field of nuclear-powered shipping, supporting the transition toward low-carbon maritime transport,” it said. 

Building on this milestone, KRISO will continue advancing basic and detailed ship design, paving the way for future demonstration and commercialisation of SMR-powered vessels. 

Through continued R&D and international collaboration, KRISO remains committed to strengthening next-generation maritime technologies and contributing to the safe deployment of nuclear propulsion in the maritime industry.

Photo credit: Korea Research Institute of Ships & Ocean Engineering
Published: 21 July, 2026

A new joint study using the Port of Rotterdam as a case study has found that existing port safety and risk-management frameworks could provide a credible starting point for assessing nuclear-powered commercial ship calls within a major European port environment, according to Lloyd’s Register (LR) on Thursday (11 June). 

The desktop study, Enabling Nuclear-Powered Feeder Ships: A Joint Development Project on Port Call Feasibility and Regulatory Pathways, carried out through a joint development project involving LR, the Port of Rotterdam Authority, CORE POWER and A.P. Moller – Maersk, sets out the questions that ports, regulators and industry would need to answer in order to assess nuclear-powered vessels in a structured and responsible way. 

It also identified further work that would be required before routine operation could be contemplated, including regulatory alignment, emergency preparedness, security, liability and public engagement.

Its publication comes at a time of growing pressure on the shipping industry to identify even more scalable zero-emission technologies capable of meeting increasingly demanding decarbonisation requirements while preserving operational reliability, endurance and flexibility.

The report argued that maritime nuclear propulsion should be evaluated as part of the wider discussion around shipping decarbonisation, energy resilience and long-term industrial competitiveness.

While much of the current EU policy discussion has focused on alternative fuels such as hydrogen, ammonia and e-fuels, the report notes that segments of global shipping may ultimately require additional propulsion solutions capable of supporting endurance, reliability and operational flexibility at scale.

The Port of Rotterdam participated as a case study because it provides a real-world European port environment through which to examine how emerging energy and shipping technologies could interact with existing port safety frameworks, operations and regulatory processes.

Importantly, the study concluded that existing risk-based port safety frameworks already familiar to European ports could provide a credible starting point for assessing nuclear-powered vessels, provided nuclear-specific safety, security and operational considerations are systematically integrated and supported by appropriate national and international guidance.

The findings suggested that the real challenge for future maritime nuclear propulsion is likely to centre on regulatory alignment, governance, integration between nuclear and maritime safety regimes, and public and institutional preparedness.

The study identifies several key findings:

• Existing port safety and risk-management frameworks provide a credible starting point for the assessment of nuclear-powered commercial vessels within the defined case study scenario.
• Further work is needed on regulatory alignment, governance coordination, nuclear-specific safety and security, emergency preparedness, liability and insurance, operational integration and public engagement before routine commercial operation could be contemplated.
• Current IMO provisions relating to nuclear-powered ships were developed for an earlier era and require modernisation to support any future civil commercial nuclear propulsion pathway.
• Current European maritime decarbonisation discussions remain heavily focused on alternative fuels, with comparatively limited consideration of high-density, zero-emission propulsion systems capable of supporting long-range and high-utilisation shipping operations.
• Major ports and maritime Member States may play an important role in shaping how nuclear propulsion is assessed and potentially integrated into future shipping strategies.

Photo credit: Shaah Shahidh on Unsplash
Published: 16 June, 2026

Classification society Lloyd’s Register (LR) on Tuesday (2 June) said it has teamed up with South Korean shipbuilding, marine services and nuclear research organisations to advance the development of a nuclear‑assisted car carrier concept. 

LR is working with Hyundai Heavy Industries, Korea Shipbuilding & Offshore Engineering (KSOE), Hyundai Glovis, G- Marine Service and the Korea Atomic Energy Research Institute (KAERI) on a joint development project (JDP) exploring an advanced small modular reactor (SMR) installation on a pure car and truck carrier (PCTC). 

The study focused on how a Molten Salt Reactor (MSR) could be physically and operationally integrated into a large vehicle carrier. Work examined the internal arrangement and segregation of the reactor system, shielding requirements, and the impact on cargo deck layout and vehicle capacity, alongside stability and trim implications linked to the reactor’s weight and positioning. 

The partners also assessed propulsion system configuration and power delivery, as well as operational flexibility compared with conventionally fuelled PCTCs, where trade routes and port calls can be tightly constrained. 

A key focus of the project has been safety. LR led hazard identification (HAZID) and preliminary risk assessment work, focusing on containment, onboard safety systems and potential operability constraints tied to nuclear technology at sea. 

The partners will mark the project milestone with an Approval in Principle (AiP) granting ceremony on 2 June at the LR stand during Posidonia 2026. 

Sung-Gu Park, President – North East Asia, Lloyd’s Register, said: “While nuclear propulsion is still at an early stage of development, this project shows the importance of building technical understanding now to support future progress. 

“Establishing feasibility at concept stage is a valuable step forward, particularly in areas such as cargo optimisation, vessel stability and integrated safety design.” 

Hong-Ryeul Ryu, CTO and Senior Executive Vice President at HD HHI, said: “With global environmental regulations becoming increasingly stringent and no definitive net-zero fuel yet available, SMR-powered ships can serve as a highly effective alternative, representing a pioneering next-generation maritime technology capable of complying with GHG emission regulations while allowing lifetime operation without refuelling, and HD HHI will remain at the forefront of sustainable maritime technology development.”

Photo credit: Lloyd’s Register
Published: 4 June, 2026