World’s First Nuclear-Powered LNG Carrier Receives AiP At Gastech 2025

September 11th, 2025

Image Credits: kaeri

Korea Atomic Energy Research Institute (KAERI) and Samsung Heavy Industries (SHI) have taken the world’s first step toward nuclear-powered LNG shipping by securing Approval in Principle (AiP) for a carrier equipped with a small modular molten salt reactor (MSR). The announcement was made on September 9 at Gastech 2025, held in Milan, Italy.

The AiP, granted by the American Bureau of Shipping (ABS) with additional certification from the Liberian flag state, confirms that the design of the vessel meets international safety regulations and technical standards.

The MSR-powered LNG carrier, conceptually designed by KAERI and SHI, introduces nuclear technology as a propulsion option for commercial shipping. The molten salt reactor uses liquid nuclear fuel, created by mixing molten salt with nuclear fuel and coolant.

This design is drawing attention for its high level of safety and excellent energy efficiency compared to conventional systems, making it a strong candidate for future marine engines.

Conceptual diagram of a salt reactor system — Image Credits: kaeri

According to the developers, the MSR designed for LNG carrier propulsion will have a capacity of 100 megawatts thermal (MWth). One of the most notable features is that a single unit can power the vessel for its entire operational life without requiring any fuel replacement, a breakthrough that could drastically reduce operating costs and improve efficiency in long-haul shipping.

The announcement was made at Gastech, the world’s largest gas and energy exhibition, which runs from September 9 to 12. The event brings together global leaders from shipbuilding, shipping, and classification societies, making it an international stage for showcasing future energy and maritime technologies.

Meanwhile, KAERI and SHI are serving as lead institutions in the Molten Salt Reactor (MSR) Source and Innovation Technology Development Project.

This national project, supported by Korea’s Ministry of Science and ICT and the Ministry of Oceans and Fisheries since 2023, is focused on advancing nuclear innovation for marine use. The two institutions are working toward completing the conceptual design of a marine MSR by 2026.

Reference: kaeri

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