A joint study involving ABS, Blossom Energy and a global shipping company has assessed the economic case for nuclear propulsion
A joint study involving ABS, Blossom Energy and a global shipping company has assessed the economic case for nuclear propulsion on LNG carriers, finding that a nuclear-powered vessel could significantly reduce fuel costs despite a substantially higher initial investment.
Presented at Gastech 2026, the study examined a 174,000-cbm LNG carrier fitted with a 20–25 MWe high-temperature gas-cooled reactor (HTGR) being developed by Blossom Energy. The analysis compared the vessel’s arrangement, propulsion system and operating conditions with those of a conventional LNG-fueled newbuild. It also assessed the economics under a range of potential regulatory penalty scenarios.
According to the study, the initial investment for the nuclear-powered LNG carrier would be approximately 2.5 times that of a conventional LNG carrier. However, the nuclear design could deliver substantially lower fuel costs over the vessel’s operating life.
ABS said the findings provide a quantitative basis for assessing the potential economic implications of nuclear propulsion in commercial shipping.
Nuclear energy has the potential to fundamentally change the economics of commercial shipping, from vessel design to long-term operating costs
… commented Patrick Ryan, ABS Senior Vice President and Chief Technology Officer.
Meanwhile, Blossom Energy CEO Shimpei Hamamoto said the study provides a basis for further discussion of nuclear propulsion in commercial shipping, while highlighting the need to develop the technical and regulatory framework for its application.
Reactor reuse could improve residual value
The study also examined a business model in which the reactor would be treated as a long-term energy asset rather than solely as part of the individual vessel.
Under the model, the reactor could potentially be reinstalled on a second vessel after the first LNG carrier reaches the end of its service life. The potential reuse of the reactor was factored into the vessel’s residual value and the overall economic assessment.
The findings come as the shipping industry continues to examine alternative propulsion technologies capable of reducing fuel consumption and exposure to future regulatory costs, while questions around the safety, regulation and infrastructure requirements for commercial nuclear propulsion remain.
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