ABS evaluates nuclear propulsion for LNG carriers

Classification society ABS has released a study evaluating the feasibility and safety of nuclear propulsion for LNG carriers.PHOTO: ABS’ nuclear-propelled LNG carrier concept. ABS

The project assessed a small modular reactor on a standard LNG carrier, examining how a high-temperature gas-cooled reactor (HTGR) could impact the design, operation, and emissions of a 145,000 cbm LNG carrier model developed by ABS and marine engineering firm Herbert Engineering Corporation (HEC).

An HTGR is a type of nuclear reactor that uses helium as a coolant and operates at high temperatures for efficient electricity or hydrogen production.

The study showed that a nuclear-powered LNG carrier would have reactors at the rear, batteries in place of conventional fuel tanks, and a reinforced hull. Due to design constraints, HTGR technology is suited only for larger LNG carriers.

It also found that HTGR technology supports faster transit speeds and zero-emission operations without refuelling, though the reactor would need replacement every six years.

Findings from the study will give ABS and the industry critical insights on heat and energy management, shielding, weight distribution, and other design considerations for nuclear-propelled LNG carriers.

“While this technology is well understood on land, marine adaptation is still emerging. However, our study highlights its significant potential to address shipping’s emissions challenges and offer various operational advantages,” ABS' senior vice president Patrick Ryan said.

By Tuhin Roy

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