The future of nuclear-powered ships
Page date: Published 11 Dec 2024; updated 25 Mar 2026. 3 min read.
The article explains shipboard nuclear propulsion: fission heats a coolant, which produces steam to drive a turbine and generate electricity or mechanical propulsion. It describes pressurized-water reactors as the common design and mentions molten-salt and pebble-bed concepts as newer designs. The page says nuclear fuel can support operation for years between refuelling.
It reports that only four commercial nuclear-powered ships had been built, citing the 1959 NS Savannah and later German, Japanese and Russian vessels. The article attributes limited adoption to operating costs, regulation and public concerns. It says companies including TerraPower and Newcleo were exploring next-generation reactor applications for ships; these are developments reported at publication time, not proof of commercial cargo-ship deployment.
Potential benefits discussed include no direct operational greenhouse-gas emissions, long range and reduced dependence on fossil fuels. Barriers include high upfront and maintenance costs, port infrastructure for refuelling and waste, complex international rules, public acceptance and management of spent fuel. The article frames nuclear propulsion as a potential option for decarbonizing long-haul shipping, with mainstream use dependent on resolving those issues.
Related link: Maritime; IMO greenhouse-gas strategy.