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Nuclear propulsion

Last updated: April 2026

Quick Facts

Type
Propulsion
Era
20th Century
Key Features
Use of nuclear reactors to power ships and submarines

Nuclear propulsion allows ships and submarines to operate for extended periods without refuelling. This capability is particularly valuable for submarines, enabling them to remain submerged for long durations. Nuclear-powered vessels offer high endurance, sustained speed, and strategic flexibility.

The adoption of nuclear propulsion required advanced engineering, safety measures, and specialised training. It also influenced naval strategy by enabling new forms of deterrence and global reach. Nuclear-powered submarines form a key part of modern naval forces, particularly in strategic deterrence roles.