South Korea plans to develop and launch its first domestically built nuclear-powered attack submarine by the mid-2030s [1].
This strategic shift aims to neutralize the growing threat of North Korean missile-submarines. By enhancing its underwater kill-chain capabilities, Seoul intends to establish a more robust deterrent against regional aggression.
Defense Minister Ahn Gyu-back said the government will develop these attack submarines using low-enriched uranium fuel [1]. The program represents a significant leap in naval technology for the Republic of Korea, moving away from conventional diesel-electric propulsion to nuclear power.
A South Korean defense spokesperson said the nuclear submarines will be developed and constructed entirely within the Republic of Korea [2]. This domestic focus ensures that the technical specifications and operational capabilities remain under national control.
There are slight variations in the projected timeline for the first vessel. While several reports target a launch in the mid-2030s [1], other reports suggest the deployment may occur by the late 2030s [3].
"We will develop domestically built nuclear-powered attack submarines fueled by low-enriched uranium," Ahn said [1].
The initiative is designed to provide the South Korean navy with longer endurance and higher speeds than conventional submarines. These capabilities are seen as essential for monitoring and countering the underwater activities of North Korea, which continues to expand its own submarine fleet.
“The nuclear submarines will be developed and constructed entirely within the Republic of Korea.”
The pursuit of nuclear-powered submarines signals a major escalation in South Korea's naval strategy. Unlike conventional boats that must surface or snorkel frequently, nuclear propulsion allows vessels to remain submerged for months, providing a stealthier and more persistent deterrent. This move may complicate diplomatic relations regarding nuclear non-proliferation, as the use of enriched uranium for propulsion often draws international scrutiny.
