South Korea has officially announced plans to develop and domestically build its first nuclear-powered attack submarine [1].
This move represents a significant shift in the peninsula's naval strategy. By moving away from diesel-electric propulsion, Seoul aims to increase its ability to covertly track North Korean submarine activity and establish a more effective underwater "kill chain" to deter aggression.
The announcement took place at the Jinhae Naval Submarine Command in Gyeongsangnam-do [1]. According to government officials, the first vessel in this new class is slated for commissioning in the mid-2030s [1].
Defense Minister An Gyu-baek emphasized the tactical advantages of nuclear propulsion over traditional diesel systems. He said nuclear-powered submarines can monitor and track North Korean submarine forces more stealthily and rapidly, which will contribute significantly to the implementation of the underwater kill chain [1].
The timing of the official development plan follows high-level diplomatic coordination. The announcement was made in 2024, approximately six months after the 2023 U.S.–ROK summit [1].
President Lee Jae-myung has framed the initiative as a step toward self-reliant peace and security [1]. The domestic production of these vessels is intended to reduce reliance on foreign technology and ensure that the South Korean navy can maintain a persistent presence in contested waters without the frequent surfacing required by diesel submarines.
This strategic expansion of the naval fleet is designed to counter the growing capabilities of North Korean underwater forces. The government said that a nuclear-powered fleet is the only way to achieve the endurance and speed necessary for constant surveillance [1].
“The first vessel is slated for commissioning in the mid-2030s.”
The transition to nuclear-powered submarines allows South Korea to maintain a permanent submerged presence, removing the 'snorkeling' vulnerability of diesel boats. This capability closes a critical gap in the regional security architecture, shifting the underwater balance of power in the East Sea and increasing the pressure on North Korea's naval strategy.
