South Korea clears a procurement hurdle for nuclear-powered submarines
South Korea approved the acquisition strategy for its Jang Bogo N nuclear-powered submarine programme on November 6, waiving the usual feasibility study while retaining a separate assessment. Development is targeted to begin in 2027, with deployment envisaged for the late 2030s or later. Domestic shipbuilders will compete for the main contract, while the government will supply key components separately.
Geopolitics··Midday
Development is planned to begin in 2027
South Korea approved the basic acquisition strategy for Jang Bogo N, its domestic nuclear-powered submarine programme, on November 6. The Defense Acquisition Program Administration (DAPA), the country’s arms procurement agency, announced the decision after the 179th meeting of the committee overseeing defence acquisition programmes. The programme is also known as KSS-III Batch-III. Development is intended to begin in 2027, with operational deployment targeted for the late 2030s or later.[1], [2]
The agency waived the feasibility study normally required for major weapons programmes, using provisions for highly classified defence projects. That review usually takes one to two years. A separate in-depth assessment will still take place. The decision advances preparations for development while setting a different assessment route for the project.[1]
Domestic yards will compete for the main contract
DAPA plans competitive bidding among domestic shipbuilders for the main contract. It said local yards had demonstrated sufficient experience in submarine design and construction to justify competition. The government will develop or acquire key components separately, including the small modular reactor for propulsion and certain missile systems, and provide them to the selected shipbuilder. The overall project cost remains undisclosed under the programme’s security rules.[1]
Seoul links the programme to North Korean threats
The procurement agency presents longer submerged endurance and improved mobility as central objectives, linking the programme to deterrence against North Korea’s nuclear and missile threats. Nuclear-powered vessels can remain underwater for longer missions than diesel-electric submarines, which must recharge their batteries. South Korea presented its development roadmap in May, after United States approval of the project’s ambitions in 2025; the allies have also discussed arrangements for nuclear fuel.[1]
Separate teams at the defence ministry and procurement agency are preparing policy and industrial work. The ministry’s team coordinates acquisition policy with other institutions, including the foreign ministry, while the agency’s project team covers design, construction and core technologies. News1 describes a possible first launch in the middle of the 2030s, ahead of later operational deployment. Official vessel numbers and detailed specifications have not been disclosed.[2]
The programme gained momentum after the South Korean and US presidents discussed it at their October 2025 summit. The acquisition agency describes domestic research and development as its chosen route to obtaining the vessels; it links the project to strengthening South Korea’s own defence capabilities.[2]
