South Korea's Defense Ministry announced plans Tuesday to lobby the National Assembly for a special act enabling the domestic construction of nuclear-powered submarines, a move aimed at bolstering the nation's maritime deterrence amid escalating threats from North Korea. The proposal, detailed in a ministry briefing, would amend existing laws restricting nuclear propulsion technology, allowing Seoul to pursue indigenous development of advanced submarines capable of extended underwater operations without surfacing for refueling.
The push comes as South Korea accelerates its naval modernization under the 2023-2027 Defense Mid-Term Plan, which allocates significant funding for submarine capabilities. Officials revealed that the ministry envisions a fleet of nuclear-powered attack submarines (SSNs) by the 2030s, complementing the current fleet of 18 diesel-electric KSS-series boats. "Nuclear propulsion will provide unmatched stealth and endurance, essential for countering the North's ballistic missile submarines," Defense Minister Shin Won-sik stated during the briefing, emphasizing the strategic necessity in the face of Pyongyang's recent hypersonic missile tests.
Historically, South Korea has relied on U.S. extended deterrence, including nuclear umbrellas, but growing self-reliance sentiments have fueled ambitions for nuclear submarines. While the country adheres to the Nuclear Non-Proliferation Treaty (NPT), nuclear-powered subs use highly enriched uranium for reactors, not weapons-grade material, sidestepping proliferation concerns. However, past U.S. opposition—citing technology transfer risks—has stalled progress, though recent trilateral summits with Washington and Tokyo signal thawing attitudes amid shared worries over China's naval expansion.
The special law would streamline procurement, R&D funding, and international cooperation, potentially involving partnerships with allies like the U.S. or Australia under the AUKUS framework. Critics, including opposition lawmakers, warn of diplomatic fallout and ballooning costs estimated at over 10 trillion won ($7.5 billion). Progressive Democratic Party leader Lee Jae-myung called it "a provocative escalation," urging dialogue with the North instead. Security experts, however, applaud the initiative, with the Korea Institute for Defense Analyses projecting that SSNs could shift regional power dynamics by enabling persistent surveillance of North Korean waters.
As the bill heads to parliamentary committees, its passage hinges on the conservative administration's majority and public support, buoyed by polls showing 65% favoring stronger defenses. Success could mark a pivotal step in South Korea's transformation into a proactive defense powerhouse, reshaping Northeast Asian security calculations for decades to come.
