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U.S. Backs South Korean Nuclear Submarine Build, With Production Planned in Philadelphia

Further talks will determine fuel transfers as well as compliance with U.S. export controls.

Overview

  • President Donald Trump announced the approval on Truth Social and described the alliance as stronger than ever.
  • South Korean President Lee Jae Myung requested reactor fuel during their meeting, and national security adviser Wi Sung-lac said Trump agreed in principle but sought additional negotiations.
  • Supplying submarine fuel is politically sensitive because nuclear propulsion often relies on highly enriched uranium that is also usable for weapons.
  • The step is presented as part of a broader regional strategy that elevates South Korea and Japan as a counterweight to China.
  • Trump said Seoul would pay $350 billion to secure lower U.S. tariffs, while South Korean officials described $200 billion in cash with the remainder for joint shipbuilding projects, and Trump cited roughly $600 billion in additional private investments.