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Seoul Sets Mid-to-Late 2030s Target for Nuclear Submarine After U.S. Green Light

U.S. approval enables fuel consultations under a bilateral nuclear pact that restricts South Korea’s reprocessing options.

Overview

  • A senior defense official said the lead vessel could launch in the mid-to-late 2030s if reactor fuel is secured through talks with Washington and construction begins in the late 2020s.
  • U.S. Defense Secretary Pete Hegseth reaffirmed President Trump's approval and pledged coordination with the State and Energy departments.
  • Seoul plans an interagency task force, with officials saying core reactor and weapons systems technologies are secured and safety verification is in progress.
  • Trump suggested building at Hanwha’s Philadelphia Shipyard, yet analysts note the yard lacks submarine-specific infrastructure and clearances, warning U.S. processes and upgrades could add about ten years.
  • Defense Minister Ahn Gyu-back said decisions on location and construction remain under negotiation and reiterated South Korea will not seek nuclear arms as experts flag broader regional escalation risks.