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U.S. Backs South Korean Nuclear Submarines as Navy Chief Signals Role Against China

The fact sheet conditions any nuclear and fuel‑cycle steps on the U.S.–ROK 123 agreement and U.S. law.

Overview

  • Adm. Daryl Caudle said it is a natural expectation that South Korea’s planned nuclear-powered attack submarines would help counter China and operate beyond a purely regional role.
  • A joint White House fact sheet records U.S. support for Seoul’s pursuit of nuclear-powered submarines and for procedures that could lead to civil uranium enrichment and spent-fuel reprocessing for peaceful uses, subject to legal requirements.
  • Experts and officials caution that enabling enrichment, reprocessing and naval reactor fuel will likely require revising the nuclear cooperation agreement, interagency and international reviews, and probable congressional scrutiny.
  • People familiar with ongoing talks say Korean-led joint production of submarines at sites in both countries is under discussion, including a potential role for Hanwha’s Philadelphia yard, though key decisions and sequencing remain unresolved.
  • The broader package includes a $350 billion Korean investment pledge in the U.S., with about $150 billion for shipbuilding tied to tariff cuts to 15 percent, as both sides explore ways to expand industrial capacity and navigate constraints such as the Jones Act.