South Korea and the U.S. will resume talks to revise a restrictive bilateral nuclear energy treaty in Seoul on June 3. The talks will be the first round since the two countries agreed to extend the current treaty, which expires in March 2014, by two years while they try to iron out their differences.
Seoul has so far been unable to persuade the U.S. to let it reprocess nuclear fuel that is piling up in storage and produce low-enriched uranium for energy generation.
The U.S. is expected to replace its chief delegate. Robert Einhorn, the State Department's special advisor for nonproliferation and arms control, is retiring and will be replaced by Thomas Countryman, the assistant secretary of state for international security and nonproliferation.
A diplomatic source in Washington on Sunday said Einhorn will take up a post at the Brookings Institution.