June 24 (Reuters) - European Union foreign policy chief Josep Borrell will travel to Iran on Friday to try to urge Tehran to seal an agreement to revive the nuclear deal with world powers signed in 2015 that the United States withdrew from but is now seeking to save.

Called the Joint Comprehensive Plan of Action (JCPOA) and struck by Iran and six major powers, Tehran limited its nuclear program to make it harder for it to get a bomb in exchange for relief from economic sanctions.