Another session is planned next week, the Islamic Republic News Agency reported.
Delegations from Iran and the International Atomic Energy Agency discussed technical details of Iran's P1 and P2 centrifuges. Mohammed ElBaradei, the head of the IAEA, is expected to issue a report on the Iranian nuclear program in November.
Iranian officials contend that their program is aimed entirely at power production. The United States and other countries contend its real aim is to give Iran nuclear weapons capability.