
(This Oct. 10 story has been refiled to clarify last inspection mentioned in quarterly report was on Sept. 6 (not Aug. 31), and the third IR-6 cascade had come online then.)
VIENNA (Reuters) - Iran is rapidly expanding its ability to enrich uranium with advanced centrifuges at its underground plant at Natanz and now intends to go further than previously planned, a confidential U.N. nuclear watchdog report seen by Reuters showed on Monday.