IAEA Warns of Unresolved Questions at Iran’s Isfahan Enrichment Plant

The International Atomic Energy Agency has raised fresh concerns about Iran’s refusal to allow verification work at its Isfahan Fuel Enrichment Plant. A confidential quarterly report disclosed on November 13 says the agency still lacks the information and access needed to establish that Iranian nuclear material has remained in peaceful activities. Iran declared the Isfahan facility in June 2025, but the agency does not know its precise location or whether nuclear material is present there. It has been unable to examine the plant’s design information, inspect it or independently assess whether it is operating. IAEA Director General Rafael Mariano Grossi described Iran’s continuing refusal to address longstanding safeguards questions as undermining international oversight. The agency also cannot independently establish the current location and status of Iran’s enriched uranium stockpile. Before Israeli and U.S. attacks in June 2025, it estimated that Iran held 440.9 kilograms of uranium enriched to 60 percent. Weapons-grade enrichment is generally around 90 percent. Inspectors have not independently verified the stockpile’s current size, composition or whereabouts. Grossi has urged Iran to supply information and access under its Nuclear Non-Proliferation Treaty obligations. The agency says those safeguards obligations remain in force, and that restoring access and accounting for the enriched material are essential.