Iran’s enriched uranium stockpile mostly remains in Isfahan, IAEA says

Most of Iran’s highly enriched uranium is likely still being stored at its nuclear facility in Isfahan, according to Rafael Grossi, the head of the International Atomic Energy Agency (IAEA).

Speaking to Associated Press, Grossi said the IAEA has been unable to carry out inspections at the site since the 2025 war, Caliber.Az reports.

He assessed that a significant portion of the material — including uranium enriched close to weapons-grade levels — remains there.

The IAEA chief noted that inspectors are currently unable to verify the status of the stockpile and stressed the need to restore access to Iran’s nuclear facilities.

Iran is a party to the Nuclear Nonproliferation Treaty, whose five-year review is underway at U.N. headquarters. Under its provisions, Iran is required to open its nuclear facilities to IAEA inspection.

The agency estimates that Iran has 440.9 kilograms (972 pounds) of uranium that is enriched up to 60% purity, a short, technical step from weapons-grade levels of 90%.

Grossi said the IAEA believes roughly 200 kilograms (about 440 pounds) is stored in tunnels at the Isfahan site.

By Bakhtiyar Abbasov