Iran's Atomic Energy Organisation

Iran's Atomic Energy Organisation (AEOI) is the government body established in 1974 that administers all of Iran's civilian nuclear activities. It operates Iran's major nuclear facilities including Natanz (centrifuge enrichment, declared capacity), Fordow (buried enrichment site, hardened against airstrikes), and the Bushehr Nuclear Power Plant. Under the 2015 JCPOA, the AEOI was required to cap enrichment at 3.67% and reduce the number of operating centrifuges; following the US withdrawal from the deal in 2018, the AEOI progressively broke each cap, reaching 60% enrichment by 2023, against a weapons-grade threshold of 90%. Its head since 2024 is Mohammad Eslami. Its dual mandate of civilian nuclear power and an enrichment programme with lasting strategic ambiguity makes it the key institution in any arms-control negotiation: its technical assessments shape IAEA reporting, and its cooperation, or lack of it, determines whether verification is possible.

The AEOI sits at the centre of the conflict's hardest diplomatic knot. Eslami publicly declared that demands to restrict enrichment 'will be buried', directly countering Trump's Truth Social post ruling out any enrichment, in the hours before formal US-Iran talks opened in Islamabad. Iran's accepted 10-point negotiating framework explicitly preserves enrichment rights, making the AEOI's position the de facto Iranian red line entering talks. Any deal that does not address the AEOI's enrichment capacity is, in practical terms, no deal at all.

The organisation's public posture hardened further on 19 July 2026, when it said a strike had hit the unfinished Darkhovin nuclear power plant in Khuzestan province and called it a violation of international law. It is the second unconfirmed AEOI nuclear-site allegation inside ten days, after a 9 July claim regarding Bushehr that Rafael Grossi also declined to corroborate. The following day, 20 July, the IAEA said it was looking into the Darkhovin reports and found no radiological risk because the construction site held no nuclear material.