Full Breakdown
Iran’s Isfahan Nuclear Complex Still Holds Majority of HEU, IAEA Says
4/30/2026, 1:02:50 AM
Isfahan HEU Stockpile Remains Intact After Airstrikes
The International Atomic Energy Agency (IAEA) says Iran’s highly enriched uranium (HEU) remains stored at the Isfahan Nuclear Technology Center. Satellite images show a truck delivering 18 blue containers into a tunnel on 9 June 2025, just before the 12-day war that began that month. Inspections have not resumed since Israel’s June 2025 strikes and U.S. attacks.
Background & Context
Israel launched a 12-day campaign in June 2025 that targeted Iranian nuclear sites, including Isfahan. The United States joined, bombing three facilities. A lighter wave of strikes occurred during the 2026 U.S.–Israeli conflict, with no new IAEA access granted. Iran remains a party to the Nuclear Non-Proliferation Treaty, which obliges it to allow inspections. The ongoing five-year NPT review at the United Nations is underway.
Data & Statistics
Iran holds about 972 pounds (? 440.9 kg) of uranium enriched to 60 % U-235. The IAEA estimates roughly 440 pounds (? 200 kg) are stored in Isfahan’s tunnels, enough for up to ten nuclear weapons if fully weaponized. While 60 % enrichment is below the 90 % weapons-grade threshold, it is a short technical step toward a bomb.
Official Statements & Responses
IAEA Director General Rafael Grossi said inspections of Isfahan, Natanz and Fordo are required under the NPT and that agency is discussing removal or blending of the HEU with Russia and other partners. U.S. Secretary of State Marco Rubio stressed that preventing Iran from acquiring a nuclear weapon remains the core issue. Former President Donald Trump claimed the 2025 strikes “obliterated” Iran’s atomic program, a claim the IAEA does not confirm. Grossi also emphasized inspecting Natanz and Fordo, where additional nuclear material is believed present.
Criticism & Opposition
Trump’s assertion that the airstrikes destroyed Iran’s nuclear capability conflicts with satellite evidence indicating the HEU remains largely untouched. Trump framed the strikes as a means to deny Iran a nuclear weapon.
Conflicting Reports & Gaps
Estimates of HEU at Isfahan vary: one source cites 440 pounds, another 200 kilograms, while a third mentions 440.9 kilograms for the national stockpile. The IAEA has not verified whether the seals on the containers after the 2025 war remain intact.
Verbatim Quotes
- “we continue to get information.” — Rafael Grossi, IAEA Director General
- “inspect or to reject that the material is there,” — Rafael Grossi
- “What’s going to be important is that that material leaves Iran” — Rafael Grossi
- “ Secretary of State Marco Rubio told Fox News Channel this week that preventing Iran from attaining a nuclear weapon “remains the core issue” that must be confronted.” — Marco Rubio, U.S. Secretary of State
What’s Next
The IAEA intends to pursue a political deal, possibly with Russian involvement, to remove the HEU from Isfahan or blend it to lower enrichment. Any agreement must guarantee unrestricted inspections of Iranian nuclear sites. The five-year NPT review at the United Nations is underway. Grossi stressed that removal operation would require political will from Tehran.
