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Isfahan
Nation / PlaceIR

Isfahan

Iranian city; site of nuclear fuel conversion facilities, UNESCO heritage square, and wartime executions.

Last refreshed: 24 June 2026 · Appears in 1 active topic

Key Question

Is Isfahan's underground uranium stockpile still intact after the 2026 war?

Timeline for Isfahan

#14026 Jun
#13723 Jun

Bombed nuclear site still closed to inspectors

Iran Conflict 2026: Mentioned in: Trump claims inspections; Iran denies it
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Common Questions
Was Isfahan's nuclear facility destroyed in the Iran war?
The surface facilities at Isfahan's Nuclear Technology Centre were destroyed in June 2025 during the Twelve-Day War (Operation Rising Lion and Midnight Hammer), not in the February 2026 conflict. The underground vault holding roughly 200 kg of 60%-enriched uranium was sealed but not destroyed.Source: IAEA / ISIS five-month assessment
Is the 60% enriched uranium at Isfahan still there?
Yes. As of March 2026, IAEA Director General Grossi assessed approximately 200 kg of 60%-enriched uranium remains in Isfahan's underground storage vault. US strategy in June 2025 was access-denial (collapsing tunnel entrances) rather than destruction of the buried material.Source: IAEA / Arms Control Association
What is the Isfahan Nuclear Technology Centre?
The Isfahan Nuclear Technology Centre (UCF) converts uranium ore into uranium hexafluoride gas for use in centrifuge enrichment. Its surface buildings were destroyed in June 2025; underground storage remains intact but inaccessible to IAEA inspectors.Source: IAEA

Background

Isfahan (or Esfahan) is Iran's third-largest city (population 2.2 million) and the location of the Isfahan Nuclear Technology Centre (UCF), which converts uranium ore into hexafluoride gas for enrichment. Surface nuclear facilities were largely destroyed in June 2025: Israeli strikes on 14 and 20-21 June 2025 (Operation Rising Lion) damaged the enriched uranium metal conversion plant, the fuel rod plant, and associated laboratories. US Tomahawk Cruise Missiles on 22 June 2025 (Operation Midnight Hammer) collapsed all four tunnel entrances to the underground complex. The underground storage vault holding approximately 200 kg of 60%-enriched uranium was not destroyed; IAEA Director General Grossi assessed the stockpile as likely remaining at Isfahan on satellite imagery alone, with no inspector access since February 2026. On 23 June 2026, Trump claimed Iran had agreed to highest-level IAEA inspections; Iran's foreign ministry denied any such arrangement existed within hours, and Isfahan's bombed sites remain closed.

Beyond its nuclear role, Isfahan is a city of deep historical and cultural significance. Naqsh-e Jahan Square is a UNESCO World Heritage site and one of the great public spaces of the Islamic world. The province extends across a broad swathe of central Iran, some 340 km south of Tehran, encompassing heavy industry including Mobarakeh Steel. A 14 March 2026 strike on a civilian refrigerator factory killed 15 workers, illustrating how the campaign targeting military infrastructure also struck civilian industry in a city of cultural and symbolic importance.

Isfahani society has become an acute locus of Iran's wartime political repression. In January 2026 residents joined nationwide anti-war protests; multiple demonstrators were subsequently charged with moharebeh (waging war against God). On 30 April 2026, Sasan Azadvar, a 21-year-old karate champion from Isfahan, was executed at the city's Dastgerd Prison, the tenth protester executed during wartime. On 25 May 2026, Abbas Akbari Feyzabadi was executed in Isfahan province on moharebeh charges for his role in the January uprising, becoming the fifteenth person executed for January-uprising activity; his sentence was carried out before family notification. Amnesty International placed Iran's total 2026 executions above 200 by mid-May.

More questions
How far is Isfahan from Tehran?
Isfahan is approximately 340 km south of Tehran. It is Iran's third-largest city and a major industrial and defence-manufacturing hub, as well as a UNESCO World Heritage site.
Is Isfahan the same as Natanz?
No. Natanz is a separate facility roughly 150 km north of Isfahan, known for uranium enrichment centrifuges. Isfahan's Nuclear Technology Centre performs uranium conversion. Both sites had their surface facilities destroyed in June 2025; Fordow near Qom was struck separately by US bunker-busters in the same operation.Source: IAEA
What happened to Isfahan's nuclear facilities during the 2025 strikes?
Israeli and US strikes in June 2025 destroyed Isfahan's surface nuclear facilities, including the uranium conversion plant, but the underground vault holding roughly 200 kg of 60%-enriched uranium was sealed rather than destroyed. IAEA inspectors remain blocked from accessing it.Source: IAEA / Arms Control Association
Why are protesters from Isfahan being executed in Iran?
Demonstrators arrested during January 2026 anti-war protests in Isfahan face moharebeh charges (waging war against God) under the Islamic Penal Code, which carries a mandatory death penalty. Abbas Akbari Feyzabadi was executed on 25 May 2026 as the 15th person put to death for January-uprising activity.Source: IHRNGO / Amnesty International
Is Naqsh-e Jahan Square in Isfahan damaged?
The UNESCO World Heritage site itself was not directly struck. Strikes hit military depots and the nuclear complex on the outskirts of the city; a civilian refrigerator factory was hit on 14 March 2026 killing 15 workers.Source: UNESCO / Iranian state media
How much enriched uranium does Iran have hidden under Isfahan?
Approximately 200 kg of 60%-enriched uranium is stored in an underground vault beneath Isfahan. The tunnel portals were collapsed by US strikes in June 2025, but the stockpile was not destroyed. IAEA Director-General Grossi assessed in March 2026 that Iran retains a narrow access route.Source: IAEA / ISIS
Where is Iran's enriched uranium stockpile now?
The IAEA assesses on satellite imagery alone that the 440.9 kg stockpile is likely still at Isfahan's underground vault. Inspectors have had no access since February 2026, and the agency formally declared a loss of continuity of knowledge on 4 June 2026. The underground storage survived the 2025 strikes; US strategy was access-denial rather than destruction of the material.Source: IAEA Board of Governors, June 2026; IAEA Director General Grossi
What nuclear facility is at Isfahan?
Isfahan is the site of the Isfahan Nuclear Technology Centre, which converts uranium ore concentrate into uranium hexafluoride gas for enrichment at Natanz. Surface facilities were destroyed in June 2025 by Israeli and US strikes. The underground storage vault containing approximately 200 kg of 60%-enriched uranium survived.Source: IAEA safeguards reporting
Why is Isfahan significant in the Iran nuclear deal talks?
Isfahan's underground vault is the most likely location of Iran's 440.9 kg stockpile of 60%-enriched uranium, the central bargaining chip in Ceasefire negotiations. The Islamabad MOU signed 15 June 2026 requires the stockpile to be destroyed under IAEA supervision; Iran's supreme leader called that demand excessive and the site remained closed to inspectors as of 23 June.Source: Islamabad MOU; Lowdown reporting, June 2026
What happened to protesters in Isfahan during the 2026 war?
Isfahan was an acute site of wartime political repression. In January 2026, residents joined anti-war protests; multiple were charged with moharebeh (waging war against God). Sasan Azadvar, a 21-year-old karate champion, was executed at Isfahan's Dastgerd Prison on 30 April 2026, and Abbas Akbari Feyzabadi was executed in Isfahan province on 25 May 2026.Source: Iran Human Rights (IHRNGO); Lowdown reporting
Is Isfahan safe from further strikes?
Further military strikes on Isfahan are possible but not confirmed as of June 2026. The city has been struck multiple times: Israeli operations in June 2025 targeted nuclear and defence facilities, US Tomahawks collapsed uranium storage tunnels, and further blasts were reported in June 2026. The underground uranium vault survived all strikes.Source: Lowdown conflict reporting; IAEA monitoring
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