Iran notified the International Atomic Energy Agency about the Isfahan Fuel Enrichment Plant shortly before military strikes targeted its nuclear infrastructure. Following the outbreak of conflict, Tehran restricted international monitors, leaving the agency unaware of the new plant's exact location or current contents. Before the strikes, Iran had accumulated roughly 441kg of uranium enriched to 60%, with much of it believed to be housed at the Isfahan complex. While above-ground structures sustained major damage, the condition of the subterranean facilities remains entirely unverified.
Key points
Inspectors are currently unable to confirm the precise geographic location of the newly d…: Inspectors are currently unable to confirm the precise geographic location of the newly declared enrichment site.
Restrictions imposed by Tehran prevent international authorities from verifying whether h…: Restrictions imposed by Tehran prevent international authorities from verifying whether highly enriched nuclear material is secure or missing.
The nuclear watchdog warned that the ongoing inability to access these installations repr…: The nuclear watchdog warned that the ongoing inability to access these installations represents a serious and urgent proliferation threat.
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The UN's nuclear watchdog has said it is "increasingly concerned" about a nuclear facility in Iran which it has not been allowed to inspect.
Iran informed the International Atomic Energy Agency (IAEA) of plans to set up the uranium enrichment plant in the city of Isfahan a day before Israel began attacking its nuclear sites last June. The US joined the strikes later that month.
In a report seen by news agencies, the IAEA said it does not know the exact location or whether it contains nuclear material.
Since the start of the latest war, Iran has restricted IAEA inspectors' access to its nuclear sites, preventing the agency from verifying its enriched uranium stockpile.
Under a 2015 nuclear deal, Iran agreed to limit its enriched uranium stockpile to 300kg and enrichment to 3.67% purity. It subsequently exceeded both.
Before the June 2025 strikes, it had accumulated an estimated 441kg enriched to 60%, close to weapons grade.
The nuclear complex at Isfahan suffered extensive damage in US and Israeli strikes, particularly the parts above the ground. The condition of…
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