The Natanz Nuclear Facility (Persian: تأسیسات هستهای نطنز), officially the Shahid Ahmadi Roshan Nuclear Facilities (Persian: تأسیسات هستهای شهید احمدی روشن), is one of the nuclear facilities in Iran, which was built near Natanz for uranium enrichment. This center is part of Iran's nuclear program. The underground enrichment facility of this center is protected by a concrete shield with a thickness of approximately 7.6 m (25 ft). According to the Iranian authorities, the gas centrifuges in this center were built 40–50 metres (130–160 ft) underground, for safety reasons. and also for being safe from "possible air attack". The existence of this nuclear center was first exposed in 2002 by the People's Mojahedin Organization of Iran. Under the 2015 Joint Comprehensive Plan of Action, Natanz was to be the only uranium enrichment site in Iran for 15 years, where it would enrich uranium up to 3.67%, under International Atomic Energy Agency (IAEA) safeguards including 24-hour monitoring. In June 2025, during the Twelve-Day War between Israel and Iran, the facility was bombed extensively by the Israeli Air Force. The above ground facility was said to have been partially destroyed during the strikes, according to IAEA chief Rafael Grossi. On 22 June 2025, the facility was bombed by the United States, using two heavy bunker busters dropped from a B-2 Spirit. On 2 March 2026, satellite images were made public which confirmed that the Natanz facility had sustained fresh damage in the 2026 Iran war. As of 3 March 2026, it is confirmed that while the core underground enrichment facility has not been destroyed, the significant damage to the entrance buildings at Natanz had made the facility inaccessible. On 21 March 2026, the U.S. conducted further strikes on the facility.
Naming In February 2012, with the presence of Mahmoud Ahmadinejad, the then-president of Iran, the names of 5 nuclear centers and departments of Iran were changed to the names of five assassinated people. Natanz Nuclear Facility name was changed to "Shahid Ahmadi Roshan Nuclear Facility" in memory of Mostafa Ahmadi Roshan, who was assassinated on 11 January 2012. Before that, the name of this nuclear facility was the same as the nearby city, Natanz. It is still known internationally with the name "Natanz Nuclear Facility".
Facilities The Fuel Enrichment Plant (FEP) covers 100,000 square meters that is built 8 meters underground and protected by a concrete wall 2.5 meters thick, itself protected by another concrete wall. In 2004, the roof was hardened with reinforced concrete and covered with 22 meters of earth. The complex has been described as being about three floors below ground, and consists of three underground buildings, two of which were built to house 50,000 centrifuges, about 14,000 of which are installed and about 11,000 are in operation, and six buildings above-ground, including two 25,000 square meter halls used for the assembly of gas centrifuges, as well as a number of administrative buildings. The Pilot Fuel Enrichment Plant (PFEP) is located within the complex which houses the FEP in a number of buildings above ground, and serves as a facility for research, development, testing and pilot enrichment. The facility began operation in 2003. It consists of one hall which is divided into a section for research and development and another for production, and can house 6 cascades of 164 centrifuges each. The PFEP is used by Iran to test new centrifuge designs. International Atomic Energy Agency (IAEA) reports have documented the presence of IR-1, IR-2m, IR-3, IR-4, IR-5, IR-6, and IR6s centrifuges in the facility, and as of November 2022 Iran was involved in testing IR-8, IR-8b and IR-9 centrifuges at the site. On March 3, 2026, the IAEA confirmed that the facility suffered significant damage in recent bombings, with areas such the facility's entrances suffering the most significant damage.
History
Acknowledgement, operations and expansion
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