Iran's nuclear sites: What the US strikes hit and why they matter
The US military attacked three sites in Iran on Sunday -- Natanz, Isfahan and the mountain-buried Fordo, all key parts of Tehran's nuclear programme, which it maintains is purely for civilian purposes.
American planes launched a "very successful attack", US President
Donald Trump
said, claiming Iran's main nuclear enrichment facilities had been "completely and totally obliterated".
Trump has said Tehran must never get a nuclear weapon, and ally Israel has claimed its attacks on Iran have set back the country's nuclear weapons progress by several years.
Iran has always denied any ambition to develop nuclear weapons and maintained its right to a civilian nuclear programme.
Iran has significantly ramped up its nuclear programme in recent years, after a landmark deal with world powers curbing its nuclear activities in exchange for sanction relief began to unravel in 2018 when the United States under Trump unilaterally withdrew.
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As of mid-May, Iran's total enriched
uranium
stockpile was estimated at 9,247.6 kilograms -- or more than 45 times the limit set out in the 2015 deal -- according to the latest report by the International Atomic Energy Agency (IAEA).
Among its stockpiles, Iran has an estimated 408.6 kilograms (901 pounds) enriched to up to 60 percent -- just a short step from the 90 percent needed for a nuclear warhead.
The country now theoretically has enough near-weapons-grade material, if further refined, for about 10 nuclear bombs, according to the definition by the Vienna-based IAEA.
Below is a list of Iran's key nuclear sites, which are subject to regular inspections by the UN nuclear watchdog:
- Uranium enrichment plants -
NATANZ: About 250 kilometres (150 miles) south of Tehran, Natanz is Iran's heavily bunkered main uranium enrichment site, whose existence was first revealed in 2002.
Natanz operates nearly 70 cascades of centrifuges at its two enrichment plants, one of which is underground. A cascade is a series of centrifuges -- machines used in the process of enriching uranium.
In April 2021, the site was damaged in an attack that Iran said was an act of sabotage by Israel.
Israel said its recent strikes had hit the "heart of Iran's nuclear enrichment programme", targeting the atomic facility in Natanz and nuclear scientists.
IAEA head Rafael Grossi confirmed the Natanz site was "among targets".
FORDO: Secretly built in violation of
United Nations
resolutions under a mountain near the holy central city of Qom, Fordo was first publicly revealed in 2009.
Initially described as an "emergency" facility built underground to protect it from potential air attacks, Iran later indicated it was an enrichment plant capable of housing about 3,000 centrifuges.
In 2023, uranium particles enriched up to 83.7 percent were discovered at the Fordo plant, which Iran claimed were the product of "unintended fluctuations" during the enrichment process.
Trump has called it "the primary site".
- Uranium conversion and research reactors -
ISFAHAN: At the uranium conversion facility at Isfahan in central Iran, raw mined uranium is processed into uranium tetrafluoride (UF4) and then into uranium hexafluoride (UF6), a feed gas for centrifuges.
The plant was industrially tested in 2004 upon its completion.
The Isfahan centre also harbours a nuclear fuel fabrication facility, which was inaugurated in 2009 and produces low-enriched fuel for use in power plants.
In July 2022, Iran announced plans to construct a new research reactor there.
Four of its buildings have been hit by Israel since June 13, including a uranium conversion plant.
ARAK: Work on the Arak heavy-water research reactor on the outskirts of the village of Khondab began in the 2000s, but was halted under the terms of the 2015 deal.
Iran has meanwhile informed the IAEA about its plans to commission the reactor by 2026.
The research reactor was officially intended to produce plutonium for medical research and the site includes a production plant for heavy water.
TEHRAN: The Tehran nuclear research centre houses a reactor that was supplied by the United States in 1967 for the production of medical radioisotopes.
- Nuclear power plant -
BUSHEHR: Iran's only nuclear power plant in the southern port city of Bushehr was built by Russia and began operating at a lower capacity in 2011 before being plugged into the national power grid in 2012.
Russia continues to deliver nuclear fuel for the plant, which remains under IAEA control.
A German company began construction on the plant with a 1,000-megawatt nominal capacity until the project was halted in the wake of the 1979 Islamic revolution. Moscow later completed it.
DARKHOVIN AND SIRIK: Iran began construction in late 2022 on a 300-megawatt power plant in Darkhovin, in the country's southwest.
In early 2024, it also began work in Sirik, in the Strait of Hormuz, on a new complex of four individual plants with a combined capacity of 5,000 megawatts.
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