Analysts: Fire at Iran nuke site hit new centrifuge facility

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DUBAI, United Arab Emirates (AP) – A fire and an explosion struck a building above Iran’s underground Natanz nuclear enrichment facility early on Thursday, a site that U.S.-based analysts identified as a new centrifuge production plant.

The Atomic Energy Organization of Iran sought to downplay the fire, calling it an “incident” that only affected an under-construction “industrial shed,” spokesman Behrouz Kamalvandi said. However, both Kamalvandi and Iranian nuclear chief Ali Akbar Salehi rushed after the fire to Natanz, which has been targeted in sabotage campaigns in the past.

Kamalvandi did not identify what damaged the building, though Natanz governor Ramazanali Ferdowsi said a “fire” struck the site, according to a report by the semiofficial Tasnim news agency.

A photograph later released by the atomic energy agency showed a brick building with scorch marks and its roof apparently destroyed. It wasn’t clear if that was the “shed” to which Kamalvandi referred. Debris on the ground and a door that looked blown off its hinges suggested an explosion accompanied the blaze.

Data collected by a U.S. National Oceanic and Atmospheric Administration satellite suggested the fire broke out around 2 a.m. local time in the northwest corner of the Natanz compound. Flames from the blaze were bright enough to be detected by the satellite from space.

“There are physical and financial damages and we are investigating to assess,” Kamalvandi told Iranian state television. “Furthermore, there has been no interruption in the work of the enrichment site. Thank God, the site is continuing its work as before.”

The site of the fire corresponds to a newly opened centrifuge production facility, said Fabian Hinz, a researcher at the James Martin Center for Nonproliferation Studies at the Middlebury Institute of International Studies in Monterey, California. He said he relied on satellite images and a state TV program on the facility to locate the building, which sits in Natanz’s northwest corner.

David Albright of the Institute for Science and International Security similarly said the fire struck the production facility. His institute previously wrote a report on the new plant, identifying it from satellite pictures while it was under construction and later built.

Iranian nuclear officials did not respond to a request for comment about the analysts’ comments.

There was no previously announced construction work at Natanz, a uranium enrichment center some 250 kilometers (155 miles) south of the capital, Tehran. Natanz includes underground facilities buried under some 7.6 meters (25 feet) of concrete, which offers protection from airstrikes.

Natanz, also known as the Pilot Fuel Enrichment Plant, is among the sites now monitored by the International Atomic Energy Agency after Iran’s 2015 nuclear deal with world powers.

The IAEA said in a statement it was aware of reports of the fire. “We currently anticipate no impact on the IAEA’s safeguards verification activities,” the Vienna-based agency said.

Located in Iran’s central Isfahan province, Natanz hosts the country’s main uranium enrichment facility. There, centrifuges rapidly spin uranium hexafluoride gas to enrich uranium. Currently, the IAEA says Iran enriches uranium to about 4.5% purity, above the terms of the nuclear deal, but far below weapons-grade levels of 90%. It also has conducted tests on advanced centrifuges, according to the IAEA.

The U.S. under President Donald Trump unilaterally withdrew from the nuclear deal in May 2018, setting up months of tensions between Tehran and Washington. Iran now is breaking all the production limits set by the deal, but still allows IAEA inspectors and cameras to watch its nuclear sites.

However, Natanz did become a point of controversy last year as Iranian officials refused to allow an IAEA inspector into the facility in October after allegedly testing positive for suspected traces of explosive nitrates. Nitrates are a common fertilizer. However, when mixed with proper amounts of fuel, the material can become an explosive as powerful as TNT. Swab tests, common at airports and other secure facilities, can detect its presence on the skin or objects.

Natanz also remains of particular concern to Tehran as it has been targeted for sabotage before. The Stuxnet computer virus, widely believed to be an American and Israeli creation, disrupted and destroyed centrifuges at Natanz amid the height of Western concerns over Iran’s nuclear program.

Satellite photos show an explosion last Friday that rattled Iran’s capital came from an area in its eastern mountains that analysts believe hides an underground tunnel system and missile production sites. Iran has blamed the blast on a gas leak in what it describes a “public area.”

Another explosion from a gas leak at a medical clinic in northern Tehran killed 19 people Tuesday.

Late Thursday, the BBC’s Persian service said it received an email prior to the announcement of the Natanz fire from a group identifying itself as the Cheetahs of the Homeland, claiming responsibility for an attack on the centrifuge production facility at Natanz. This group, which claimed to be dissident members of Iran’s security forces, had never been heard of before by Iran experts and the claim could not be immediately authenticated by the AP.

This photo released Thursday, July 2, 2020, by the Atomic Energy Organization of Iran, shows a building after it was damaged by a fire, at the Natanz uranium enrichment facility some 200 miles (322 kilometers) south of the capital Tehran, Iran. A fire burned the building above Iran’s underground Natanz nuclear enrichment facility, though officials say it did not affect its centrifuge operation or cause any release of radiation. The Atomic Energy Organization of Iran sought to downplay the fire Thursday, calling it an “incident” that only affected an “industrial shed.” (Atomic Energy Organization of Iran via AP)
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