Iran’s Centrifuges: The Long Road Towards a Nuclear Bomb

This photo released on Nov. 5, 2019, by the Atomic Energy Organization of Iran shows centrifuge machines in the Natanz uranium enrichment facility in central Iran. (Atomic Energy Organization of Iran via AP, File)
This photo released on Nov. 5, 2019, by the Atomic Energy Organization of Iran shows centrifuge machines in the Natanz uranium enrichment facility in central Iran. (Atomic Energy Organization of Iran via AP, File)
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Iran’s Centrifuges: The Long Road Towards a Nuclear Bomb

This photo released on Nov. 5, 2019, by the Atomic Energy Organization of Iran shows centrifuge machines in the Natanz uranium enrichment facility in central Iran. (Atomic Energy Organization of Iran via AP, File)
This photo released on Nov. 5, 2019, by the Atomic Energy Organization of Iran shows centrifuge machines in the Natanz uranium enrichment facility in central Iran. (Atomic Energy Organization of Iran via AP, File)

The UN nuclear agency has confirmed that Iran plans to install around 6,000 new centrifuges to enrich uranium, according to a report seen by AFP on Friday.

“Iran informed the Agency that it intended to feed” around 6,000 centrifuges at its sites in Fordo and Natanz to enrich uranium to up to five percent, higher than the 3.67 percent limit Tehran had agreed to in 2015.

The Iranian decision came in response to a resolution adopted on November 21 by the UN nuclear watchdog that censures Tehran for what the agency called lack of cooperation.

On Thursday, Iran had threatened to end its ban on acquiring nuclear weapons if Western sanctions are reimposed.

The country’s foreign minister, Abbas Araghchi, said in an interview that the nuclear debate inside Iran is likely to shift towards the possession of its own weapons if the west goes ahead with a threat to reimpose all UN sanctions,

What are centrifuges?

They are precise devices with cylinders that rotate much faster than the speed of sound, to collect enriched uranium atoms.

To explain how centrifugation works, rotating cylinders are much like medical laboratory equipment used to test blood.

The high rotation speeds exert a rotational force that separates the various components of blood as a function of their density and quantity in the sample.

In the case of uranium, the centrifuge operates using the familiar principle of centrifugal force. This force separates two gases of unequal masses in a spinning cylinder or tube. The heavier uranium-238 isotope collects at the outer edges of the cylinder while the lighter uranium-235 collects near the axis of rotation at the center.

Around 20 kg of uranium enriched to a 90% purity level would be needed for a single nuclear weapon. It would take about 1,500 SWU to produce a weapon-equivalent of 90 percent-enriched uranium from this enriched uranium.

At Fordo, Iran is currently using the two only operating cascades of IR-6 centrifuges there to enrich to 60% from 20%.

There are 1,044 centrifuges active at the Fordo uranium enrichment plant, Iran's President Masoud Pezeshkian said.

He had earlier asked the Iran Atomic Energy Agency to begin inserting uranium gas into newly activated advanced centrifuges.

Early this month, a spokesperson for the US State Department said Iran's expansion of uranium enrichment activities in defiance of key nuclear commitments is "a big step in the wrong direction”.

His statement came after Tehran announced it would start injecting uranium gas into centrifuges at Fordo.

Dispute

The Nuclear Non-Proliferation Treaty, signed in 2015 between Tehran and Western countries, says advanced centrifuges for uranium enrichment could operate until January 2027.

The difference between the first generation of centrifuges (IR-1) and the other generations is speed. The latest generation, IR-6, could enrich uranium up to 10 times faster than the first-generation IR-1, according to Iranian officials.

During the heyday of its nuclear program, Iran operated a total of 10,204 first-generation IR-1 centrifuges at the Natanz and Fordo facilities. But under the deal, Iran's commitments included operating no more than 5,060 IR-1 centrifuges for a period of 10 years.

Although the centrifuges that Iran installed before the 2015 nuclear deal were of the first generation, Tehran’s recent uranium enrichment activity at nuclear sites has reached disturbingly advanced levels, potentially increasing the nuclear proliferation risk.

Major centrifuge activities in Iran

May 2008: Iran installed several centrifuges including more modern models.

March 2012: Iranian media announced 3,000 centrifuges at Natanz.

August 2012: The International Atomic Energy Agency announced that Iran had installed large parts of the centrifuges at Fordo.

November 2012: An IAEA report confirmed that all advanced centrifuges had been installed at Fordo, although there were only four working centrifuges, and another four fully equipped, vacuum tested, and ready to go.

February 2013: IAEA says Iran has operated 12,699 IR-1 centrifuges at the Natanz site.

June 2018: Iran’s supreme leader revealed Tuesday that it ultimately wants 190,000 nuclear centrifuges — a figure 30 times higher than world powers allowed under the 2015 deal.

September 2019: Iran mounted 22 IR-4, one IR-5, 30 IR-6, and three IR-6 for testing, outside the treaty boundaries.

September 2019: Iran announced it started operating advanced and fast centrifuges to enrich uranium.

November 2024: Iranian Foreign Minister Abbas Araghchi announces that his country will operate several thousand advanced centrifuges.

November 2024: Iranian state television broadcasts AEOI Chief Mohammad Eslami announcing that “gasification of a few thousands of new generation centrifuges has been started.”



Bereaved Gazans Dig Out Bodies from City Ruins, Give Them Graves 

A Palestinian walks amid the rubble of buildings destroyed during the Israeli offensive, following a ceasefire between Israel and Hamas, in Rafah in the southern Gaza Strip, January 22, 2025. (Reuters)
A Palestinian walks amid the rubble of buildings destroyed during the Israeli offensive, following a ceasefire between Israel and Hamas, in Rafah in the southern Gaza Strip, January 22, 2025. (Reuters)
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Bereaved Gazans Dig Out Bodies from City Ruins, Give Them Graves 

A Palestinian walks amid the rubble of buildings destroyed during the Israeli offensive, following a ceasefire between Israel and Hamas, in Rafah in the southern Gaza Strip, January 22, 2025. (Reuters)
A Palestinian walks amid the rubble of buildings destroyed during the Israeli offensive, following a ceasefire between Israel and Hamas, in Rafah in the southern Gaza Strip, January 22, 2025. (Reuters)

Guns may have fallen silent in Gaza, but for Mahmoud Abu Dalfa, the agony is not over. He is desperately searching for the bodies of his wife and five children trapped under the rubble of his house since the early months of the war.

Abu Dalfa's wife and children were among 35 of his extended family who were killed when an Israeli airstrike hit the building in Gaza City's Shejaia suburb in December 2023, he said. As bombs continued to fall, only three bodies were retrieved.

"My children are still under the rubble. I am trying to get them out... The civil defense came, they tried, but the destruction makes it difficult. We don't have the equipment here to extract martyrs. We need excavators and a lot of technical tools," Abu Dalfa told Reuters.

"My wife was killed along with all my five children - three daughters and two sons. I had triplets," he said.

Burials are usually carried out within a few hours of death in Muslim and Arab communities, and failure to retrieve bodies and ensure dignified burials is agonizing for bereaved families.

"I hope I can bring them out and make them a grave. That's all I want from this entire world. I don’t want them to build me a house or give me anything else. All I want is a grave for them - to get them out and make them a grave," said Abu Dalfa.

The Palestinian Civil Emergency Service and medical staff have recovered around 200 bodies since the ceasefire between Hamas and Israel came into effect on Sunday, halting a 15-month conflict that has killed more than 47,000 Gazans.

The war in Gaza was triggered when Palestinian Hamas fighters attacked southern Israel on Oct. 7, 2023, killing 1,200 people and taking about 250 as hostages, according to Israeli tallies. At least 94 of those hostages remain in Gaza.

Mahmoud Basal, the head of the service, said extraction operations have been challenged by the lack of earth-moving and heavy machinery, adding that Israel had destroyed several of their vehicles and killed at least 100 of their staff.

Basal estimates the bodies of around 10,000 Palestinians killed in the war are yet to be found and buried.

A UN damage assessment released this month showed that clearing over 50 million tons of rubble left in the aftermath of Israel's bombardment could take 21 years and cost up to $1.2 billion.

OPENING AID CROSSINGS

As hundreds of truckloads of aid flowed into Gaza since Sunday, officials from the Palestinian Authority, rivals to Hamas, held meetings with European officials to arrange to assume responsibilities at two vital crossing points with Egypt and Israel.

A Palestinian official familiar with the matter said Egypt sent bulldozers and some engineering vehicles to carry out repairs to the road on the Gaza side of the border that had been damaged by Israel's ground offensive.

Like Abu Dalfa, thousands of Gaza's 2.3 million residents are searching for the bodies of relatives either missing under the rubble or buried in mass graves during Israeli ground raids.

Rabah Abulias, a 68-year-old father who lost his son Ashraf in an Israeli attack, wants to give his son a proper grave.

"I know where Ashraf is buried, but his body is with dozens of others, there is no grave for him, there is no tomb stone that carries his name," he said via a chat app from Gaza City.

"I want to make him a grave, where I can visit him, talk to him and tell him I am sorry I wasn't there for him."