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.”



Sudan Banknote Switch Causes Cash Crunch

A Sudanese man pushes a cart with water containers in Omdurman, the Sudanese capital's twin city, during battles between the Sudanese military forces and Rapid Support Forces (RSF), on January 17, 2025. (Photo by AFP)
A Sudanese man pushes a cart with water containers in Omdurman, the Sudanese capital's twin city, during battles between the Sudanese military forces and Rapid Support Forces (RSF), on January 17, 2025. (Photo by AFP)
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Sudan Banknote Switch Causes Cash Crunch

A Sudanese man pushes a cart with water containers in Omdurman, the Sudanese capital's twin city, during battles between the Sudanese military forces and Rapid Support Forces (RSF), on January 17, 2025. (Photo by AFP)
A Sudanese man pushes a cart with water containers in Omdurman, the Sudanese capital's twin city, during battles between the Sudanese military forces and Rapid Support Forces (RSF), on January 17, 2025. (Photo by AFP)

Sudan's army-aligned government has issued new banknotes in areas it controls, causing long queues at banks, disrupting trade and entrenching division.

In a country already grappling with war and famine, the swap replaced 500 and 1,000 Sudanese pound banknotes (worth around $0.25 and $0.50 respectively) with new ones in seven states.

The government justified the move as necessary to "protect the national economy and combat criminal counterfeiters,” AFP reported.

But for many Sudanese it just caused problems.

In Port Sudan, now the de facto capital, frustration boiled over as banks failed to provide enough new notes.

One 37-year-old woman spent days unsuccessfully trying to get the new money.

"I've been going to the bank four or five times a week to get the new currency. But there is none," she told AFP, requesting anonymity for fear of reprisals.

Grocers, rickshaw drivers, petrol stations and small shop owners are refusing to accept the old currency, preventing many transactions in a country reliant on cash.

"We cannot buy small things from street vendors any more or transport around the city because they refuse the old currency," the woman said.

The currency shift comes 21 months into a war that has devastated the northeast African country's economy and infrastructure, caused famine in some areas, uprooted millions of people and seen the Sudanese pound plunge.

From 500 pounds to the US dollar in April 2023, it now oscillates between 2,000 and 2,500.

Finance Minister Gibril Ibrahim defended the switch, saying it aims to "move money into the banking system, ensure the monetary mass enters formal channels as well as prevent counterfeiting and looted funds.”

But analysts say it is less about economics and more about gaining the upper hand in the war between army chief Abdel Fattah al-Burhan and his former deputy Mohamed Hamdan Daglo, who leads the Rapid Support Forces (RSF).

"The army is trying to weaken the RSF by having a more dominant currency," Matthew Sterling Benson at the London School of Economics and Political Science told AFP.

After the RSF looted banks, the army "wants to control the flow of money" and deprive them of resources, he said.

Kholood Khair, founder of think tank Confluence Advisory, believes that this financial squeeze may accelerate RSF plans to establish a rival currency and administration.

"The move has catalyzed the already existing trajectory towards a split," she told AFP.

Sudan is already fragmented: the army holds the north and east and the RSF dominates in the western Darfur region and parts of the south and center.

Greater Khartoum is carved up between them.

For Sudan's population, the move has only compounded their suffering.

Activist Nazik Kabalo, who has coordinated aid in several areas, said supply chains have been severely disrupted.

Farmers, traders and food suppliers rely entirely on cash.

"And if you do not have cash, you cannot buy supplies, needed for aid or for anything else," Kabalo told AFP.

The government has promoted digital banking apps such as Bankak, but many Sudanese cannot access them because of widespread telecommunications outages.