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.”



Why is Israel Launching Crackdown in the West Bank after the Gaza Ceasefire?

Israeli army vehicles are seen during a military operation in the West Bank city of Jenin, Tuesday, Jan. 21, 2025. (AP Photo/Majdi Mohammed).
Israeli army vehicles are seen during a military operation in the West Bank city of Jenin, Tuesday, Jan. 21, 2025. (AP Photo/Majdi Mohammed).
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Why is Israel Launching Crackdown in the West Bank after the Gaza Ceasefire?

Israeli army vehicles are seen during a military operation in the West Bank city of Jenin, Tuesday, Jan. 21, 2025. (AP Photo/Majdi Mohammed).
Israeli army vehicles are seen during a military operation in the West Bank city of Jenin, Tuesday, Jan. 21, 2025. (AP Photo/Majdi Mohammed).

In the days since a fragile ceasefire took hold in the Gaza Strip, Israel has launched a major military operation in the occupied West Bank and suspected Jewish settlers have rampaged through two Palestinian towns.

The violence comes as Israeli Prime Minister Benjamin Netanyahu faces domestic pressure from his far-right allies after agreeing to the truce and hostage-prisoner exchange with the Hamas militant group. US President Donald Trump has, meanwhile, rescinded the Biden administration's sanctions against Israelis accused of violence in the territory.

It's a volatile mix that could undermine the ceasefire, which is set to last for at least six weeks and bring about the release of dozens of hostages in exchange for hundreds of Palestinian prisoners, most of whom will be released into the West Bank.

Israel captured the West Bank, Gaza and east Jerusalem in the 1967 Mideast war, and Palestinians want all three territories for their future state. Escalations in one area frequently spill over, raising further concerns that the second and far more difficult phase of the Gaza ceasefire - which has yet to be negotiated - may never come.

Dozens of masked men rampaged through two Palestinian villages in the northern West Bank late Monday, hurling stones and setting cars and property ablaze, according to local Palestinian officials. The Red Crescent emergency service said 12 people were beaten and wounded.

Israeli forces, meanwhile, carried out a raid elsewhere in the West Bank that the military said was in response to the hurling of firebombs at Israeli vehicles. It said several suspects were detained for questioning, and a video circulating online appeared to show dozens being marched through the streets.
On Tuesday, the Israeli military launched another major operation, this time in the northern West Bank city of Jenin, where its forces have regularly clashed with Palestinian militants in recent years, even before Hamas' Oct. 7, 2023, attack out of the Gaza Strip triggered the war there.

At least nine Palestinians were killed on Tuesday, including a 16-year-old, and 40 were wounded, the Palestinian Health Ministry said. The military said its forces carried out airstrikes and dismantled roadside bombs and "hit" 10 militants - though it was not clear what that meant.

Palestinian residents have reported a major increase in Israeli checkpoints and delays across the territory.

Israeli Defense Minister Israel Katz cast the Jenin operation as part of Israel's larger struggle against Iran and its militant allies across the region, saying "we will strike the octopus' arms until they snap."

The Palestinians view such operations and the expansion of settlements as ways of cementing Israeli control over the territory, where 3 million Palestinians live under seemingly open-ended Israeli military rule, with the Western-backed Palestinian Authority administering cities and towns.

Prominent human rights groups call it a form of apartheid since the over 500,000 Jewish settlers in the territory have all the rights conferred by Israeli citizenship. Israel rejects those allegations.

Netanyahu has been struggling to quell a rebellion by his ultranationalist coalition partners since agreeing to the ceasefire. The agreement requires Israeli forces to withdraw from most of Gaza and release hundreds of Palestinian prisoners - including militants convicted of murder - in exchange for hostages abducted in the Oct. 7 attack.

One coalition partner, Itamar Ben-Gvir, resigned in protest the day the ceasefire went into effect. Another, Finance Minister Bezalel Smotrich, has threatened to bolt if Israel does not resume the war after the first phase of the ceasefire is slated to end in early March.

They want Israel to annex the West Bank and to rebuild settlements in Gaza while encouraging what they refer to as the voluntary migration of large numbers of Palestinians.

Netanyahu still has a parliamentary majority after Ben-Gvir's departure, but the loss of Smotrich - who is also the de facto governor of the West Bank - would severely weaken his coalition and likely lead to early elections.

That could spell the end of Netanyahu's nearly unbroken 16 years in power, leaving him even more exposed to longstanding corruption charges and an expected public inquiry into Israel's failure to prevent the Oct. 7 attack.

Trump's return to the White House offers Netanyahu a potential lifeline.

The newly sworn-in president, who lent unprecedented support to Israel during his previous term, has surrounded himself with aides who support Israeli settlement. Some support the settlers' claim to a biblical right to the West Bank because of the Jewish kingdoms that existed there in antiquity.

The international community overwhelmingly considers settlements illegal.

Among the flurry of executive orders Trump signed on his first day back in office was one rescinding the Biden administration's sanctions on settlers and Jewish extremists accused of violence against Palestinians.

The sanctions - which had little effect - were one of the few concrete steps the Biden administration took in opposition to the close US ally, even as it provided billions of dollars in military support for Israel's campaign in Gaza, among the deadliest and most destructive in decades.

Trump claimed credit for helping to get the Gaza ceasefire agreement across the finish line in the final days of the Biden presidency.

But this week, Trump said he was "not confident" it would hold and signaled he would give Israel a free hand in Gaza, saying: "It's not our war, it's their war."