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.”



Israel’s Cutoff of Supplies to Gaza Sends Prices Soaring as Aid Stockpiles Dwindle

Members of Abed family, warm up by a fire at a tent camp for displaced Palestinians at the Muwasi, Rafah, southern Gaza Strip, Monday, Feb. 24, 2025. (AP Photo/Jehad Alshrafi)
Members of Abed family, warm up by a fire at a tent camp for displaced Palestinians at the Muwasi, Rafah, southern Gaza Strip, Monday, Feb. 24, 2025. (AP Photo/Jehad Alshrafi)
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Israel’s Cutoff of Supplies to Gaza Sends Prices Soaring as Aid Stockpiles Dwindle

Members of Abed family, warm up by a fire at a tent camp for displaced Palestinians at the Muwasi, Rafah, southern Gaza Strip, Monday, Feb. 24, 2025. (AP Photo/Jehad Alshrafi)
Members of Abed family, warm up by a fire at a tent camp for displaced Palestinians at the Muwasi, Rafah, southern Gaza Strip, Monday, Feb. 24, 2025. (AP Photo/Jehad Alshrafi)

Israel’s cutoff of food, fuel, medicine and other supplies to Gaza’s 2 million people has sent prices soaring and humanitarian groups into overdrive trying to distribute dwindling stocks to the most vulnerable.

The aid freeze has imperiled the progress aid workers say they have made to stave off famine over the past six weeks during Phase 1 of the ceasefire deal Israel and Hamas agreed to in January.

After more than 16 months of war, Gaza’s population is entirely dependent on trucked-in food and other aid. Most are displaced from their homes, and many need shelter. Fuel is needed to keep hospitals, water pumps, bakeries and telecommunications — as well as trucks delivering the aid — operating.

Israel says the siege aims at pressuring Hamas to accept its ceasefire proposal. Israel has delayed moving to the second phase of the deal it reached with Hamas, during which the flow of aid was supposed to continue. Israeli Prime Minister Benjamin Netanyahu said Tuesday that he is prepared to increase the pressure and would not rule out cutting off all electricity to Gaza if Hamas doesn’t budge.

Rights groups have called the cutoff a “starvation policy.”

Four days in, how is the cutoff affecting Gaza?

Food, fuel and shelter supplies are threatened The World Food Program, the UN's main food agency, says it has no major stockpile of food in Gaza because it focused on distributing all incoming food to hungry people during Phase 1 of the deal. In a statement to AP, it said existing stocks are enough to keep bakeries and kitchens running for under two weeks.

WFP said it may be forced to reduce ration sizes to serve as many people as possible. It said its fuel reserves, necessary to run bakeries and transport food, will last for a few weeks if not replenished soon.

There’s also no major stockpile of tents in Gaza, said Shaina Low, communications adviser for the Norwegian Refugee Council. The shelter materials that came in during the ceasefire’s first phase were “nowhere near enough to address all of the needs,” she said.

“If it was enough, we wouldn’t have had infants dying from exposure because of lack of shelter materials and warm clothes and proper medical equipment to treat them,” she said.

At least seven infants in Gaza died from hypothermia during Phase 1.

Urgently checking reserves “We’re trying to figure out, what do we have? What would be the best use of our supply?" said Jonathan Crickx, chief of communication for UNICEF. "We never sat on supplies, so it’s not like there’s a huge amount left to distribute.”

He predicted a “catastrophic result” if the aid freeze continues.

During the ceasefire's first phase, humanitarian agencies rushed in supplies, with about 600 trucks entering per day on average. Aid workers set up more food kitchens, health centers and water distribution points. With more fuel coming in, they could double the amount of water drawn from wells, according to the UN humanitarian agency.

Around 100,000 tents also arrived as hundreds of thousands of Palestinians tried to return to their homes, only to find them destroyed or too damaged to live in.

But the progress relied on the flow of aid continuing.

Oxfam has 26 trucks with thousands of food packages and hygiene kits and 12 trucks of water tanks waiting outside Gaza, said Bushra Khalidi, Oxfam’s policy lead in the West Bank.

“This is not just about hundreds of trucks of food, it’s about the total collapse of systems that sustain life,” she said.

The International Organization for Migration has 22,500 tents in its warehouses in Jordan after trucks brought back their undelivered cargo once entry was barred, said Karl Baker, the agency's regional crisis coordinator.

The International Rescue Committee has 6.7 tons of medicines and medical supplies waiting to enter Gaza and its delivery is “highly uncertain,” said Bob Kitchen, vice president of its emergencies and humanitarian action department.

Medical Aid for Palestinians said it has trucks stuck at Gaza's border carrying medicine, mattresses and assistive devices for people with disabilities. The organization has some medicine and materials in reserve, said spokesperson Tess Pope, but "we don’t have stock that we can use during a long closure of Gaza.”

Prices up sharply Prices of vegetables and flour are now climbing in Gaza after easing during the ceasefire.

Sayed Mohamed al-Dairi walked through a bustling market in Gaza City just after the aid cutoff was announced. Already, sellers were increasing the prices of dwindling wares.

“The traders are massacring us, the traders are not merciful to us,” he said. “In the morning, the price of sugar was 5 shekels. Ask him now, the price has become 10 shekels.”

In the central Gaza city of Deir Al-Balah, one cigarette priced at 5 shekels ($1.37) before the cutoff now stands at 20 shekels ($5.49). One kilo of chicken (2.2 pounds) that was 21 shekels ($5.76) is now 50 shekels ($13.72). Cooking gas has soared from 90 shekels ($24.70) for 12 kilos (26.4 pounds) to 1,480 shekels ($406.24).

Following the Oct. 7, 2023, Hamas attack on Israel, Israel cut off all aid to Gaza for two weeks — a measure central to South Africa’s case accusing Israel of genocide in Gaza at the International Court of Justice. That took place as Israel launched the most intense phase of its aerial bombardment of Gaza, one of the most aggressive campaigns in modern history.

Palestinians fear a repeat of that period.

“We are afraid that Netanyahu or Trump will launch a war more severe than the previous war,” said Abeer Obeid, a Palestinian woman from northern Gaza. "For the extension of the truce, they must find any other solution.”