Iran says it enriches uranium to 60% purity at Fordo plant
Iran has begun producing uranium enriched to 60 percent at its Fordo plant, official media reported on Tuesday about the underground facility that reopened three years ago amid the breakdown of its nuclear deal with major powers.
The move was part of Iran's response to the UN nuclear watchdog's adoption last week of a censure motion drafted by Western governments accusing it of noncooperation.
"Iran has started producing uranium enriched to 60 per cent at the Fordo plant for the first time," Iran's ISNA news agency reported.
An atomic bomb requires uranium enriched to 90 per cent, so 60 per cent is a significant step towards weapons-grade enrichment.
Iran has always denied any ambition to develop an atomic bomb, insisting its nuclear activities are for civilian purposes only.
Under a landmark deal struck in 2015, Iran agreed to mothball the Fordo plant and limit its enrichment of uranium to 3.67 percent, sufficient for most civilian uses, as part of a package of restrictions on its nuclear activities aimed at preventing it covertly developing a nuclear weapon.
In return, major powers agreed to relax sanctions they had imposed over Iran's nuclear programme.
But the deal began falling apart in 2018 when then US president Donald Trump pulled Washington out of the agreement and reimposed crippling economic sanctions.
The following year, Iran began stepping away from its commitments under the deal. It reopened the Fordo plant and starting enriching uranium to higher levels.
In January 2021, Iran said it was working to enrich uranium to 20 percent at Fordo. Several months later another Iranian enrichment plant reached 60 per cent.
President Joe Biden has expressed a desire for Washington to return to a revived deal and on-off talks have been underway since April last year.
Secretary of State Antony Blinken said late last month that he saw little scope to restore the deal, as Iran battles nationwide protests sparked by the September death in morality police custody of Mahsa Amini, a 22-year-old Kurdish woman.
The heavily protected Fordo plant around 180 kilometres south of Tehran was built deep underground in a bid to shield it from air or missiles strikes by Iran's enemies.
Arch foe Israel has never ruled out military action if it deems it necessary to prevent Iran developing a nuclear weapons capability.
Israel is widely suspected to hold the region's sole if undeclared nuclear arsenal, although it has consistently refused to confirm or deny that it is nuclear-armed.
The implementation of the 2015 deal was overseen by the International Atomic Energy Agency but the UN watchdog's relations with Iran have declined sharply in recent months.