The International Atomic Energy Agency's latest quarterly report said that Tehran has accelerated the installation of advanced uranium enrichment equipment at its central Natanz plant.
It also outlined further advances at a reactor under construction at Arak which Western countries fear could provide Iran with plutonium if the fuel is reprocessed.
Highly enriched uranium and plutonium can both be used in the explosive core of a nuclear weapon. Iran has denied this is its aim.
Iran has said it intends to install around 3,000 of the new centrifuges at Natanz -- where around 13,500 of the older models are installed -- enabling it to speed up the enrichment of uranium.
The UN Security Council has passed numerous resolutions calling on Iran to suspend all enrichment and heavy water activities -- the kind being built at Arak --, and has imposed four rounds of sanctions.
Last year additional unilateral US and EU sanctions targeting Iran's oil exports and its financial system began to cause real problems for the Persian Gulf country's economy.
Despite the developments at Natanz, the IAEA report seen noted that Iran has not started operating any new equipment at its Fordo plant.
Fordo is of more concern to the international community, since it is used to enrich uranium to fissile purities of 20 per cent and Natanz mostly to five per cent.
The ability to enrich to 20 per cent is technically speaking considerably closer to 90 per cent, the level needed for a nuclear weapon.
It also "observed that a number of other major components had yet to be installed, including the control room equipment, the refuelling machine and reactor cooling pumps," the IAEA said.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
