“The rest of seals will be removed today and the activities will resume,” said Gholamreza Aghazadeh, head of Iran’s nuclear energy agency, speaking on state television.
Breaking the seals is the next crucial stage at the plant, after Monday’s announcement that Iran would resume suspended uranium conversion operations, causing an international outcry.
The UN watchdog, the International Atomic Energy Agency is to hold a second day of emergency talks over Iran’s decision in Vienna, after failing to agree on an appropriate response on Tuesday.
The IAEA has been investigating Iran for more than two years over claims it is secretly developing nuclear weapons, however no firm proof has been uncovered.
The United States has accused Tehran of using a civilian nuclear program as a cover for its weapons ambitions, however Iran has steadfastly denied this.
Conversion turns uranium ore or yellowcake into a feed gas for enriching uranium, which can be the fuel for reactors or the explosive core of atom bombs.
Iran’s new President Mahmoud Ahmadinejad said he is ready for further talks on the country’s nuclear program, and will put forward new proposals.
He described as an insult an EU offer to Iran of trade and other incentives in exchange for guarantees it is not manufacturing weapons.
But his American counterpart George W Bush expressed scepticism that Tehran is ready to resume talks with European powers.
Speaking from his Texas ranch, he warned Iran that the threat of UN sanctions over its nuclear activities remains, and underlined his deep suspicion of the Middle Eastern country’s plans to resume talks with the trio heading negotiations on behalf of the EU: France, Germany and the UK.
“They have, in the past, said they would adhere to international norms and then were caught enriching uranium. And that’s dangerous,” said Mr Bush.