Kazem Gharibabadi told reporters on Friday that since the very first day when the Joint Comprehensive Plan of Action (JCPOA) took effect, the IAEA has kept up monitoring Iran's obligations under the accord.
"The IAEA's new report on the JCPOA indicates the continuation of the agency's verification activities and also depicts Iran's measures towards implementing decisions to suspend its JCPOA commitments," he said.
The report affirms that the UN nuclear agency has continued to verify Iran's non-deviation of nuclear materials as well as its temporary and voluntary implementation of the Nuclear Nonproliferation Treaty (NPT), he added.
Though Iran has been hard hit by the new coronavirus pandemic, the IAEA said it has maintained its verification and monitoring activities in the country, primarily by chartering aircraft to fly inspectors to and from Iran.
It also cited “exceptional cooperation” from authorities in Austria, where it is based, and Iran in facilitating the operation.
Iran signed the JCPOA with six world powers —the US, Germany, France, Britain, Russia and China — in 2015.
The nuclear deal promised Iran economic incentives in return for the curbs on its peaceful nuclear program. US President Donald Trump pulled America out of the deal unilaterally in 2018 and reimposed sanctions on Iran.
Washington’s withdrawal left the future of the historic agreement in limbo.
Iran remained fully compliant with the JCPOA for an entire year, waiting for the co-signatories to fulfill their end of the bargain by offsetting the impacts of American bans on the Iranian economy.
But as the European parties failed to do so, the Islamic Republic moved in May 2019 to incrementally suspend its JCPOA commitments under Articles 26 and 36 of the deal covering Tehran’s legal rights.
Iran took five steps in scaling back its obligations, among them abandoning operational limitations on its nuclear industry, including with regard to the capacity and level of uranium enrichment.
All those measures were adopted after informing the IAEA beforehand, with the agency's inspectors present on the ground in Iran.
Gharibabadi said the IAEA report confirms that Tehran has been continuing to enrich uranium to a purity of up to 4.5 percent, higher than the 3.67 percent set by the JCPOA.
The report, he noted, further shows that Iran has been using new enrichment equipment in its research and development lines.
In its report, the IAEA said Iran's enriched uranium stockpile stood at 1,571.6 kg on May 20.
The limit set in the 2015 deal was 300 kilograms (661 pounds) of enriched uranium in a particular compound form, which is the equivalent of 202.8 kg of uranium.
On Friday, Russia’s permanent representative to international organizations in Vienna, Mikhail UIyanov, said that the Western media's publication of a confidential report on Iran reveals that the IAEA regime of confidentiality is no longer working.
According to the Russian envoy, the report was intended for states members of the IAEA Board of Governors. However, minutes after being handed over to them, the report leaked to Western news agencies, which published excerpts from it.
"This means that the regime of confidentiality in the agency’s work is absolutely not working," Ulyanov said.
Press TV, AFP and AP contributed to this story.