VIENNA: Any deal between Iran and the US that would impose fresh nuclear curbs on Iran should include “very robust” inspections by the UN nuclear watchdog, International Atomic Energy Agency chief Rafael Grossi said on Wednesday.

The two countries are holding talks meant to rein in Iranian nuclear activities that have rapidly accelerated since President Donald Trump pulled Washington out of a 2015 deal between Iran and major powers that strictly limited those activities.

As that deal has unraveled, Iran has increased the purity to which it is enriching uranium to up to 60 percent, close to the roughly 90 percent of nuclear arms-grade, from 3.67 percent under the deal. It has also scrapped the extra IAEA oversight imposed by the 2015 pact.

“My impression is that if you have that type of agreement, a solid, very robust inspection by the IAEA ... should be a prerequisite, and I’m sure it will be, because it would imply a very, very serious commitment on the part of Iran, which must be verified,” Grossi said.

He stopped short, however, of saying Iran should resume implementation of the Additional Protocol, an agreement between the IAEA and member states that broadens the range of IAEA oversight to include snap inspections of undeclared sites. 

Iran implemented it under the 2015 deal, until the US exit in 2018.

Asked if he meant the protocol should be applied, Grossi said “I’m very practical,” adding that this was not a subject in the talks. While the IAEA is not part of the talks, he said he was in touch with both sides, including US special envoy Steve Witkoff.

“I don’t think they are discussing it in these terms. I don’t see the discussion as being a discussion on legal norms to be applied or not. I tend to see this as more of an ad hoc approach,” said Grossi.

Iran, meanwhile, said it may consider allowing US inspectors with the IAEA to inspect its facilities if a deal is reached with the US.

“Countries that were hostile to us and behaved unprincipledly over the years — we have always tried not to accept inspectors from those countries,” Iran’s nuclear chief Mohammad Eslami said, referring to staff from the IAEA. Tehran “will reconsider accepting American inspectors through the agency” if “an agreement is reached, and Iran’s demands are taken into account,” he added.

Foreign Ministry spokesman Esmaeil Baqaei said that “consultations are ongoing regarding the time and location of the next round of talks, and once finalized, they will be announced by Oman.” 

Eslami said: “The enrichment percentage depends on the type of use. When highly enriched uranium is produced, it does not necessarily mean military use,” he said.

Baqaei meanwhile said: “The continuation of enrichment in Iran is an inseparable part of the country’s nuclear industry and a fundamental principle for the Islamic Republic of Iran.”

“Any proposal or initiative that contradicts this principle or undermines this right is unacceptable.”