Grossi said the IAEA was planning to continue technical discussions with Iran, but they had not yet taken place due to last weekend’s helicopter crash that killed President Ebrahim Raisi and Foreign Minister Hossein Amirabdollahian.

Director General of the International Atomic Energy Agency Rafael Grossi holds a press conference on the opening day of a quarterly meeting of the IAEA Board of Governors in Vienna, Austria, on March 4, 2024. The deaths of Iran’s president and foreign minister in a helicopter crash have caused a pause in the U.N. nuclear watchdog’s talks with Tehran over improving cooperation with the agency, the watchdog’s chief Rafael Grossi told Reuters on Wednesday. (REUTERS/Lisa Leutner/File Photo)

The IAEA faces a range of challenges in Iran, from Tehran’s recent barring of many of the most experienced uranium-enrichment experts on its inspection team to Iran’s continued failure to explain uranium traces found at undeclared sites despite a years-long IAEA investigation.

The IAEA has been trying to expand its oversight of Iran’s atomic activities while the country’s uranium-enrichment program continues to advance. Iran is enriching uranium to up to 60% purity, close to the 90% weapons-grade, which no other country has done without developing nuclear weapons.

Tehran says its aims are entirely peaceful.

Iran currently has about 140 kg of uranium enriched to up to 60%, Grossi said. According to an IAEA definition, that is theoretically enough, if enriched further, for three nuclear bombs. The IAEA’s last quarterly report in February said Iran had 121.5 kg, enough for two bombs.

Iran is still producing about nine kg a month of uranium enriched to up to 60%, Grossi said. It is also enriching to lower levels at which it has enough material for potentially more bombs.

Grossi, who two weeks ago said he wanted to start to see concrete results on improved cooperation from Iran soon, repeated that hope but said a more wide-ranging deal would require “a bit more time”.

For now, his team had not made progress on the main issues, he said.

“It is high time there is some concrete issuance and if not resolution, some clarification of what is this,” Grossi said of the uranium traces at undeclared sites.

“And I would say, confidence in many parts of the world (in Iran on the nuclear issue) is growing thinner.

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