VIENNA, June 28: Senior officials from Iran and the remaining signatories to its 2015 nuclear deal with world powers are gathering in Vienna Friday as tensions in the Persian Gulf simmer and Tehran is poised to surpass a uranium stockpile threshold, posing a threat to the accord.

The regular quarterly meeting of the accord’s so-called joint commission, which brings together senior officials from Iran, France, Germany, Britain, Russia, China and the European Union, is meant to discuss implementation of the deal.

Iran is insisting that it wants to save the agreement and has urged Europeans to start buying Iranian oil or give Iran a credit line.

The 2015 agreement aimed at curbing Iran’s nuclear ambitions in exchange for relief from economic sanctions. The United States withdrew from the accord last year and has imposed new sanctions on Iran to cripple its economy.

Iran recently quadrupled its production of low-enriched uranium. It previously said it would surpass a 300-kilogram stockpile limit set by the accord by Thursday, but an Iranian official said that it was 2.8 kilograms below that limit Wednesday and there would be no new assessment until “after the weekend.” It is currently a holiday weekend in Iran.

European countries are pressing for Iran to comply in full with the accord. But Iranian officials maintain that even if it surpasses the limit, it would not be breaching the deal, and say such a move could be reversed quickly.

On Thursday, Iranian state television reported that Foreign Minister Mohammad Javad Zarif sent a letter urging European signatories to the accord to implement their commitments, saying Iran’s next steps depend on that.

Britain, France and Germany are finalizing a complicated barter-type system known as INSTEX to maintain trade with Iran and avoid U.S. sanctions, as part of efforts to keep the nuclear deal afloat.

 
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