IAEA closes the Assad-era Syria file and counts 73 tonnes of uranium metal

The International Atomic Energy Agency told member states on Tuesday that it has resolved its outstanding safeguards questions on secret nuclear work carried out in Syria under Bashar al-Assad. A confidential report seen by Reuters and AFP says inspectors who visited Syrian sites in August confirmed that the compound Israel bombed in 2007 in Deir ez-Zor province was a nuclear reactor under construction. Cooling infrastructure uncovered by excavation is consistent with a reactor, the agency wrote after a 29 August visit to watch the digging.

The same report records about 73 metric tonnes of natural uranium metal at a connected site. Fifty-five tonnes are in fuel-rod form. The rest is scrap and waste. Fuel for the reactor was made inside Syria. All of that material is now under IAEA containment and surveillance. Damascus has said the material will stay in the country. Director General Rafael Mariano Grossi welcomed what he called Syria's transparency and cooperation. The new authorities, in power since Assad's fall in late 2024, have filed the nuclear-material accounts and design information that the old government never submitted.

What Assad did not declare

The agency listed three undeclared items that the former authorities were required to report: the reactor itself, a fuel-fabrication plant, and a store for fuel, scrap and waste. Three other locations were functionally tied to Deir ez-Zor, including a site linked to conversion or fuel-making and a site the agency associates with planned reprocessing. Inspectors visited two further locations on 19 August and found no nuclear material or equipment. Environmental-sample results from those visits are still pending.

The reactor design matches the agency's earlier assessment: gas-cooled and graphite-moderated. That is the same family as the Yongbyon reactor in North Korea. Israel destroyed the building in 2007. For years Syria denied it was a reactor. The new government has chosen to open the ground and hand over paper.

The Iran contrast

The Tuesday packet of reports also covered Iran. There, the agency said it had made no progress. Access remains blocked. The contrast is the political point. Syria's new rulers want recognition and reconstruction money. Giving Grossi's inspectors the run of Deir ez-Zor is a cheap way to show a break with Assad. Iran, in a shooting war with the United States over Hormuz, has no such incentive.

Grossi met Syrian Foreign Minister Asaad al-Shibani in Damascus on 18 August. The photo line that day is now the source of the report. The agency will keep watching the excavation as more of the cooling system comes out of the dirt. That work will produce photographs and measurements. It will not put the 2007 strike back on the diplomatic agenda. It will put 73 tonnes of uranium metal on a ledger that inspectors can check.

What 73 tonnes means

Natural uranium metal in fuel-rod form is not a bomb. It is reactor fuel for a design that, if finished and run, could have produced plutonium. The 2007 strike stopped that path. The metal that survived in storage is now the most concrete number the IAEA has published on the Syrian programme. Keeping it in Syria under seals is a political choice by Damascus. Moving it out would require a buyer, a shipper and a Security Council conversation that no one has opened.

The open technical items are the pending swipe samples and the rest of the excavation. The open political item is whether the new Syrian authorities will accept additional protocol-level access as a habit, or only as a one-time display. Tuesday's report says the old questions are closed. It does not say the file can never be reopened.