IAEA opens its 70th conference as Guterres warns nuclear guardrails are falling

The International Atomic Energy Agency opened its 70th General Conference at the Vienna International Centre on Monday with a blunt message from the United Nations secretary-general. Antonio Guterres, speaking through Monica Juma, director-general of the United Nations Office at Vienna, said the meeting is taking place in a period of deep turbulence. Attacks on nuclear facilities are rising. The forces that push states toward nuclear weapons are accelerating. The rules that used to restrain them are weakening.

The conference runs through 18 September. IAEA figures put attendance at about 2,500 to 3,000 people in a normal year. Xinhua, citing the opening session, put this year's turnout near 4,000 senior officials, member-state delegates, and representatives of international organisations and non-governmental groups. The Agency now has 182 members after Timor-Leste joined. Director General Rafael Mariano Grossi used his opening statement to mark that accession and to contrast two inspection files that moved in opposite directions in 2026.

Guterres's written message, posted by the UN on 14 September, called the IAEA the custodian of the safeguards system that checks nuclear material is not diverted to weapons. He also pointed to the Agency's work on electricity, cancer care and agriculture. Then he listed the pressure points. Member states, he said, must give the IAEA full cooperation on Iran so inspectors can confirm that the programme remains peaceful. They must keep supporting the Agency's effort to prevent a disaster at the Zaporizhzhia Nuclear Power Plant in Ukraine. And they must put predictable money into the Technical Cooperation Fund that pays for work in developing countries.

"The world is on the cusp of a revolution in nuclear power generation, a revolution that requires careful management and monitoring," Guterres said. "More than ever, the world needs the IAEA's professionalism, impartiality and technical excellence."

Grossi's prepared statement struck a different tone on Syria and Iran. He said recent progress on safeguards in Syria came from that government's transparency and from the Agency's own technical work. On Iran he said oversight deteriorated in 2026. He referred to renewed attacks on the country at the end of February. The conference agenda, published as GC(70)/1 and later addenda, includes separate items on safeguards in the Middle East, safeguards in the Democratic People's Republic of Korea, nuclear safety and security in Ukraine, and a US request to discuss the transfer of nuclear material under AUKUS.

Israel asked for an item on Israeli nuclear capabilities. Iran sent a 14 September note on the examination of delegates' credentials. Those papers sit on the table with the 2025 annual report, the 2025 financial statements, the 2027 budget update, and the Nuclear Security Report 2026. The Agency will also elect members of the Board of Governors and set the scale of assessment for next year's regular budget.

The plenary meets in the M Building. The Committee of the Whole sits in Board Room C. National statements in the general debate are capped at seven minutes under a 2016 streamlining decision. The speaker order was drawn by ballot on 25 June among states that inscribed between 11 and 16 June. By Tuesday morning, statements from India, Japan, China, France, Egypt and the European Union were already posted on the conference site.

A two-day Scientific Forum opens on Tuesday inside the same complex. Its subject is Rays of Hope, the IAEA programme that tries to expand radiotherapy and nuclear medicine in countries that still lack basic cancer equipment. The forum will run through Wednesday and will be livestreamed. That session is the part of the week most likely to produce announcements on money and partnerships rather than on verification fights.

The conference is the Agency's main policy meeting. It has been held every year since the first gathering of 56 states at the Vienna Konzerthaus in October 1957. Vienna became the host city then. The Vienna International Centre, the actual headquarters, came later. The anniversary framing is useful only as a measure of how much the workload has changed. The Agency now tracks operating reactors, wartime plants, new small modular designs, and inspection access that can vanish after a strike.

What the week will decide is narrower than the speeches. Delegates will vote on the budget path into 2027, on the technical cooperation target, and on language covering Ukraine, Iran, the Middle East and AUKUS. Those votes set the legal and financial frame for inspectors who will still be in the field after the flags come down on Friday. The open question left on the table by Guterres is whether member states will fund that work at the level the Agency says it now needs, or whether the gap between the warning and the cheque will stay where it is.