FILE PHOTO: A satellite image shows a nuclear material production factory, in Yongbyon, North Korea, September 4, 2025. 2026 Planet Labs PBC/Handout via REUTERS/File Photo
IAEA Finds New North Korean Enrichment Facility as Nuclear Infrastructure Expands at Multiple Sites
By Jahanzaib Saqib — SCN NEWS
VIENNA/NEW YORK — North Korea has built a new uranium-enrichment facility at its main Yongbyon nuclear complex capable of housing as many as 28 centrifuge cascades, the U.N. nuclear watchdog has found, adding new evidence that Pyongyang is expanding its capacity to produce nuclear material while international inspectors remain locked out of the country.
The International Atomic Energy Agency said the newly identified two-storey building represents a second uranium-enrichment facility at Yongbyon. Its assessment was based on satellite imagery and open-source information, including photographs released by North Korean state media following a June visit to the site by leader Kim Jong Un. Images indicated that centrifuge cascades had been installed on both floors of the main building, with space for up to 28 cascades of the type visible in the photographs.
The finding is significant not simply because another enrichment building has appeared at Yongbyon. The IAEA also reported indications that operations began in January at an expanded annex of the Kangson uranium-enrichment facility near Pyongyang. Taken together, the observations suggest that North Korea is developing enrichment infrastructure at multiple locations rather than concentrating expansion at a single nuclear complex.
IAEA Director General Rafael Grossi said the continuing operation of enrichment facilities at both Kangson and Yongbyon, together with reported expansion of North Korea's production of weapons-grade nuclear material, was a cause for serious concern. The agency said the activities violate U.N. Security Council resolutions governing North Korea's nuclear programme.
Yet the discovery also illustrates one of the central weaknesses confronting international efforts to monitor Pyongyang's nuclear programme: the IAEA has had no inspectors inside North Korea since 2009. Unlike nuclear programmes where inspectors can physically examine facilities, take environmental samples, check inventories and monitor declared material, the agency must assess developments in North Korea remotely.
That limitation makes the way the new facility was identified particularly notable. According to the IAEA assessment, analysts compared North Korean state-media photographs of Kim's June visit with satellite images documenting construction of the building. Those separate sources allowed the agency to identify the structure as Yongbyon's second enrichment facility and assess the installation of centrifuge cascades on its two levels.
Uranium enrichment is particularly sensitive because centrifuges can produce fuel for civilian nuclear purposes but, when enrichment is taken sufficiently far, can also produce weapons-grade material. The IAEA's concern is therefore not based merely on construction activity but on indications of expanding capacity within a country that already possesses nuclear weapons and has repeatedly declared its nuclear status irreversible.
North Korea rejects the IAEA's authority over its nuclear activities. Pyongyang's mission to the United Nations in Vienna has argued that the agency has no legal right to interfere in the affairs of a nuclear-armed state outside the Nuclear Non-Proliferation Treaty. North Korea announced its withdrawal from the NPT in 2003 and has subsequently conducted nuclear tests while developing increasingly sophisticated missile systems.
The institutional standoff leaves an unusual verification problem. U.N. Security Council resolutions prohibit North Korea's nuclear-weapons programme, but the agency responsible for nuclear safeguards cannot enter the country to independently inspect the facilities now being expanded. Satellite surveillance and open-source intelligence can reveal construction and operational indicators, but they cannot provide the same degree of verification as inspectors physically present at nuclear sites.
The new findings also arrive at a sensitive moment for the wider nuclear order. The 81st session of the U.N. General Assembly opened in New York this week with Secretary-General António Guterres warning of a broader “risk of nuclear escalation.” North Korea's latest expansion is institutionally separate from the General Assembly opening, but it adds another active nuclear challenge to the diplomatic environment in which world leaders will gather later this month.
The North Korean case is particularly difficult for the Security Council. Pyongyang's programme has been subject to multiple Council sanctions and resolutions, but major-power divisions have increasingly complicated attempts to forge a common response. The latest IAEA findings therefore raise a question extending beyond the physical size of Yongbyon's new building: whether the international system possesses an effective mechanism for restraining nuclear expansion once monitoring access, diplomatic negotiations and Security Council unity have all deteriorated.
For UNGA81, that problem reinforces the gap between international nuclear rules and the ability to enforce them. North Korea is expanding infrastructure prohibited by Security Council resolutions while rejecting the authority of the nuclear watchdog and keeping its inspectors outside the country.
What the IAEA can now see from satellites and North Korea's own photographs suggests that the programme is not standing still. The harder question is what the international community can do about it.