North Korea Built New Uranium Facility at Yongbyon: IAEA — SkimNews
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- IAEA voiced "serious concern" over evidence that North Korea built a new uranium enrichment facility at Yongbyon, confirmed through satellite imagery and state media photographs from Kim Jong-un's June visit to the site.
- The new Yongbyon building can house up to 28 centrifuge cascades, and North Korea has also expanded operations at its Kangson enrichment site near Pyongyang, according to the IAEA report released this week.
- A 2025 analysis by the James Martin Center for Nonproliferation Studies estimated the 28 cascades comprising 4,592 centrifuges could yield roughly 85 kg of weapons-grade highly enriched uranium annually — enough for three to four additional warheads.
- Kim Jong-un claimed during his June Yongbyon visit that North Korea's weapons-grade material production capacity had more than doubled over the past five years, pledging "vast future plans to exponentially strengthen the country's nuclear forces."
- South Korea's defense minister Ahn Gyu-back told lawmakers in August that North Korea possesses 80 to 120 nuclear warheads — far higher than the 57 figure cited by Donald Trump the same month.
- IAEA Director General Rafael Grossi called North Korea's nuclear program continuation "clear violations of relevant UN security council resolutions and deeply regrettable"; the agency's inspectors were expelled from the country in 2009.
Why it matters: At full capacity, the new Yongbyon facility produces enough weapons-grade uranium for three to four additional warheads annually — layered on top of South Korea's estimate of 80-120 existing warheads, nearly double the 57 figure Trump cited in August. With IAEA inspectors barred from the country since 2009, the international community is relying on satellite imagery alone to monitor an accelerating nuclear program.
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