SEOUL, Sept 9 — A new uranium enrichment facility has been built at North Korea’s Yongbyon nuclear complex, according to the International Atomic Energy Agency, a development that could expand Pyongyang’s capacity to produce material for nuclear weapons and adds fresh uncertainty to regional security calculations across Asia. The IAEA said in a statement on Thursday, December 19, 2024, that the new facility sits adjacent to the existing centrifuge enrichment plant at Yongbyon, which has been operational since around 2010.
Director General Rafael Mariano Grossi said the discovery was made through satellite imagery and environmental sampling. The agency has not had access to North Korea since inspectors were expelled in 2009.
Yongbyon, located about 100 kilometers north of Pyongyang, is North Korea’s main nuclear site and has historically been used to produce both plutonium and enriched uranium. The IAEA’s report noted signs of ongoing activity elsewhere at the complex, including at the experimental light water reactor and the radiochemical laboratory, which is used for reprocessing plutonium. The new enrichment facility is significant because it could allow North Korea to produce more highly enriched uranium for weapons, bypassing constraints tied to its plutonium-based program.
The IAEA did not specify the facility’s capacity, but independent analysts estimate North Korea currently holds around 50 nuclear warheads. Additional enrichment capability could enable a larger stockpile.
Regional stakes
For Asian neighbors, the timing is uncomfortable. North Korea has conducted six nuclear tests since 2006, the most recent in September 2017, and the country remains under multiple UN Security Council resolutions imposing sanctions. The IAEA’s findings were presented to its Board of Governors, with Grossi calling on Pyongyang to comply with international obligations and allow inspectors to return.
Negotiations have been stalled since the failed Hanoi summit between then-US President Donald Trump and North Korean leader Kim Jong Un in February 2019. The IAEA’s statement was released ahead of a possible visit by US officials to the region, though no specific diplomatic initiatives were announced.
The United States and other countries have repeatedly urged North Korea to denuclearize.
Monitoring gaps
The IAEA’s verification of North Korean activity now relies entirely on satellite imagery and open-source information, given the absence of on-the-ground inspectors. That limitation underscores the challenge of confirming the scale of the new enrichment work. Grossi’s call for inspectors to return echoes longstanding UN demands, but with Pyongyang showing no sign of reversing its 2009 expulsion order, outside visibility into Yongbyon is likely to remain partial.
The expansion points to a familiar pattern: North Korea advancing its nuclear infrastructure while diplomatic channels stay quiet. What analysts will watch next is whether the new facility begins producing at scale, and whether any fresh diplomatic push follows the reported US visit to the region.
