N Korea has built two-storey uranium enrichment facility, says watchdog

North Korea has erected a new two‑storey uranium enrichment building at the Yongbyon nuclear complex, a development the International Atomic Energy Agency (IAEA) described as a cause for “serious concern.” The structure can accommodate up to 28 centrifuge cascades, expanding the regime’s capacity to enrich uranium. IAEA Director Rafael Grossi said the facility, identified through satellite imagery after North Korean leader Kim Jong Un visited a “newly inaugurated nuclear materials production factory” on 3 June, violates United Nations Security Council resolutions. The agency, expelled from the peninsula in 2009, relies on remote sensing to monitor the DPRK’s nuclear expansion, which now includes an enlarged annex at another enrichment site.

The discovery signals a steady broadening of Pyongyang’s sanctioned nuclear infrastructure, underscoring the difficulty of tracking a program that hides many of its facilities. In addition to Yongbyon, the IAEA reported operational signs at an enrichment site in Kangson near Pyongyang, where an annex was built in 2024 and activity appears to have begun in January. Experts note that the secrecy of these sites makes them hard to target; Edward Howell of Oxford University highlighted that beyond Yongbyon, locations like Kangson illustrate the embeddedness of nuclear doctrine in North Korea’s foreign and domestic policy. A 2022 non‑proliferation think‑tank estimate placed the regime’s nuclear spending at $640 million annually, a substantial outlay for one of the world’s poorest nations.

The expansion occurs amid heightened regional tension, with the North accelerating its missile program and having conducted six nuclear tests, the last in September 2017. South Korean President Lee Jae Myung has called for talks to formally end the Korean War, proposing that such a forum could address ways to curb North Korea’s nuclear advancements. While Pyongyang declared itself a nuclear power in 2022 and claims to produce 15‑20 new warheads each year, the IAEA’s findings reinforce international concerns that the DPRK is deepening its capacity to produce nuclear weapons despite global sanctions.

⚡ Effects Interpreter