North Korea Builds New Uranium Enrichment Facility, IAEA Warns

North Korea has constructed a second uranium enrichment facility at its main Yongbyon nuclear complex and has begun operating an expanded annex at the Kangson enrichment site near Pyongyang, the International Atomic Energy Agency (IAEA) disclosed in an August 28 report cited by Reuters.

The newly identified two-story building at Yongbyon can house up to 28 centrifuge cascades, according to IAEA analysis of satellite images and official North Korean state media photographs taken during a June visit by leader Kim Jong Un to the site. The photographs show centrifuge cascades installed on both floors of the main building.

Monitoring without inspectors on the ground

International inspectors have been barred from North Korea since 2009. To monitor Pyongyang's nuclear activities, the IAEA relies on analysis of commercial satellite imagery and open-source materials, including official North Korean state media photographs.

IAEA Director General Rafael Grossi warned in his September 7 address to the Board of Governors that the continued operation of the Kangson and Yongbyon facilities, along with reports of further expansion of weapons-grade fissile material production, is a cause for serious concern. The agency stated that such developments are in violation of UN Security Council resolutions.

Context: Russia-North Korea military cooperation

North Korea's accelerating military technology development is occurring against the backdrop of deepening ties with Russia. Since Russia's full-scale invasion of Ukraine in 2022, Moscow has provided Pyongyang with direct support for its missile and nuclear programs. South Korean and US intelligence reports indicate Russia has transferred technology for improving intercontinental ballistic missiles, military spy satellites, and nuclear technologies to Kim Jong Un's regime in exchange for millions of artillery shells, rockets, and troops deployed to fight in Ukraine.

In June 2024, the two countries signed a comprehensive strategic partnership agreement providing for mutual military assistance. Kim Jong Un has publicly declared a course of exponential growth in North Korea's nuclear arsenal, ordering the military-industrial complex to significantly increase production of nuclear warheads.