Satellite images indicate that North Korea has been expanding its suspected nuclear weapons program with new excavations revealing potential enrichment facilities, heat exchangers, and underground nuclear waste storage sites.
A recent report from 38 North, a US-based website monitoring North Korea’s activities and their global security implications, uncovered these findings. The report specifically highlights significant modernization and expansion efforts at the Yongbyon Nuclear Scientific Research Center between October and November 2025.
The expansion of the Yongbyon nuclear plant aligns with Kim Jong-Un’s goal to significantly grow the country’s nuclear arsenal. The facility plays a crucial role in producing nuclear material for weapons, being the sole producer of plutonium and a major source of enriched uranium.
New structures for storing radioactive waste and laboratories for uranium enrichment have been constructed at the Yongbyon plant. Satellite imagery indicates the recent installation of six heat exchangers near the main building, crucial for cooling centrifuges and maintaining controlled temperatures in nuclear facilities.
In the past, Kim Jong-Un proposed closing North Korea’s main nuclear weapons factory in exchange for the partial lifting of internal sanctions during a summit with former US President Trump in Hanoi, Vietnam, which was rejected in 2019.
Recent satellite images also show ongoing excavation near an old waste site, indicating the expansion of radioactive waste storage facilities in line with North Korea’s plans to increase nuclear material production. Additionally, refurbishment work on a hydrogen fluoride handling building suggests potential enhancements or dismantlement activities.
The report concludes that the construction of new enrichment, cooling, and waste facilities, as seen in satellite images, supports North Korea’s efforts to bolster its nuclear weapons arsenal. Activities throughout 2025, including reactor operation, testing of a light water reactor, reprocessing campaigns, and facility construction, align with Kim Jong-Un’s directive for exponential growth in nuclear capabilities.