15 related posts found

Enhancing Understanding of Yongbyon Through Thermal Imagery: Part 1

Nuclear Weapons
June 17, 2024, by , and — TIR (TIR) analysis via LANDSAT 8 and 9 imagery over two years provides key insights into Yongbyon nuclear facilities' operations, highlighting the intricate strengths and limitations of thermal imagery for operational assessment... Overview of the normalized land surface temperature calculated from daytime LANDSAT 8 thermal infrared (TIR)…

Thermal Imagery Analysis of Continued Activity at Yongbyon

Nuclear Weapons
February 18, 2022, by , , and — LANDSAT 7 and LANDSAT 8 thermal infrared satellite imagery in January and February show that warm water is being discharged from the 5MWe reactor at Yongbyon, confirming that the reactor and its cooling system are in operation. Thermal patterns from the same period suggests that the IRT-DPRK reactor, the Radiochemistry Laboratory, and the centrifuge plant are occupied, but not necessarily operational, and not in a state of shutdown. 

Thermal Imagery Analysis of Yongbyon

Nuclear Weapons
December 8, 2021, by , , and — Recent thermal infrared imagery of the Yongbyon Nuclear Research Center show warm water being discharged from the cooling system of the 5MWe reactor and that the reactor is in operation. During the past several months, water discharge from the reactor and probable steam exhaust from the steam turbine and electric generator hall has been observed in visible satellite imagery. Through thermal imagery, it can be determined that the water that is being discharged is indeed warm water discharge from the reactor's cooling system.

Thermal Imagery Indicates Activity at Yongbyon Nuclear Reprocessing Facilities

Nuclear Weapons
April 15, 2021, by , , and — Recently acquired LANDSAT 7 and 8 thermal infrared imagery of the Yongbyon Nuclear Research Center provide strong indications that during March and April 2021, activity involving the heating of buildings and operations of facility support systems had resumed at several locations. These indications reveal clear patterns, distinct from the surrounding terrain and daily solar heating patterns, that suggest that the Radiochemistry Laboratory, its associated thermal plant, and the centrifuge plant resumed operations during the early part of March 2021 and have continued into mid-April 2021.

Reprocessing Activity at Yongbyon’s Radiochemistry Laboratory?

Nuclear Weapons
March 30, 2021, by and — At the Yongyon Radiochemistry Laboratory, steam (or smoke) rising from any of the stacks within the radiochemistry laboratory itself is not often observed in commercial satellite imagery. However, the March 30 image shows a plume of steam or smoke emanating from a small support building in the center of the facility. This, while not an indicator of a reprocessing campaign itself, indicates that the building is occupied and being heated.

Yongbyon Declassified Part VII: Final Stretch of First-Phase Construction Begins

Nuclear Weapons
CIA, declassified KH-4B image, April 20, 1972.
March 11, 2020, by — Declassified April 1972 satellite imagery the Yongbyon Nuclear Research Center show developments which taken as a whole continue to represent both an ongoing first-phase construction project for the facility and early infrastructure development efforts within a longer-term plan for future expansion. This work laid the foundations for the construction of the facility’s first waste storage facility in the years to follow and the massive second phase expansion that would begin during the early-1980s.