28 July 2015

Satellite Imagery Shows Latest Developments at North Korea’s Yongbyon Nuclear Reactor Facility

William Mugford
July 26, 2015

North Korea’s Yongbyon Nuclear Facility: Sporadic Operations at the 5 MWe Reactor But Construction Elsewhere Moves Forward

Recent commercial satellite imagery indicates that North Korea’s 5 MWe Plutonium Production Reactor may not be operating or is only functioning at low power levels. The presence of what is likely a vehicle to transport carbon dioxide used in the reactor’s cooling system may indicate that maintenance activities are underway. The reactor appears to have been operating only sporadically since fall 2014 perhaps because the facility is aging.

Construction that began in late spring 2015 continues at the incomplete Experimental Light Water Reactor (ELWR). Imagery from July 2 shows that the construction adjacent to the reactor hall can now be identified as a transformer yard to connect the electricity producing reactor to the grid. The yard appears to be complete but all the equipment is probably not yet installed. Once finished, the North Koreans will have taken another step towards beginning initial operation of the reactor.

Work also continued at a rapid pace at the Uranium Enrichment complex at Yongbyon. The roof of the building that contains the probable hot cells is nearly externally complete, as is the large unidentified L-shaped building.

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