Jump to search Jump to main navigation Jump to main content Jump to footer navigation

Global Security Newswire

Daily News on Nuclear, Biological & Chemical Weapons, Terrorism and Related Issues

Produced by
NationalJournal logo

New Images Suggest North Korea Temporarily Shut Down Reactor

An analysis of recent satellite images indicates North Korea earlier this year temporarily halted operations at its plutonium reactor, likely due to safety fears.

The North is assessed to have restarted its Soviet-era graphite reactor at the Yongbyon complex in 2013 in accordance with its vow to rededicate nuclear facilities toward the production of fissile material for weapons production.

However, the expert website 38 North in a Monday image analysis concluded that operations at the reactor might have either been temporarily suspended or greatly reduced in recent months to permit maintenance work necessitated by recent flooding, the Associated Press reported.

An uninterrupted stream of water from the river is used to cool the graphite reactor. The July 2013 flood caused the principal channel of the Kuryong River to divert away from the reactor's water supply and potentially damaged pipes that had been laid on the river bottom, said the analysis by 38 North, a project of the U.S.-Korea Institute at Johns Hopkins University.

Between December and February, the North appears to have quickly finished "major water channel excavations and dam construction," wrote 38 North image expert Nick Hansen. The reactor seems to have started operating again by mid-February.

The Kuryong River supplies cooling water to both the graphite reactor and a newer, experimental light-water reactor that is almost completed, according to 38 North.

"Despite these short-term fixes, the danger posed by an unreliable supply of water for the Yongbyon reactors remains, particularly since the channels and dam constructed are made from sand and could be washed away by future floods," Hansen wrote.

A number of international nuclear specialists have raised concerns about a possible reactor meltdown at Yongbyon given North Korea's relative inexperience with reactors and the country's international isolation and poverty.

"These recent problems should be a wake-up call for Northeast Asia," 38 North editor Joel Wit said to AP.

Note to our Readers

GSN ceased publication on July 31, 2014. Its articles and daily issues will remain archived and available on NTI’s website.

NTI Analysis

  • 2016 NTI Nuclear Security Index Report

    Jan. 14, 2016

    The NTI Nuclear Security Index is a first-of-its-kind public benchmarking project of nuclear materials security conditions on a country-by-country basis. In 2016, the NTI Index assesses sabotage and cyber, for the first time.

  • Remarks at the Launch of the 2016 NTI Nuclear Security Index

    Jan. 14, 2016

    NTI Co-Chairman Sam Nunn highlighted the high-level findings of the 2016 NTI Nuclear Security Index and underscored the imperative of progress on nuclear security.

Country Profile

Flag of North Korea

North Korea

This article provides an overview of North Korea's historical and current policies relating to nuclear, chemical, biological and missile proliferation.

Learn More →