North Korea ‘restarting nuclear bomb reactor’ after five-month shutdown

North Korea may be attempting to restart its main nuclear bomb fuel reactor after a five-month shutdown, a US research institute said today.

If true, the finding, which is based on recent commercial satellite imagery, will be an added worry for the United States and the North’s neighbours at a time of increasing animosity over recent US sanctions against the North and Pyongyang’s fury about a UN push to punish its alleged human rights abuses.

Activity at the five-megawatt Nyongbyon reactor is closely watched because North Korea is thought to have a handful of crude nuclear bombs, part of its efforts to build an arsenal of nuclear tipped missiles that could one day hit America’s mainland.

Nyongbyon, which has produced plutonium used for past nuclear test explosions, restarted in 2013 after being shuttered under a 2007 disarmament agreement. It has been offline since August.

Possible signs in satellite imagery from December 24 through January 11 that the reactor is in the early stages of being restarted include hot water drainage from a pipe at a turbine building that indicates steam from the reactor and growing snow-melt on the roofs of the reactor and turbine buildings.

The US-Korea Institute at Johns Hopkins School of Advanced International Studies, however, said that since the recent observation period was only about two weeks, it’s too soon to reach a definitive conclusion about what’s happening and more monitoring is needed. The institute’s website, 38 North, published the findings.