New Video From Fukushima Nuclear Power Plant Shows Containment Vessel Dome Amid Debris

The video was shot on Friday by an unmanned micro-helicopter, the Tarantula-Hawk, called the T-Hawk for short.

The bright yellow dome of the steel containment vessel at Unit 4, Fukushima Daiishi nuclear power plant (FDI) is clearly visible amid the pulverized remains of the building in a new video released by the Tokyo Electric Power Company.

The dome is first seen approximately two minutes and thirty seconds into the three-and-a-half-minute video.

The containment vessel is 60-feet high and 16-feet wide. Made of hardened steel that is between four and eight inches thick, the integrity of the containment vessel is critical in preventing enormous quantities of radioactive material from escaping into the environment.

The dome in Unit 4, however, was removed in November 2010 and the fuel removed for reactor maintenance and to add new fuel rods. All of the rods from the fuel core were put into the spent fuel pool above the reactor at that time. According to a report by the Congressional Research Service, there are more fuel rods in the Unit 4 fuel pool than at any of the five other reactors.

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