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.

FORBES: New Video From Fukushima Shows Containment Vessel Dome Amid Debris

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.

FORBES: New Video From Fukushima Shows Containment Vessel Dome Amid Debris