Upon entering a corridor beneath the damaged No. 4 reactor, they found a black, lava-like substance flowing from the reactor core, resembling a man-made volcano.
Among these hardened masses, one stood out and was nicknamed "Elephant's Foot" due to its resemblance to the foot of a large mammal.
The Elephant's Foot is a solid mass of melted nuclear fuel mixed with concrete, sand, and core sealing material.
At the time of its discovery, the Elephant's Foot was emitting approximately 8,000 to 10,000 roentgens, or 80 to 100 grays, per hour, delivering a lethal dose of radiation (4.5 grays) within just five minutes.
Among these hardened masses, one stood out and was nicknamed "Elephant's Foot" due to its resemblance to the foot of a large mammal.
The Elephant's Foot is a solid mass of melted nuclear fuel mixed with concrete, sand, and core sealing material.
At the time of its discovery, the Elephant's Foot was emitting approximately 8,000 to 10,000 roentgens, or 80 to 100 grays, per hour, delivering a lethal dose of radiation (4.5 grays) within just five minutes.


