An underwater robot captured images of lava-like lumps inside a damaged reactor at
Japan's crippled Fukushima nuclear plant, spotting for the first time what is believed to be nuclear fuel that melted six years ago.
Plant operator Tokyo Electric Power Co said the robot found large amounts of lava-like debris,
apparently melted fuel that flowed out of the core into the primary containment vessel of the Unit 3 reactor at Fukushima. The plant was destroyed by a massive earthquake and tsunami in March 2011.
Experts have said the fuel melted and much of it fell to the chamber's bottom. TEPCO spokesman Takahiro Kimoto said it was the first time a robot camera has captured what is believed to be the melted fuel.