Article from NHK News :
" Tokyo Electric Power Company has begun using unmanned heavy equipment to remove radioactive rubble at the tsunami-hit Fukushima Daiichi nuclear plant.
Hydrogen explosions blew off the ceilings and walls of the Number One and Number Three reactor buildings. The debris is emitting hundreds of millisieverts of radiation per hour in some places, hindering the restoration work.
The utility started using remote-controlled power shovels and bulldozers to remove the rubble on Sunday afternoon.
Operators are using cameras attached to the equipment as well as 6 fixed cameras at the site to carry out the work from hundreds of meters away.
A lead-covered mobile operating room will be used to remove debris from places that cannot be reached by radio waves."
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