Tokyo Electric Power Company says high radiation levels, and high humidity, is slowing up robots being used to inspected the reactor buildings at Fukushima Daiichi.

In Reactor 2 building the humidity was so high it fogged the robot’s camera lens.

In Reactor 3, there is too much debris from the hydrogen gas explosion.  They will use another robot that can clear the debris, some of which weighs 100kg (220 pounds).