Why dont the japanese use robots?

Why don't they use radio controlled robots (something like bomb-squad robots) to perform tasks that would be harmful/deadly to humans to accomplish?
The robots could weld and do all kinds of things if they where constructed right. I mean they have built advanced robots like ASIMO before, they should be able to build a custom robot that can do what they need.

The problem is TEPCO, who haven't even put anything as advanced as a guauge on the tanks so you can tell how much water is in them.