TEPCO announced on June 30 that the "Warrior" robot from iRobot will vacuum clean the floor of the Reactor 3 reactor building in the area where the high radiation has been detected.
The US-made "Warrior" and Japanese-made vacuum cleaners. (Both Hitachi and Toshiba, TEPCO's affiliate companies at Fukushima I, manufactures vacuum cleaners as well as nuclear reactors...)
The press handout on June 30 says:
Accumulated sand?? From where?
"Since radiation dose on the floor is high, we plan to conduct cleaning from July 1 in order to reduce the radiation exposure for the workers, removing the accumulated sand with vacuum cleaners and robots."