Decommissioning work at the Fukushima Daiichi nuclear power plant has suffered a setback after a robot sent in to a damaged reactor to locate melted fuel stalled hours into its mission and had to be abandoned.
The plant’s operator, Tokyo Electric Power (Tepco), said the robot stopped moving on Friday during its first inspection of the containment vessel inside reactor No 1, one of the three reactors that suffered meltdown after the plant was struck by an earthquake and tsunami in March 2011.
Tepco, which recently conceded that the technology for robots to retrieve the nuclear fuel had yet to be developed, said on Monday it would cut the cables to the stranded robot and postpone a similar inspection using a separate device.
Developed by Hitachi-GE Nuclear Energy and the International Research Institute for Nuclear Decommissioning, the robot was supposed to be able to function for about 10 hours even when exposed to radiation at levels that would cause ordinary electronic devices to malfunction.
The “transformer” robot, which can alter its shape depending on its surroundings, was sent in to photograph the inside of the reactor containment vessel and record temperatures and radiation levels.