An internal investigation by the robot of Unit 1, which had been postponed for the removal of "fuel debris" that had melted down in the accident at TEPCO's Fukushima Daiichi Nuclear Power Station, will begin on the 12th of this month.
The internal investigation of the containment vessel of Fukushima Daiichi Nuclear Power Plant Unit 1 was originally planned to start in fiscal 2019, but it took time to prepare in advance and was postponed.
According to TEPCO, the survey will start on the 12th of this month, using six types of robots with different functions to measure the thickness and distribution of sediments that are thought to be in the water inside the containment vessel by ultrasonic waves for more than half a year. In addition, a small amount is taken as a sample.
It means that remote-controlled robots are also used to install the cover of the passage so that the robot can move smoothly in the water.
At the Fukushima Daiichi nuclear power plant, of the three meltdown units, deposits that appear to be "fuel debris" were confirmed at Units 2 and 3, but not yet confirmed at Unit 1, according to this survey. It will be interesting to see if you can get a clue for taking it out.
Keisuke Matsuo, a risk communicator of TEPCO's Fukushima Daiichi Decommissioning Promotion Company, said at a press conference on the 6th, "We will use six types of equipment to acquire various information and consider procedures for extracting debris." did.