Fukushima Daiichi nuclear power plant No. 1 fuel pool underwater image first public release Debris accumulation August 30th 4:04
An underwater image of the spent fuel pool on the top floor of TEPCO's Fukushima Daiichi NPS No. 1 that caused the meltdown was released for the first time, and it was confirmed that debris from hydrogen explosions had accumulated. .
Of the three reactors that caused meltdown in the accident eight years ago, Unit 1 has not yet removed the debris scattered by the hydrogen explosion, and the spent fuel pool on the top floor has 392 nuclear fuels. Is left behind.
TEPCO conducted the first survey to check the status of the pool and released a photo on the 29th.
From the image, it was confirmed that several cables dropped from the top near the center of the pool and some of them were submerged, and debris such as concrete pieces accumulated on the rack that stores underwater fuel. Was confirmed.
TEPCO will analyze the photos and consider how to remove debris for fuel removal.
A photo of a huge lid at the top of the containment vessel was also released.
The total weight of the triple-structured lid is over 500 tons, and it has been confirmed that it has deviated from photography three years ago.
The gaps appear black in the photo, and TEPCO plans to analyze the tilt of the lid that has shifted in the future.
In addition, the results of continuous measurement of the radiation dose around the lid were also announced, with the highest at 1.97 Sv per hour.
TEPCO wants to put together measures to reduce the radiation dose in order to proceed with decommissioning work.