Fukushima Daiichi Nuclear Power Plant to construct a seawall with a maximum length of 16 m September 14, 18:14 with a new assumption of a huge earthquake
Based on new assumptions in the event of a huge earthquake in the Japan Trench, it was found that the Fukushima Daiichi Nuclear Power Station could be hit by a tsunami that crosses the seawall under construction, and TEPCO has a higher maximum of 16. We have summarized the policy to build a metric seawall.
In April this year, the national study group newly showed the assumption that a huge earthquake would occur in the "Kuril Trench" and "Japan Trench" from off Hokkaido to off Iwate Prefecture.
According to TEPCO's analysis based on this, if a huge earthquake occurs in the Japan Trench, the maximum is 14.1 meters in the coastal area of Fukushima Daiichi Nuclear Power Plant Units 1 to 4, and the maximum in the south side of Unit 4. It turns out that a 15.3 meter tsunami could hit.
Currently, TEPCO is constructing a seawall with a height of 11 meters from the sea in the coastal areas of Units 1 to 4, and on the south side of Unit 4, a seawall with a maximum height of 12.8 meters has already been constructed. Although it has been completed, a tsunami that exceeds these will hit.
For this reason, we have put together a policy to construct a seawall with a maximum height of 16 meters from the sea from the coastal areas of Units 1 to 4 and the south side of Unit 4.
It is expected to be completed in 2023.
As measures already underway, TEPCO is constructing to close the entrance and exit of the reactor building, and is also deploying power supply cars and fire engines to cool nuclear fuel on high ground.
About 1000 tanks that store treated water from contaminated water are located on a hill on the land side, and the tsunami does not reach them.