Freezing lands around Fukushima factory

On March 30, Japan 's Nuclear Administration (NRA) approved a plan to freeze the land around damaged reactors at Fukushima.

Accordingly, the NRA requires Tokyo Electric Power Company (TEPC) to start operating the cooling wall to prevent groundwater circuits from entering high-level radioactive structures that could lead to leaks. radiation.

Speaking to reporters, NRA President Shunichi Tanaka said that in addition to preventing groundwater from entering buildings, we also wanted to remove all the water inside the contaminated buildings.

Model of wall cooling system around the number 1 to 4 reactors at Fukushima nuclear power plant.(Source: Nuclear News).

"I hope this plan will be effective, providing a basis for future steps to prevent radioactive leakage , " Mr. Tanaka said.

However, Mr. Tanaka also warned that the amount of groundwater inside the wall was greatly reduced while contaminated water was siege that could cause contaminated water to seep out.

In June 2014, TEPCO began deploying construction of walls and chillers related to the No.1 to No. 4 reactors at the Fukushima nuclear power plant. These reactors were paralyzed after the earthquake and tsunami in March 2011.

Just completed in February, this cooling wall system is 1.5 km long, including solution pipes that freeze the land surrounding the eastern face (bordering the sea) and the west side of the four reactors.

It is expected that this process will last for 8 months and will greatly reduce the amount of radioactive contaminated groundwater from here to about 50 tons. To build this system, the Japanese government spent about 35 billion yen (nearly 310 million USD).