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Fukushima Daiichi’s radioactive water discharge pipe construction

December 22, 2021

TEPCO’s long-term plan to dump contaminated water into the Pacific has progressed closer to reality. Regulators have given initial approvals and with those, TEPCO has moved quickly to start this project.

Today TEPCO filed for official approval of the water discharge pipe construction.
In mid-December boring tests to examine the geologic status of the sea bed began. These were preceded by magnetic ground surveys. This work is needed to design and construct the discharge pipe TEPCO plans to use to dump contaminated water into the sea. TEPCO plans to have this discharge pipe completed by 2023.


TEPCO has insisted this water is safe and “clean” but admits it still contains some radioactive contamination. The plan has received plenty of criticism including local fishing and environmental groups, international environmental groups, and nearby countries who have all lodged formal complaints with the Japanese government.

Magnetic survey rig near the port of Fukushima Daiichi.
Geologic boring test rig pontoon in use outside the port at Fukushima Daiichi.
Location of discharge pipe at Fukushima Daiichi port
Diagram of the construction plan to dig the pipe route.
Location of the pipe route from land out to sea through the port area.

Some concerns about this siting exist. The port has been concreted over twice and had some other work done to attempt to reduce or isolate radioactive contamination that leaked into the port in the early years of the disaster. Digging through this to install the discharge pipe could resuspend these contaminants and fuel microparticles, releasing new environmental contamination to the sea.
Original TEPCO document in Japanese

December 27, 2021 Posted by | Fukushima 2021 | , | Leave a comment

Fukushima operators to use tunnels and pumps to release contaminated water into the sea

22 December 2021

The operator of Japan’s destroyed Fukushima nuclear power plant, Tokyo Electric Power (Tepco), has submitted plans to the country’s nuclear regulators to release contaminated water from the site into the sea.

According to Reuters, Tepco proposes to discharge the water via pumps and and underwater tunnels to a location about 1km offshore.

Tepco will process the water first to remove radioactive contamination, except for tritium, which cannot be removed.

Nearly 1.3 million tonnes of contaminated water have accumulated at the site – enough to fill 500 Olympic swimming pools.

The water has built up over the past ten years, after the site was ravaged by an earthquake and tsunami – causing the world’s worst nuclear disaster since Chernobyl.

Currently, the water is stored in huge tanks at an annual cost of around $880m, and space is running out.

Although international authorities support the water discharge effort, the plans do have raised concern from neighbours China and South Korea and worried both local farmers and the fishing industry.

The operator will continue to discuss the issue with residents and others before construction, set to start in the middle of next year.

December 27, 2021 Posted by | Fukushima 2021 | , , , | Leave a comment

Fukushima nuclear power plant plans seabed tunnel to discharge treated radioactive water into ocean

22 déc. 2021

The operator of Japan’s crippled Fukushima Daiichi nuclear power plant has unveiled plans to build an underwater tunnel to release treated radioactive water into the sea. The Tokyo Electric Power (Tepco) submitted detailed plans on December 21, 2021, to the nuclear regulation authority for approval. In 2011, a devastating earthquake and tsunami sparked a nuclear disaster on Japan’s northeastern coast. Nearly 1.3 million tonnes of contaminated water has to be processed to eliminate radioactive contamination, except for tritium, which cannot be removed. Japan’s plans to dump the treated water in the ocean have raised concerns among neighbouring China and South Korea, as well as farmers and fisherfolk.

December 23, 2021 Posted by | Fukushima 2021 | , , , , | Leave a comment