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» TEPCO wants to dump decontaminated water to the ocean

TEPCo wants to dump decontaminated water from the Fukushima No. 1 nuclear power plant into the ocean.

Frustrated at past efforts to deal with this vexing problem, it is in talks with government ministries to pump contaminated water found around the buildings on the plant site, process it to remove the radioactive materials and then release it into the Pacific Ocean.

The proposal is designed to reduce the volume of groundwater that is flowing into buildings that already hold contaminated water.

The plan would involve wells called subdrains that have been built around buildings on the plant site.

Before the 2011 Fukushima nuclear accident, the subdrains were used to pump out groundwater and dump it into the ocean as a means to lower the groundwater level.

But after the Great East Japan Earthquake in March 2011, the subdrains became unusable because the pumps were damaged and the groundwater had become contaminated with radioactive materials.
TEPCO officials plan to use the existing 27 subdrain wells and dig 15 additional wells to reduce the volume of contaminated water created to around 200 tons a day, or half the present level.

Processing equipment would be used to remove the radioactive cesium and strontium in the groundwater before the water is released into the sea.

Although TEPCO will seek the consent of local residents and fisheries cooperatives, a high-ranking official with a Fukushima fisheries cooperative said the utility may face an uphill road in gaining approval.

“The water close to the plant buildings is already contaminated,” the official said. “Fishermen are sure to raise objections to the plan so it will be difficult to gain their understanding.”
<Media Report>
Decontaminated water from Fukushima plant to be dumped into sea (Asahi Newspaper)

Tepco to collect toxic groundwater at Fukushima, dump in ocean after treatment (Japan Times)

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