Tepco plans to pump up groundwater and discharge it to the sea

 

200 ~ 400 m3 of groundwater flows into the basement floors of reactor 1 ~ 4 on the daily basis.
Tepco still injects 600m3 of water to reactor 1 ~3 everyday, contaminated water increases by 800 ~ 1000 m3 everyday. Currently, 98,000 m3 of contaminated water is under reactor 1 ~ 4.

To reduce groundwater to flow into the basement floors by half, Tepco is going to make 14 wells (30cm diameter, 32m deep) at 80 ~ 200 m far from the plants on the mountain side.
The pumped up water will be discharged to the sea directly, but they measured tritium from one of the three wells which Tepco made experimentally. METI states they want to ask local governments and Fisheries Cooperative Association for agreement to discharge the contaminated water.

 
福島第1原発:井戸で地下水くみ上げ 汚染水低減へ
毎日新聞 2012年04月23日 20時53分(最終更新 04月23日 21時18分)

政府と東京電力は23日、福島第1原発の建屋の地下に地下水が流れ込んで放射性物質による汚染水が増えるのを防ぐため、14本の井戸を掘って地下水をくみ上げ、直接海に流す方針を決めた。最大で1日当たり約400立方メートルとみられる地下水の流入を半分程度に減らせるという。
同日の政府・東電の中長期対策会議で報告された。これまでの汚染水の処理量は30万立方メートルを超え、現在も第1原発1〜4号機の原子炉建屋などの地下に約9万8000立方メートルの汚染水がたまっている。1〜3号機の原子炉冷却のため、1日当たり約600立方メートルを注水しているのに対し、地下水の流入は同200〜400立方メートルに達し、汚染水の低減には地下水の流入対策が鍵だった。
計画では、1〜4号機の原子炉建屋から80〜200メートル山側の高台に、井戸(直径30センチ、深さ32メートル)を14本掘り、今年秋から地下水のくみ上げを始める。ただし、試験的に掘った井戸3本のうちの1本の地下水では、ごく微量の放射性物質トリチウムが検出されたため、経済産業省は「海に流す前に地元自治体や漁協に理解を得たい」としている。

 

Tepco plans to pump up groundwater and discharge it to the sea

 

Tepco plans to pump up groundwater and discharge it to the sea2

 

Tepco plans to pump up groundwater and discharge it to the sea3

 
Source

 

 

 

About this site

This website updates the latest news about the Fukushima nuclear plant and also archives the past news from 2011. Because it's always updated and added live, articles, categories and the tags are not necessarily fitted in the latest format.
I am the writer of this website. About page remains in 2014. This is because my memory about 311 was clearer than now, 2023, and I think it can have a historical value. Now I'm living in Romania with 3 cats as an independent data scientist.
Actually, nothing has progressed in the plant since 2011. We still don't even know what is going on inside. They must keep cooling the crippled reactors by water, but additionally groundwater keeps flowing into the reactor buildings from the broken parts. This is why highly contaminated water is always produced more than it can circulate. Tepco is planning to officially discharge this water to the Pacific but Tritium is still remaining in it. They dilute this with seawater so that it is legally safe, but scientifically the same amount of radioactive tritium is contained. They say it is safe to discharge, but none of them have drunk it.

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