Tepco failed in shutting up retained water even with cement / Water level becomes back only within 2.5 hours

(Before It's News)

Photo : Injecting cement and grout to underground trench. Taken on 11/25/2014. 

Following up this article.. Retained water underground temperature went up by 10℃ near Reactor 2 / Tepco “Still investigating the cause” [URL]

Even cement couldn’t shut up the underground trench, Tepco reported on 11/27/2014.

There are underground trenches connected to each crippled reactor building. Each one of them retains extremely highly contaminated water and it is assumed that the water is leaking to the ground and the sea. For example, the underground trench of Reactor 2 retains 5,000 t of contaminated water, the one of Reactor 3 retains 6,000 t as Tepco reports. In order to pump up the contaminated water, it is necessary to separate those trenches from the buildings.

After they admitted the frozen water wall failed, Tepco tried to fill the underground trench with cement and grout.

They completed filling one of the joint part between the trench and Reactor 2 T/B (Turbine Building) on 11/6/2014 and pumped up the retained water of the trench on 11/17/2014.

By pumping up the water for 6 hours, they managed to reduce the retained water level by 20cm. However the water level went back to the previous level only 2.5 hours after turning off the pump.

Also, the water temperature jumped up to suggest the water coming from Reactor 2 T/B is heated by something. The largest increase in temperature was approx. 35℃ within 4 days (-27℃ → 8℃).

It became clear that even if they fill the trench with cement, contaminated water, which contains the direct leakage of coolant water, would keep flowing into. The filling cement would make it even more difficult to pump up the water. At this moment Tepco is not announcing they are going to change the plan.

http://www.tepco.co.jp/nu/fukushima-np/roadmap/images/d141127_07-j.pdf

http://photo.tepco.co.jp/date/2014/201411-j/141125-01j.html

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