Blog Archive

Tuesday, 14 July 2015

Contamination of groundwater and sea discharges

The tritium contamination of the control well No. 10 upstream of the reactors continues to rise and has just beaten two new records with 1,800 Bq / L (sampling of 6 July) and 1,900 Bq / L (sampling of 9 July).

These are the fourth and fifth successive records.
This exceeds the limit for dumping at sea, which is 1 500 Bq / L, but TEPCO relies on dilution with water from other wells:
The tritium contamination of the waste water dumped into the sea is around 100 Bq / L.

Further upstream, the tritium contamination of groundwater can reach 20 000 Bq / L in the E10 control well (sampling of 7 July).

At the foot of the reactors, the tritium contamination also broke a record in the control well No. 3 with 8,500 Bq / L (sampling of 1 July)

The cesium also broke its own record in the control well 1-8 with respectively 170 and 670 Bq / L for cesium-134 and -137 respectively (levy of 6 July).

Cesium contamination of the seawater at the mouth of the port continues to oscillate.

Furthermore, Fukushima Dairy reported that the frozen underground wall in the testing phase at the foot of reactor No. 4 does not take after two months of cooling. This is bad news because TEPCO will not be able to limit groundwater infiltration leaking.

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