On June 8th, 2011, during the patrol of emergency underground tanks of
High-voltage Start-up Transformer*, when discharging storage water in the
tank, approximately at 6:10 pm a TEPCO employee has found and confirmed oil
leakage to the sea around the water discharge canal of Unit 3 and 4,
Fukushima Daini Nuclear Power Station. We reported the issue to Futaba
Wide-area Fire Headquarters and Fukushima Coastguard Office.
Currently we stopped discharging the storage water. And we put oil
adsorption mattress to prevent oil spreading and preparing installing oil
The cause of the leakage and its details such as volume and status are
*High-voltage Start-up Transformer
A transformer supplying offsite power into the power station when start-up
and shut-down of the plant.
Oil discharge found around water discharge canal of Unit 3,4