Top > Releases ･ Announcements > Fukushima Daiichi NPS Prompt Report > 2013 > Earthquake Occurred on May 18, 2013 (Fukushima Daiichi and Daini Nuclear Power Stations) (Follow-up Information No.2)
This is a follow-up report on the statuses of Fukushima Daiichi and Daini Nuclear Power Stations after the earthquake occurred in the offshore of Fukushima Prefecture (M5.9) at around 2:48 PM on May 18.
At around 4:10 PM in Fukushima Daiichi Nuclear Power Station, a TEPCO employee found water dropping from an overflow pipe of Units 5-6 RO treated water tank (D7 tank) where the leakage was found yesterday on the site patrol after the earthquake.
As for the water overflowed from this tank, the leakage has stopped after closing the valve on the same day.
With regard to the treated water from this tank, the results of the nuclide analysis performed yesterday were found below the detection limits.
(Previously announced)
Regarding the treated water dropping from an overflow pipe of Units 5-6 RO treated water tank, the leakage area is estimated to be about 2 m x about 2 m and the leakage amount is estimated to be about 4 liters.
As of 7:36 PM, the water dropping from the overflow pipe was stopped.
The water dropping is assumed to be caused by the earthquake occurred at around 2:48 PM today since the treated water tank was at full capacity from yesterday.
Measures will be implemented to lower the water level of the tank.
© Tokyo Electric Power Company Holdings, Inc.
