Fukushima Daiichi NPS Prompt Report 2013

This is follow-up information regarding the water leak from the underground reservoirs at Fukushima Daiichi NPS.

We conducted additional nuclide analysis of the leakage detector hole water at the Underground Reservoir 3, which locates next to the east side of the Underground Reservoir 2.
The analyzed results are as follows.

[Underground Reservoir No.3: Leakage detector hole water, northeast side (sampled at 9:50PM, April 6)]
[Results]
-Chloride concentration: Below 1ppm
-I-131: N.D（Below detection limit）( Detection limit:2.7×10^-2Bq/cm3）
-Cs-134: N.D（Detection limit:5.2×10^-2Bq/cm3）
-Cs-137: N.D（Detection limit:6.7×10^-2Bq/cm3）

[Underground Reservoir No.3: Leakage detector hole water, southwest side (sampled at 10:20PM, April 6)]
[Results]
-Chloride concentration: 350ppm
-I-131: N.D ( Detection limit:6.6×10^-2Bq/cm3）
-Cs-134: N.D（Detection limit:6.5×10^-2Bq/cm3）
-Cs-137: N.D（Detection limit:7.9×10^-2Bq/cm3）

We will announce the all βnuclide analysis results as soon as they have been analyzed.
We have not confirmed water level decrease at 12:00 AM on April 7 (The water level of the reservoir: 95.1%).
 
<Press Conference Announcement>
From 10:00AM, April 7, we will explain the situation of the Underground Reservoir 3 at Fukushima Daiichi NPS at the provisional press conference held at our headquarter office and Fukushima Office. We would like to announce the details individually.