Fukushima Daiichi NPS Prompt Report 2013

This is follow-up information regarding the water leak from the underground reservoir No. 2 in Fukushima Daiichi NPS.

On April 6, we conducted nuclide analysis of the underground reservoirs.
The results are as follows.

[Underground Reservoir No.1: Drain hole water (sampled at 9:15AM, April 6)]
[Results]
-All β: 6.9×10^-2Bq/cm³（Detection limit:3.3×10^-2Bq/cm³）
-Chloride concentration: 13ppm

[Underground Reservoir No.2: Leakage detector hole water, northeast side (sampled at 1:56PM, April 6)]
[Results]
-All β: 6.9×10³Bq/cm³（Detection limit:3.1×10⁰Bq/cm³）
-Chloride concentration: 500ppm

[Underground Reservoir No.2: Leakage detector hole water, southwest side (sampled at 2:17PM, April 6)]
*Data is not obtained, since the amount of the water necessary for sampling was not obtained.

[Underground Reservoir No.2: Drain hole water, southwest side (sampled at 9:20AM, April 6)]
[Results]
-All β: 4.8×10^-2Bq/cm³（Detection limit:3.3×10^-2Bq/cm³）
-Chloride concentration: 8ppm

[Underground Reservoir No.2: Drain hole water, northeast side (sampled at 9:25AM, April 6)]
[Results]
-All β: 4.3×10¹Bq/cm³（Detection limit:3.3×10^-2Bq/cm³）
-Chloride concentration: 14ppm

[Underground Reservoir No.3: Drain hole water (sampled at 9:30AM, April 6)]
[Results]
-All β: 1.1×10^-1Bq/cm³（Detection limit:3.3×10^-2Bq/cm³）
-Chloride concentration: 10ppm

[Underground Reservoir No.4: Drain hole water (sampled at 9:45AM, April 6)]
[Results]
-All β: Below detection limit（Detection limit:3.3×10^-2Bq/cm³）
-Chloride concentration: 9ppm

We will conduct additional sampling for the Underground Reservoir No.3 leakage detector hole water to check the leakage from the Underground Reservoir No.3.

The attached file is the nuclide analysis results including Iodine and Cesium.