Fukushima Daiichi NPS Prompt Report 2013

We would like to make an announcement on sampling results regarding the water leak at a tank in the H4 area in Fukushima Daiichi Nuclear Power Station (sampled at the south water outlet and the drainage channel on September 12).

Result of all β obtained at the point B-3 (at the point before reaching the junction of the drainage channels B and C, 2400 Bq/L) was higher than that of in the past (380 - 920 Bq/L). We consider that the detection level was high due to the remaining water after cleaning of the drainage channel B, where water of the point B-3 has accumulated.

With regard to the result of all β obtained at the point C-2, which was increased yesterday, it was below the detection limit value (11 Bq/L) this time. We attributed this result to the work performed at the upstream side of the point C-2. In the other locations, no remarkable change was found compared to the previous measurement results.

We could not perform the sampling at the point B-1 and the point B-2 of the drainage channel B, since there was no water left.

We are determined to continue analyses and monitor the situation.

For the past sampling results, please refer to the following page on our website:
http://www.tepco.co.jp/en/nu/fukushima-np/f1/smp/index-e.html