Fukushima Daiichi NPS Prompt Report 2013

This is a follow-up report on the statuses of steam-like gas found wafting through the air near the central part of the fifth floor (equipment storage pool side) of Unit 3 on July 18.

Please refer to the following 3rd and 4th dust analysis result, sampled at the north side of a space above the reactor at Unit 3 Reactor Building (near the location where the steam-like gas was found) and at the northeast side of a space above the reactor (location where a sampling is performed regularly).

All results today were equivalent to or smaller than the previous results (obtained on July 18), and between the variation ranges of the past half year.

<3rd sampling: Dust analysis result at the north side of a space above the reactor at Unit 3 Reactor Building (vertical direction)>
Iodine 131: below the detection limit
Cesium 134: 9.3×10^-6Bq/cm³
Cesium 137: 2.3×10^-5Bq/cm³

<3rd sampling: Dust analysis result at the north side of a space above the reactor at Unit 3 Reactor Building (horizontal direction)>
Iodine 131: below the detection limit
Cesium 134: 1.1×10^-5Bq/cm³
Cesium 137: 2.3×10^-5Bq/cm³

<4th sampling: Dust analysis result at the north side of a space above the reactor at Unit 3 Reactor Building (vertical direction)>
Iodine 131: below the detection limit
Cesium 134: 1.4×10^-5Bq/cm³
Cesium 137: 3.3×10^-5Bq/cm³

<4th sampling: Dust analysis result at the north side of a space above the reactor at Unit 3 Reactor Building (horizontal direction)>
Iodine 131: below the detection limit
Cesium 134: 1.8×10^-5Bq/cm³
Cesium 137: 2.9×10^-5Bq/cm³

<Dust analysis result at the northeast side of a space above the reactor at Unit 3 Reactor Building (vertical direction)>
Iodine 131: below the detection limit
Cesium 134: below the detection limit
Cesium 137: below the detection limit

<Dust analysis result at the northeast side of a space above the reactor at Unit 3 Reactor Building (horizontal direction)>
Iodine 131: below the detection limit
Cesium 134: below the detection limit
Cesium 137: below the detection limit

Please visit our web page for the sampling results.
http://www.tepco.co.jp/en/nu/fukushima-np/handouts/index-e.html

We will continue to monitor the status closely.