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 yesterday (July 18).

Please refer to the following dust analysis result, sampled at the north side of a space above the reactor at Unit 3 Reactor Building (sampled in a horizontal direction first time, sampled in a vertical direction and a horizontal direction second time) and at the northeast side of a space above the reactor (sampled in a vertical direction and a horizontal direction).

All results today were between the variation ranges of the past half year.

<1st 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^-4Bq/cm³
Cesium 137: 2.4×10^-4Bq/cm³

<1st sampling: Dust analysis result at the north side of a space above the reactor at Unit 3 Reactor Building (vertical direction)> (Previously announced)
Iodine 131: below the detection limit
Cesium 134: 4.0×10^-5Bq/cm³
Cesium 137: 7.1×10^-5Bq/cm³

<2nd 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: 1.2×10^-5Bq/cm³
Cesium 137: 1.7×10^-5Bq/cm³

<2nd 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: 1.5×10^-5Bq/cm³
Cesium 137: 4.9×10^-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: 5.3×10^-5Bq/cm³
Cesium 137: 9.9×10^-5Bq/cm³

<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: 1.3×10^-4Bq/cm³
Cesium 137: 2.7×10^-4Bq/cm³

<Recent dust analysis result at the northeast side of a space above the reactor at Unit 3 Reactor Building (sampled on July 4)> (Previously announced)
(Vertical direction)
Iodine 131: below the detection limit
Cesium 134: below the detection limit
Cesium 137: 3.6×10^-5Bq/cm³

(Horizontal direction)
Iodine 131: below the detection limit
Cesium 134: below the detection limit
Cesium 137: 2.5×10^-5Bq/cm³

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