Top > Releases ･ Announcements > Fukushima Daiichi NPS Prompt Report > 2013 > Water Leak at a Tank in the H4 area in Fukushima Daiichi Nuclear Power Station (Follow-up Information 11)
This is follow-up information on the "water leak at a tank in the H4 area in Fukushima Daiichi Nuclear Power Station" found on August 19.
We would like to announce radioactivity density analysis results on seawater near the exit of the drainage channel of the south water outlet, water at the junction of the drainage channels B and C near the H4 area (previously referred to as "water of the side ditch in front of the core warehouse") and water in the drainage channel B, sampled yesterday (on August 22), as follows.
No remarkable change was found in the latest analysis results on seawater near the exit of the drainage channel of the south water outlet and water at the junction of the drainage channels B and C near the H4 area, compared to the previous analysis results on the samples taken previously (on August 21).
We conducted radioactivity density analysis on water in the drainage channel B for the first time.
<Seawater near the south water outlet (near the exit of the drainage channel) (sampling performed at 11:45 AM on August 22)>
Cesium-134:2.3Bq/L (2.3×10-3Bq/cm3)
Cesium-137:3.8Bq/L (2.2×10-3Bq/cm3)
All β:Below the detection limit value [the detection limit value: 21Bq/L (2.1×10-2Bq/cm3)]
<Water at the junction of the drainage channels B and C near the H4 area (sampling performed at 12:10 PM on August 22)>
Cesium-134:Below the detection limit value [the detection limit value: 18Bq/L (1.8×10-2Bq/cm3)]
Cesium-137:Below the detection limit value [the detection limit value: 27Bq/L (2.7×10-2Bq/cm3)]
All β:200Bq/L (2.0×10-1Bq/cm3)
<Water in the drainage channel B (at the location found with a high dose rate on August 21 (B-1)) (sampling performed at 3:55 PM on August 22)>(new)
Cesium-134:58Bq/L (5.8×10-2Bq/cm3)
Cesium-137:150Bq/L (1.5×10-1Bq/cm3)
All β:330Bq/L (3.3×10-1Bq/cm3)
<Water in the drainage channel B (upstream of B-1) (sampling performed at 4:10 PM on August 22)>(new)
Cesium-134:35Bq/L (3.5×10-2Bq/cm3)
Cesium-137:49Bq/L (4.9×10-2Bq/cm3)
All β:71Bq/L (7.1×10-2Bq/cm3)
<Water in the drainage channel B (downstream of B-1) (sampling performed at 3:40 PM on August 22)>(new)
Cesium-134:Below the detection limit value [the detection limit value: 20Bq/L (2.0×10-2Bq/cm3)]
Cesium-137:Below the detection limit value [the detection limit value: 27Bq/L (2.7×10-2Bq/cm3)]
All β:250Bq/L (2.5×10-1Bq/cm3)
<Water before reaching the junction of the drainage channels B and C (upstream of the junction) (sampling performed at 3:25 PM on August 22)>(new)
Cesium-134:Below the detection limit value [the detection limit value: 19Bq/L (1.9×10-2Bq/cm3)]
Cesium-137:39Bq/L (3.9×10-2Bq/cm3)
All β:580Bq/L (5.8×10-1Bq/cm3)
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
© Tokyo Electric Power Company Holdings, Inc.
