Top > Releases ･ Announcements > Fukushima Daiichi NPS Prompt Report > 2013 > Water Leak from the Underground Reservoirs in Fukushima Daiichi Nuclear Power Station (Follow-up Information No.28)
This is follow-up information regarding the water leak from the underground reservoirs at Fukushima Daiichi NPS.
The results of the sampling performed in the drain holes (at 12 locations) of the underground reservoir No.2-7 and the leakage detection holes (samples from 2 locations out of 8 were not obtained) of the underground reservoir No.2-4, 6 on April 9 are as follows.
The results for the drain holes and the leakage detection holes of the underground reservoir No.1 are previously announced.
There were no significant fluctuations with the results since the day before (April 8).
The results including nuclide analysis of iodine and cesium are posted at the page below.
URL:http://www.tepco.co.jp/en/nu/fukushima-np/f1/smp/index-e.html
- Water in the drain hole (in the northeast side) of the underground reservoir No.2
Sampling performed at 6:30 AM on April 9
Chloride concentration: 15ppm
Iodine 131: Below the detection limit (3.0×10-2 Bq/cm3)
Cesium 134: Below the detection limit (5.1×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.6×10-2 Bq/cm3)
All β: 6.2×101 Bq/cm3
- Water in the drain hole (in the southwest side) of the underground reservoir No.2
Sampling performed at 6:30 AM on April 9
Chloride concentration: 7ppm
Iodine 131: Below the detection limit (2.6×10-2 Bq/cm3)
Cesium 134: Below the detection limit (4.9×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.5×10-2 Bq/cm3)
All β: Below the detection limit (3.2×10-2 Bq/cm3)
- Water in the drain hole (in the northeast side) of the underground reservoir No.3
Sampling performed at 6:30 AM on April 9
Chloride concentration: 6ppm
Iodine 131: Below the detection limit (2.8×10-2 Bq/cm3)
Cesium 134: Below the detection limit (5.5×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.9×10-2 Bq/cm3)
All β: 4.2×10-2 Bq/cm3
- Water in the drain hole (in the southwest side) of the underground reservoir No.3
Sampling performed at 6:30 AM on April 9
Chloride concentration: 4ppm
Iodine 131: Below the detection limit (2.6×10-2 Bq/cm3)
Cesium 134: Below the detection limit (5.3×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.9×10-2 Bq/cm3)
All β: 7.7×10-2 Bq/cm3
- Water in the drain hole (in the northeast side) of the underground reservoir No.4
Sampling performed at 6:30 AM on April 9
Chloride concentration: 10ppm
Iodine 131: Below the detection limit (2.4×10-2 Bq/cm3)
Cesium 134: Below the detection limit (5.3×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.8×10-2 Bq/cm3)
All β: 6.7×10-2 Bq/cm3
- Water in the drain hole (in the southwest side) of the underground reservoir No.4
Sampling performed at 6:30 AM on April 9
Chloride concentration: 7ppm
Iodine 131: Below the detection limit (2.5×10-2 Bq/cm3)
Cesium 134: Below the detection limit (5.1×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.7×10-2 Bq/cm3)
All β: Below the detection limit (3.2×10-2 Bq/cm3)
- Water in the drain hole (in the northeast side) of the underground reservoir No.5
Sampling performed at 6:30 AM on April 9
Chloride concentration: 6ppm
Iodine 131: Below the detection limit (2.2×10-2 Bq/cm3)
Cesium 134: Below the detection limit (5.0×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.8×10-2 Bq/cm3)
All β: 3.1×10-1 Bq/cm3
- Water in the drain hole (in the southwest side) of the underground reservoir No.5
Sampling performed at 6:30 AM on April 9
Chloride concentration: 7ppm
Iodine 131: Below the detection limit (2.5×10-2 Bq/cm3)
Cesium 134: Below the detection limit (4.8×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.5×10-2 Bq/cm3)
All β: Below the detection limit (3.2×10-2 Bq/cm3)
- Water in the drain hole (in the northeast side) of the underground reservoir No.6
Sampling performed at 6:30 AM on April 9
Chloride concentration: 9ppm
Iodine 131: Below the detection limit (2.5×10-2 Bq/cm3)
Cesium 134: Below the detection limit (5.0×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.5×10-2 Bq/cm3)
All β: Below the detection limit (3.2×10-2 Bq/cm3)
- Water in the drain hole (in the southwest side) of the underground reservoir No.6
Sampling performed at 6:30 AM on April 9
Chloride concentration: 5ppm
Iodine 131: Below the detection limit (2.6×10-2 Bq/cm3)
Cesium 134: Below the detection limit (5.2×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.8×10-2 Bq/cm3)
All β: 4.4×10-2 Bq/cm3
- Water in the drain hole (in the northeast side) of the underground reservoir No.7
Sampling performed at 6:30 AM on April 9
Chloride concentration: 7ppm
Iodine 131: Below the detection limit (2.2×10-2 Bq/cm3)
Cesium 134: Below the detection limit (4.9×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.6×10-2 Bq/cm3)
All β: Below the detection limit (3.2×10-2 Bq/cm3)
- Water in the drain hole (in the southwest side) of the underground reservoir No.7
Sampling performed at 6:30 AM on April 9
Chloride concentration: 7ppm
Iodine 131: Below the detection limit (2.7×10-2 Bq/cm3)
Cesium 134: Below the detection limit (4.9×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.9×10-2 Bq/cm3)
All β: Below the detection limit (3.2×10-2 Bq/cm3)
- Water in the leakage detection hole (in the northeast side) of the underground reservoir No.2
Sampling performed at 8:15 AM on April 9
Chloride concentration: 390ppm
Iodine 131: Below the detection limit (8.4×10-2 Bq/cm3)
Cesium 134: Below the detection limit (6.8×10-2 Bq/cm3)
Cesium 137: 1.4×10-1 Bq/cm3
All β: 5.4×103 Bq/cm3
- Water in the leakage detection hole (in the southwest side) of the underground reservoir No.2
Sampling performed at 8:20 AM on April 9
Chloride concentration: 12ppm
Iodine 131: Below the detection limit (3.0×10-2 Bq/cm3)
Cesium 134: Below the detection limit (5.4×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.8×10-2 Bq/cm3)
All β: 2.3×100 Bq/cm3
- Water in the leakage detection hole (in the northeast side) of the underground reservoir No.3
Sampling performed at 8:55 AM on April 9
Chloride concentration: 5ppm
Iodine 131: Below the detection limit (2.3×10-2 Bq/cm3)
Cesium 134: Below the detection limit (5.0×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.7×10-2 Bq/cm3)
All β: 4.9×10-2 Bq/cm3
- Water in the leakage detection hole (in the southwest side) of the underground reservoir No.3
Sampling performed at 8:50 AM on April 9
Chloride concentration: 430ppm
Iodine 131: Below the detection limit (5.9×10-2 Bq/cm3)
Cesium 134: Below the detection limit (6.6×10-2 Bq/cm3)
Cesium 137: Below the detection limit (7.9×10-2 Bq/cm3)
All β: 1.6×103 Bq/cm3
- Water in the leakage detection hole (in the northeast side) of the underground reservoir No.4
Sampling performed at 9:00 AM on April 9
Chloride concentration: 12ppm
Iodine 131: Below the detection limit (2.7×10-2 Bq/cm3)
Cesium 134: Below the detection limit (5.2×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.6×10-2 Bq/cm3)
All β: 2.0×10-1 Bq/cm3
- Water in the leakage detection hole (in the southwest side) of the underground reservoir No.4
*The data is not obtained since the sample necessary for the analysis was not obtained.
- Water in the leakage detection hole (in the northeast side) of the underground reservoir No.6
Sampling performed at 9:15 AM on April 9
Chloride concentration: 9ppm
Iodine 131: Below the detection limit (3.0×10-2 Bq/cm3)
Cesium 134: Below the detection limit (5.2×10-2 Bq/cm3)
Cesium 137: Below the detection limit (6.9×10-2 Bq/cm3)
All β: 5.9×10-2 Bq/cm3
- Water in the leakage detection hole (in the southwest side) of the underground reservoir No.6
*The data is not obtained since the sample necessary for the analysis was not obtained.
© Tokyo Electric Power Company Holdings, Inc.
