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.27)
This is follow-up information regarding the water leak from the underground reservoirs at Fukushima Daiichi NPS.
The additional results of the sampling performed in the leakage detection holes (at 2 locations) and the drain holes (at 2 locations) of the underground reservoir No.1 in the afternoon on April 9 are as follows. The sampling performed in the leakage detection hole (in the northeast side) of the underground reservoir No.1 in the afternoon on April 8 has been also analyzed and the results are reported here.
- Water in the leakage detection hole (in the northeast side) of the underground reservoir No.1
Sampling performed at 1:40 PM on April 9
Chloride concentration: 1100ppm
Iodine 131: Below the detection limit (1.3×10-1 Bq/cm3) (newly reported)
Cesium 134: Below the detection limit (1.8×10-1 Bq/cm3) (newly reported)
Cesium 137: Below the detection limit (8.6×10-2 Bq/cm3) (newly reported)
Antimony 125: 2.1×101 Bq/cm3 (newly reported)
Ruthenium 106: 1.5×100 Bq/cm3 (newly reported)
All β: 1.5×104 Bq/cm3 (newly reported)
Sampling performed at 2:01 PM on April 8
Chloride concentration: 8ppm
Iodine 131: Below the detection limit (3.0×10-2 Bq/cm3) (newly reported)
Cesium 134: Below the detection limit (5.4×10-2 Bq/cm3) (newly reported)
Cesium 137: Below the detection limit (6.9×10-2 Bq/cm3) (newly reported)
All β: 4.7×10-2 Bq/cm3 (newly reported)
- Water in the leakage detection hole (in the southwest side) of the underground reservoir No.1
Sampling performed at 1:20 PM on April 9
Chloride concentration: 9ppm
Iodine 131: Below the detection limit (2.8×10-2 Bq/cm3) (newly reported)
Cesium 134: Below the detection limit (5.0×10-2 Bq/cm3) (newly reported)
Cesium 137: Below the detection limit (6.9×10-2 Bq/cm3) (newly reported)
All β: 6.8×10-2 Bq/cm3 (newly reported)
- Water in the drain hole (in the northeast side) of the underground reservoir No.1
Sampling performed at 5:40 PM on April 9
Chloride concentration: 7ppm
Iodine 131: Below the detection limit (2.7×10-2 Bq/cm3) (newly reported)
Cesium 134: Below the detection limit (5.5×10-2 Bq/cm3) (newly reported)
Cesium 137: Below the detection limit (6.8×10-2 Bq/cm3) (newly reported)
All β: 1.1×10-1 Bq/cm3 (newly reported)
- Water in the drain hole (in the southwest side) of the underground reservoir No.1
Sampling performed at 5:40 PM on April 9
Chloride concentration: 14ppm
Iodine 131: Below the detection limit (3.1×10-2 Bq/cm3) (newly reported)
Cesium 134: Below the detection limit (5.4×10-2 Bq/cm3) (newly reported)
Cesium 137: Below the detection limit (6.9×10-2 Bq/cm3) (newly reported)
All β: 6.1×10-2 Bq/cm3 (newly reported)
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