Fukushima Daiichi NPS Prompt Report 2013

This is follow-up information regarding the water leak from the underground reservoirs at Fukushima Daiichi NPS.

Today (April 14), chloride concentration analysis was performed in the drain holes of the underground reservoirs No.1-7 (at 14 locations) and the leakage detection holes (samples could not be collected at 2 out of 10 locations) of the underground reservoirs No.1-4 and 6. The results are as follows.

Compared to the analysis results on the previous day (April 13), the chloride concentration in the leakage detection hole (northeast) of the underground reservoir No.1 has increased. On the other hand, the chloride concentrations of the leakage detection hole (northeast) of the underground reservoir No.2 and the leakage detection hole (southwest) of the underground reservoir No.3 have decreased. No significant change was found in other locations.

The water level, etc. of the underground reservoirs will continue to be intensively monitored.

[Chloride concentration analysis results on April 14]

- Drain hole (northeast) of the underground reservoir No.1
Sampling performed at 7:30 AM on April 14
Chloride concentration: 14ppm

- Drain hole (southwest) of the underground reservoir No.1
Sampling performed at 7:30 AM on April 14
Chloride concentration: 4ppm

- Drain hole (northeast) of the underground reservoir No.2
Sampling performed at 7:40 AM on April 14
Chloride concentration: 10ppm

- Drain hole (southwest) of the underground reservoir No.2
Sampling performed at 7:40 AM on April 14
Chloride concentration: 6ppm

- Drain hole (northeast) of the underground reservoir No.3
Sampling performed at 7:50 AM on April 14
Chloride concentration: 7ppm

- Drain hole (southwest) of the underground reservoir No.3
Sampling performed at 7:50 AM on April 14
Chloride concentration: 4ppm

- Drain hole (northeast) of the underground reservoir No.4
Sampling performed at 8:00 AM on April 14
Chloride concentration: 9ppm

- Drain hole (southwest) of the underground reservoir No.4
Sampling performed at 8:00 AM on April 14
Chloride concentration: 8ppm

- Drain hole (northeast) of the underground reservoir No.5
Sampling performed at 8:10 AM on April 14
Chloride concentration: 6ppm

- Drain hole (southwest) of the underground reservoir No.5
Sampling performed at 8:10 AM on April 14
Chloride concentration: 6ppm

- Drain hole (northeast) of the underground reservoir No.6
Sampling performed at 8:20 AM on April 14
Chloride concentration: 11ppm

- Drain hole (southwest) of the underground reservoir No.6
Sampling performed at 8:20 AM on April 14
Chloride concentration: 7ppm

- Drain hole (northeast) of the underground reservoir No.7
Sampling performed at 8:30 AM on April 14
Chloride concentration: 5ppm

- Drain hole (southwest) of the underground reservoir No.7
Sampling performed at 8:30 AM on April 14
Chloride concentration: 8ppm

- Leakage detection hole (northeast) of the underground reservoir No.1
Sampling performed at 8:35 AM on April 14
Chloride concentration: 1320ppm

- Leakage detection hole (southwest) of the underground reservoir No.1
Sampling performed at 8:40 AM on April 14
Chloride concentration: 8ppm

- Leakage detection hole (northeast) of the underground reservoir No.2
Sampling performed at 8:55 AM on April 14
Chloride concentration: 92ppm

- Leakage detection hole (southwest) of the underground reservoir No.2
Sampling performed at 8:50 AM on April 14
Chloride concentration: 8ppm

- Leakage detection hole (northeast) of the underground reservoir No.3
Sampling performed at 9:10 AM on April 14
Chloride concentration: 9ppm

- Leakage detection hole (southwest) of the underground reservoir No.3
Sampling performed at 9:05 AM on April 14
Chloride concentration: 60ppm

- Leakage detection hole (northeast) of the underground reservoir No.4
Sampling performed at 9:25 AM on April 14
Chloride concentration: 10ppm

- Leakage detection hole (southwest) of the underground reservoir No.4
*Sampling was not performed since the amount of sample necessary for analysis could not be obtained.

- Leakage detection hole (northeast) of the underground reservoir No.6
Sampling performed at 9:35 AM on April 14
Chloride concentration: 7ppm

- Leakage detection hole (southwest) of the underground reservoir No.6
*Sampling was not performed since the amount of sample necessary for analysis could not be obtained.

Chloride concentration analysis results on the previous day (announced at 3:28 PM on April 13, 2013)

- Drain hole (northeast) of the underground reservoir No.1
Sampling performed at 5:10 AM on April 13
Chloride concentration: 17ppm

- Drain hole (southwest) of the underground reservoir No.1
Sampling performed at 5:10 AM on April 13
Chloride concentration: 8ppm

- Drain hole (northeast) of the underground reservoir No.2
Sampling performed at 5:20 AM on April 13
Chloride concentration: 13ppm

- Drain hole (southwest) of the underground reservoir No.2
Sampling performed at 5:20 AM on April 13
Chloride concentration: 8ppm

- Drain hole (northeast) of the underground reservoir No.3
Sampling performed at 5:30 AM on April 13
Chloride concentration: 8ppm

- Drain hole (southwest) of the underground reservoir No.3
Sampling performed at 5:30 AM on April 13
Chloride concentration: 6ppm

- Drain hole (northeast) of the underground reservoir No.4
Sampling performed at 5:40 AM on April 13
Chloride concentration: 10ppm

- Drain hole (southwest) of the underground reservoir No.4
Sampling performed at 5:40 AM on April 13
Chloride concentration: 9ppm

- Drain hole (northeast) of the underground reservoir No.5
Sampling performed at 5:50 AM on April 13
Chloride concentration: 15ppm

- Drain hole (southwest) of the underground reservoir No.5
Sampling performed at 5:50 AM on April 13
Chloride concentration: 8ppm

- Drain hole (northeast) of the underground reservoir No.6
Sampling performed at 6:00 AM on April 13
Chloride concentration: 13ppm

- Drain hole (southwest) of the underground reservoir No.6
Sampling performed at 6:00 AM on April 13
Chloride concentration: 10ppm

- Drain hole (northeast) of the underground reservoir No.7
Sampling performed at 6:10 AM on April 13
Chloride concentration: 7ppm

- Drain hole (southwest) of the underground reservoir No.7
Sampling performed at 6:10 AM on April 13
Chloride concentration: 11ppm

- Leakage detection hole (northeast) of the underground reservoir No.1
Sampling performed at 9:00 AM on April 13
Chloride concentration: 1200ppm

- Leakage detection hole (southwest) of the underground reservoir No.1
Sampling performed at 8:45 AM on April 13
Chloride concentration: 8ppm

- Leakage detection hole (northeast) of the underground reservoir No.2
Sampling performed at 9:20 AM on April 13
Chloride concentration: 120ppm

- Leakage detection hole (southwest) of the underground reservoir No.2
Sampling performed at 9:10 AM on April 13
Chloride concentration: 10ppm

- Leakage detection hole (northeast) of the underground reservoir No.3
Sampling performed at 9:45 AM on April 13
Chloride concentration: 10ppm

- Leakage detection hole (southwest) of the underground reservoir No.3
Sampling performed at 9:35 AM on April 13
Chloride concentration: 180ppm

- Leakage detection hole (northeast) of the underground reservoir No.4
Sampling performed at 10:00 AM on April 13
Chloride concentration: 11ppm

- Leakage detection hole (southwest) of the underground reservoir No.4
*Sampling was not performed since the amount of sample necessary for analysis could not be obtained.

- Leakage detection hole (northeast) of the underground reservoir No.6
Sampling performed at 10:20 AM on April 13
Chloride concentration: 9ppm

- Leakage detection hole (southwest) of the underground reservoir No.6
*Sampling was not performed since the amount of sample necessary for analysis could not be obtained.