Fukushima Daiichi NPS Prompt Report 2013

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.

During a patrol today (on September 2), we found one location showing a high dose equivalent rate, other than the locations included in the previous announcements.

· Tank No.7 in Group A in the H6 area: At least 100mSv/h (at the 5-cm distance)^*
* Measured with a low-range measuring device (capable of measuring up to 100mSv/h)

This location is on the flange connection part of the bottom plate, and we found no trace of leakage of contaminated water, etc. We will continue investigation using a high-range measuring device also.

Further, as a result of the measurements conducted today at the 3 locations within the H3 area that showed high dose equivalent rates, a dose rate of 10mSv/h or higher (at the 50-cm distance) was detected at one location (the north side of Tank No.4 in Group B in the H3 area).