On March 28 2011, we were advised from Nuclear Safety Commission of Japan
to enhance sampling surveys regarding water accumulated in underground
floor of the turbine buildings of Fukushima Daiichi Nuclear Power Station.
In order to verify any leakages to underground and sea, and safety, we
have been implementing the sampling surveys of subsurface water and
seawater.

Regarding sampling of sub-drains, per the instruction from Nuclear and
Industry Safety Agency (NISA) on April 14, we will continue the same kind
of sampling surveys three times a week, and inform the result on the next
day of the survey.
                                                    (Previously announced)

We conducted analysis for plutonium and strontium on samples collected
from sub-drains (subsurface water obtained and managed in the site) near
the turbine buildings of Fukushima Daiichi Nuclear Power Station collected
on October 10. As a result, strontium 89 and 90 were detected as shown in
the appendix. 

Today, we reported the results to NISA and the government of Fukushima
Prefecture.

* Analysis results for 3 major nuclides (iodine131, Cesium 134 and 137)
  are already being reported on October 11. 

Attachment 1: Pu analysis result at sub-drains of Fukushima Daiichi Nuclear 
                                                   Power Plant (PDF 7.46KB) 
Attachment 2: Result of nuclide analysis of sub drain etc.(PDF 10.6KB)