On April 12th 2011, in order to examine the condition of the spent fuel 
pool of Unit 4 of Fukushima Daiichi Nuclear Power Station, we collected 
200ml of the water in the pool with the concrete pumping vehicle.
On April 13th 2011, we conducted a nuclide analysis of radioactive 
materials with the water and as a result have detected some radioactive 
materials as shown in the exhibit.

We are planning to evaluate the result in further detail. 

Exhibit:The result of the analysis of the water in the spent fuel pool 
        of Unit 4 of Fukushima Daiichi Nuclear Power Station(PDF 8.85KB)