On March 22, 2011, as a part of monitoring activity of the surrounding 
environments, we conducted nuclide analyses of radioactive materials 
contained in the air which was collected at the site of Fukushima Daiichi 
Nuclear Power Station, which was damaged by the Tohoku- Chihou-
Taiheiyou-Oki Earthquake. As a result, radioactive materials were detected 
and therefore, we summarized the results and reported them to Nuclear and 
Industry Safety Agency (NISA) as well as to the government of Fukushima 
Prefecture.

The analyses results of the three nuclides (Iodine-131, Cesium-134 and 
Cesium-137) are to be released as fixed figures and the other nuclide 
figures are to be revaluated.
                                                    (Previously announced)

On September 2, 2011, we conducted a nuclide analysis of radioactive 
materials contained in the air which was collected at the site of 
Fukushima Daiichi and Daini Nuclear Power Stations. As a result, no 
radioactive materials were detected as described in the appendix. 

We suspended the samplings which were planned yesterday at North Side 
Slope of Unit 1, West Side Slope of Unit 1 and 2, West Side Slope of Unit 
3 and 4, Upper of South Breakwater, and Upper of Megafloat of Fukushima 
Daiichi, due to the weather condition.

Also, we conducted an analysis about plutonium and strontium in the air 
which was collected on August 15, but no plutonium and strontium has been 
detected as described in the appendix.

We reported the above results to NISA as well as to the government of 
Fukushima Prefecture today. 

We will continuously conduct the same sampling surveys. 

Appendix: Nuclide Analysis Results of Radioactive Materials in the Air at 
          the Sites of Fukushima Nuclear Power Stations (PDF 14.1KB) Appendix1: Fukushima Daiichi Nuclear Power Station  Analysis Result of 
           Plutonium in the Air(PDF 7.84KB) 
Appendix2: Fukushima Daiichi Nuclear Power Station  Analysis Result of 
           Strontium in the Air(PDF 7.48KB) 
Appendix3: Fukushima Daiichi Nuclear Power Station Results of Dust Nuclide 
           Analysis (PDF 10.7KB) Appendix4: Fukushima Daini Nuclear Power Station Results of Dust Nuclide 
           Analysis (PDF 10.3KB)