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 August 24, 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.
Also, we conducted an analysis about plutonium in the air which was
collected on August 8, but no plutonium 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.
Appendix1: Nuclide Analysis Results of Radioactive Materials in the Air at
the Sites of Fukushima Nuclear Power Stations (PDF 13.8KB)
Appendix2: Fukushima Daiichi Nuclear Power Station Analysis Result of
Plutonium in the Air (PDF 7.72KB)
Appendix3: West Gate of Fukushima Daiichi Nuclear Power Station Results of
Dust Nuclide Analysis (PDF 12.9KB)
Appendix4: Fukushima Daini MP-1 Results of Dust Nuclide Analysis
(PDF 12.7KB)