On March 28th 2011, we were advised from Nuclear Safety Commission of
Japan to enhance the sampling survey regarding water in underground
floor of the turbine building of Fukushima Daiichi Nuclear Power Station.
In order to verify any leakages to underground and sea, and safety, we
have been implementing the sampling survey of subsurface water and
Regarding sampling survey of sub-drain, based on the instruction from
NISA on April 14th, we continue to conduct same kind of sampling survey
three times a week, and inform the result on the next day of the survey.
On April 22nd 2011, we had conducted sampling survey regarding sub-drain
(subsurface water obtained and managed in the site) near the turbine
building of Fukushima Daiichi Nuclear Power Station. Today, we had
informed the result to Nuclear and Industrial Safety Agency (NISA) and
the government of Fukushima Prefecture, because radioactive materials
were detected as shown in the attachment.
attachment1:Results of Nuclide Analysis of Sub-drain(PDF 52.3KB)
attachment2:Radioactivity Density of Seawater(PDF 42.8KB)