On March 21st, 2011, we conducted sampling surveys, as a part of
monitoring of surrounding environments, and detected radioactive materials
in the seawater around the water discharge canal (of the south side) of
Fukushima Daiichi Nuclear Power Station, which was damaged by the
Tohoku-Pacific Ocean Earthquake. Therefore, we informed Nuclear and
Industrial Safety Agency (NISA) and the government of Fukushima Prefecture
of the results.
Since March 22nd, we have conducted seawater sampling surveys at four
points off the shore of Fukushima Daiichi Nuclear Power Station (twice a
day at two points out of such four points since March 26th).
Since April 17, we have also conducted sampling surveys at four points,
3 km off the shore of Fukushima Daiichi Nuclear Power Station, two points,
8 km off the shore of the Power Station and 6 points, 15 km off the shore
of the Power Station and informed them of evaluation results.
The data of three detected nuclides (Iodine-131, Cesium-134 and Cesium-137)
will be reported as fixed data. Other nuclide figures are to be
re-evaluated based on the improved measures for recurrence prevention
which have been prepared in accordance to a warning from NISA on April 1st.
(Previously announced)
On April 26th, 2011, we conducted sampling surveys to evaluate the spread
of radioactive materials to the ocean which were detected at Fukushima
Daiichi Nuclear Power Station. Since the radioactive materials were
detected as shown in the exhibit, we informed NISA and the government of
Fukushima Prefecture of the results.
In addition to 12 sampling points off shore, we have planned to conduct
sampling surveys for 2 additional points at 3km off shore, which makes the
total sampling points to 14 since April 26th. However, we conducted
surveys at only 7 points due to the adverse weather.
We will continuously conduct the same sampling surveys.
attachment1:Results of Nuclide Analysis of Seawater(PDF 49.1KB)
attachment2:Radioactivity Density of Seawater(PDF 34.7KB)
attachment3:Radioactivity Density of Seawater (coast)(PDF 43.4KB)
attachment4:Radioactivity Density of Seawater (off the coast)(PDF 43.2KB)
