Regarding the event which leakage of water containing radioactive
materials at the water desalination apparatus (evaporative concentration
apparatus) of Fukushima Daiichi Nuclear Power Station on December 4, we
have received the directive document*1 from NISA of Ministry of Economy,
Trade and Industry "Regarding Response to Leakage of Water Containing
Radioactive Materials from Evaporation Concentration Device at Fukushima
Daiichi Nuclear Power Station (Direction)".
We have reported to NISA regarding the result (provisional) of the
evaluation on the outflow of water containing radioactive materials into
the sea which was leaked from the water desalination apparatus
(evaporative concentration apparatus) on December 6. We also reported to
NISA regarding the cause of the leakage, measures for the recurrence
prevention and investigation of the soundness of other facilities on
December 8.
Thereafter, we received the additional directive document*2 from NISA
"Regarding Response to Report on Leakage of Water Containing Radioactive
Materials from Evaporation Concentration Device at Fukushima Daiichi
Nuclear Power Station (Direction)" on December 12.
(Previously announced on December 5, 6, 8 and 12)
We received the document*3, "Enforcement of the Measures for the Leaking
Water including the Radioactive Material from the Evaporation
Concentration Device in Fukushima Daiichi Nuclear Power Station (Stern
Warning)" from NISA on December 13.
(Previously announced on December 13)
As per Directions received and others, we have implemented measures for
the leaking water, reinforced the monitoring of the leaking, and
re-evaluated the influence to the ocean. Today we reported to NISA
regarding the situation up to now.
As for the environmental assessment of the ocean, since the ascertainment
of the condition for radioactive material's diffusion is not enough, we
only reported the result of monitoring implemented up to date. We will
submit the final report to NISA by the end of March, 2012 reflecting the
additional analysis results.
End
Attachment 1 *The attachment is only available in Japanese.
"Regarding Response to Leakage of Water Containing
Radioactive Materials from Evaporation Concentration Device
at Fukushima Daiichi Nuclear Power Station".
Attachment 2 *The attachment is only available in Japanese.
"Implementation Report on the Enforcement of the Measures for
the Leaking Water including the Radioactive Material from the
Evaporation Concentration Device in Fukushima Daiichi Nuclear
Power Station."
*1 Directive document
"Regarding Response to Leakage of Water Containing Radioactive
Materials from Evaporation Concentration Device at Fukushima Daiichi
Nuclear Power Station (Direction)"
(05.12.2011 NA No. 1)
*2 Directive document
"Regarding Response to Report on Leakage of Water Containing
Radioactive Materials from Evaporation Concentration Device at
Fukushima Daiichi Nuclear Power Station (Direction)"
(12.12.2011 NA No. 1)
*3 Stern Warning
"Enforcement of the Measures for the Leaking Water including the
Radioactive Material from the Evaporation Concentration Device in
Fukushima Daiichi Nuclear Power Station (Stern Warning)"
(13.12.2011 NA No.3)
We have provided a Japanese press release version of the instruction
document received from NISA in our Japanese website. However, at this time
we reserve the right to not provide an English version due to potential
misunderstandings that may arise from an inaccurate rendering of the
original Japanese text. We may provide the English translation that NISA
releases in our press releases. However, in principle we would advise you
to visit the NISA website for timely and accurate information.
