On September 15, 2011, we received an instruction document titled
"Regarding the Investigation of the Mistakes in the Reports of Emergency
Countermeasures for Safety (Instruction)*1" from the Nuclear and Industrial
Safety Agency (NISA) of the Ministry of Economy, Trade and Industry.
In accordance with this instruction, we investigated the mistakes and found
two mistakes concerning the installation level of the main equipment in the
report of the emergency countermeasures for safety at Fukushima Daini
Nuclear Power Station.
We have already informed the result to NISA on September 28th.
On October 26, 2011, we received an instruction document titled "Regarding
the reinvestigation of the Mistakes in the Reports of Emergency
Countermeasures for Safety (Instruction)*1" from NISA.
(Previously announced on September 15 and 28 and October 26)
In accordance with this instruction, we investigated the mistakes in the
following reports that have already been submitted to NISA and we found
mistakes concerning the power load and so on in the report of the emergency
countermeasures for safety at Fukushima Daini Nuclear Power Station and the
report of a severe accident. Therefore we reported the reinvestigation
results, causes, and prevention measures to NISA, and submitted an amended
report of emergency countermeasures for safety at Fukushima Daini Nuclear
Power Station and an amended report of the severe accident to NISA.
The mistakes have no impact on the evaluation results.
· Regarding Emergency Countermeasures for Safety at Kashiwazaki Kariwa
Nuclear Power Station (Implementation status report)
(Reported on April 21, 2011. Amendment reported on May 2, 2011.)
· Regarding Offsite Power Supply Security at Nuclear Power Stations and
Reprocessing Plants
(Reported on May 16, 2011.)
· Regarding Emergency Countermeasures for Safety at Fukushima Daini Nuclear
Power Station (Implementation status report)
(Reported on May 20, 2011. Amendment reported on July 21 and September 28.)
· Regarding Implementation of Countermeasures against Severe Accidents
based on the Accident at Fukushima Daiichi Nuclear Power Station
(Implementation status report)
(Reported on June 14, 2011)
· Regarding the Security of the Offsite Power Supply of Fukushima Daini
Nuclear Power Station
(Reported on July 7, 2011)
· Regarding the Anti-earthquake Countermeasures of the Switchyard etc.
with a View to Securing Reliability of the Offsite Power Supply for
Nuclear Power Stations (Report)
(Reported on July 7, 2011)
End
○Attachment
(Summary) Reinvestigation Results, causes and prevention measures regarding
mistakes in the reports of the emergency countermeasures for safety
(PDF 35.4KB)
○Reference*2
(Amendment) Regarding Emergency Countermeasures for Safety at Fukushima
Daini Nuclear Power Station (Implementation status report)
(Revised edition) Regarding Implementation of Countermeasures against
Severe Accidents based on the Accident at Fukushima Daiichi Nuclear Power
Station (Implementation status report)
*1 Instruction document
Investigation of the mistakes in the reports of the emergency
countermeasures for safety (instruction)
(September 14, 2011, No.5)
Reinvestigation of the mistakes in the reports of the emergency
countermeasures for safety (instruction)
(October 25, 2011, No.2)
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We have provided a Japanese press release version of the instruction
document received from NISA. However, at this time we have reserved the
right not to 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.
*2 The references are only available in Japanese.We apologize for any
inconvenience this may cause.
