We, Tokyo Electric Power Company, received an instruction notice* 
"regarding the additional opinion of NISA for the analysis of reporting the 
results of evaluation of earthquake-proof safety of existing reactor 
facilities for power generation, referring to the new earthquake-proof 
standards established based on the Tohoku-Chihou- Taiheiyo-Oki Earthquake, 
2011 (Instruction)"(April 28th,, 2011)

We will make evaluations of our facilities based on this instruction and 
report to NISA. 

* Instruction Notice
  Regarding the additional opinion of NISA for the analysis of reporting 
  the results of evaluation of earthquake-proof safety of existing reactor 
  facilities for power generation, referring to the new earthquake-proof 
  standards established based on the Tohoku-Chihou-Taiheiyo-Oki Earthquake, 
  2011 (Instruction)

                                               NISA No.4, April 28th, 2011
                                                          April 28th, 2011

Today, Nuclear Safety Commission decided on the additional opinion of NISA 
for the analysis of reporting the results of evaluation of earthquake-proof 
safety of existing reactor facilities for power generation, referring to 
the new earthquake-proof standards established based on the 
Tohoku-Chihou-Taiheiyo-Oki Earthquake, 2011 and notified to Nuclear and 
Industrial Safety Agency (hereinafter referred to as "NISA").

According to the decision, Nuclear Safety Commission defined the following 
opinion and request analysis by NISA regarding the evaluation of 
earthquake-proof safety of the existing reactor facilities for power 
generation referring to the new earthquake-proof standards (hereinafter 
referred to as "earthquake-proof back-check"), in the understanding that 
more places are becoming seismically active triggered by the current 
earthquake and normal-fault-type earthquakes are occurring as observed in 
Hamadori in Fukushima Prefecture on April 11th.

 ·Accompanying the Tohoku-Chihou-Taiheiyo-Oki Earthquake, major crustal 
  movements were observed with a big impact in a wide area. In response to 
  this situation, it is necessary to analyze the possibilities that the 
  faults, displacements, and lineaments, which are already investigated by 
  the reactor owners, fall into the active faults that require 
  earthquake-proof measures.

 ·Earthquakes should be evaluated in case that earthquakes have been 
  observed in the area which previously was seismically inactive 
  accompanying the Tohoku-Chihou-Taiheiyo-Oki Earthquake or nearby faults 
  which do not fall into the faults which require earthquake-proof measures.

 ·Based on the above analysis, if there are any faults which may influence 
  the site, the ground motion should be evaluated .

In response to the opinion, NISA request Tokyo Electric Power Company to 
report on the following matter by May 31st, 2011. 

Information regarding the results of geological surveys or faults, 
displacements, and lineaments, etc., which are necessary to analyze the 
possibilities of existence of the faults which require earthquake-proof 
measures, considering that major crustal movements were observed 
accompanying the Tohoku-Chihou-Taiheiyo-Oki Earthquake,