On June 10, 2011, we received an instruction document titled "Cause 
analysis on exposure of radiation workers exceeding dose limit and 
development of measures on recurrence prevention at emergency work in 
Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Company 
(instruction)"* from Nuclear and Industrial Safety Agency (NISA) of 
Ministry of Economy, Trade and Industry.
                                         (Previously announced on June 10)

Following the instructions, we developed the measures on the cause 
analysis on exposure of radiation workers exceeding dose limit and 
development of measures on recurrence prevention at emergency work in 
Fukushima Daiichi Nuclear Power Station, and reported it to NISA today.


Attachment: The report on cause analysis on exposure of radiation workers 
            exceeding dose limit and development of measures on 
            recurrence prevention at emergency work in Fukushima Daiichi 
            Nuclear Power Station (PDF 76.9KB)  
 
* Cause analysis on exposure of radiation workers exceeding dose limit
  and development of measures on recurrence prevention at emergency work 
  in Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power 
  Company (instruction)
                                                  NISA No.1, June 10, 2011 

On June 10, 2011, Nuclear and Industrial Safety Agency (hereinafter called 
"NISA") received a report from your good self that, since the 2011 Tohoku-
Chihou-Taiheiyo-Oki Earthquake occurred, two employees engaged in radiation 
work at Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power 
Company had received effective dose exceeding 250 mSv of limit stipulated 
in Notice on Dose Limit based on Provision of Order of Installation and 
Operation of Commercial Nuclear Reactor for Power Generation in Case of 
Especially Imperative Emergency in the 2011 Tohoku-Chihou-Taiheiyo-Oki 
Earthquake (Notice of Ministry of Economy, Trade and Industry No. 40, Year 
2011) based on Section 2 of Article 9 of Order of Installation and Operation 
of Commercial Nuclear Reactor for Power Generation (Ordinance of Ministry of 
International Trade and Industry No 77, Year 1978). Hence, NISA has issued a 
strong warning to your good self and instructed you to conduct cause 
analysis on exposure of radiation workers exceeding dose limit in the Power 
Station, to develop measures on recurrence prevention and to report to NISA 
by June 17, 2011.