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Press Release (Aug 31,2011)
Evaluation status of internal exposure dose of emergency workers
We have been evaluating exposure dose of workers at Fukushima Daiichi 
Nuclear Power Station in the following two categories:
 -Internal exposure dose
 -External exposure dose

We have sequentially submitted interim reports to Ministry of Health, 
Labor and Welfare on the following items when each reporting due date 
comes, and have made announcements.
(a) Evaluation results of internal exposure dose from March to May
   (9,899 persons out of 10,652 intended persons were evaluated. 
    Remaining 753 persons will be evaluated hereafter.)*1
(b) From (a), detailed evaluation*2 results of internal exposure dose 
   for workers with the aggregate evaluation of internal and external 
   exposure dose over 250mSv (6 persons)
(C) From (a), evaluation results of internal exposure dose for workers 
   with evaluation of internal exposure dose over 20mSv (349 persons, 
   including 6 persons in (b))
   (Previously announced on June 13, 20, 30, July 13, 20, 29 and August 10)

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We would like to announce that we have compiled the following two issues 
and reported to Ministry of Health, Labor and Welfare today.
(1) Evaluation status of internal exposure dose (Refer to Attachment 1 of 
    the Exhibit)
  - The number of workers who are not finished evaluation of internal 
    exposure dose from March to May became 288 persons from 753 persons as 
    of August 10. The evaluation results of workers who finished evaluation 
    this time are as follows.
       Over 20mSv     2 persons (maximum 22.0mSv for March)
  - The evaluation results of workers who finished evaluation for June are 
    as follows. Also there are 297 persons to be evaluated hereafter.
       Over 20mSv     0 person
(2) Regarding the investigation on the workers whose contact information is 
    not identified
  - We reported it as per Attachment 2 of the Exhibit.
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In addition, we are planning to report to Ministry of Health, Labor and 
Welfare as follows. 
- Evaluation results of internal exposure dose of the workers who are not 
  finished evaluation from March to June as of today and for July 
  (September 15)
- Progress status of the investigation for the workers whose contact 
  information are unknown (September 15)

                                                                       END

*1 The number of the evaluated from March to May as of August 10
 March: 3,715 persons out of 3,754 intended persons (39 persons are remaining.)
 April: 3,463 persons out of 3,689 intended persons (226 persons are remaining.)
 May: 2,721 persons out of 3,209 intended persons (488 persons are remaining.)

*2 Detailed evaluation of internal exposure dose
 Regarding the evaluation of internal exposure dose, firstly, a measurement
 of the amount of residual radioactive material by whole body counter (WBC)
 installed in Hirono football ground nearby J-VILLAGE will be conducted. 
 When the result of the measurement exceeds 20mSv, as detailed evaluation,
 re-evaluation specifying irradiated date based on interview, etc. or 
 detailed  measurement by using WBC of Japan Atomic Energy Agency (JAEA)
 intended for detailed examination will be conducted. The evaluation result 
 may be reviewed depend on the evaluation progress. 
<Exhibit>
Enhancing controls of internal exposures at Fukushima Daiichi Nuclear Power 
Station (PDF 27.1KB)
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