Press Releases 2014

We have been evaluating the exposure dose of the workers at Fukushima Daiichi Nuclear Power Station in two categories, internal and external exposure doses.
The evaluation results have been submitted to the Ministry of Health, Labour and Welfare in the order of the due dates of announcements.

(Previously announced)

Today, we have submitted a report on the exposure dose evaluation as of the end of June 2014 to the Ministry of Health, Labour and Welfare.

-The number of workers newly engaged in June was 866 persons. The maximum external exposure dose to those workers engaged in the operation in June was 14.99 mSv, and no significant value was measured for the internal exposure.

-The exposure dose status of the "workers exposed to especially high radiation dose*" is provided separately.

The exposure dose evaluation result as of the end of July will be reported to the Ministry of Health, Labour and Welfare by the end of August 2014.

* Regarding the workers that have the Emergency dose limit (100 mSv), shown in "Ordinance on Prevention of Ionizing Radiation Hazards, chapter 7", applied; it specifically refers to the workers engaged in the work to maintain the function of the cooling reactor facility or spent fuel tank at an the area where the radiation dose exceeds 0.1 mSv/h as well as the reactor facility, steam turbine and related facilities and surrounding area in the power plant or the work to maintain the function to control or prevent the release of huge amounts of radioactive material due to malfunction or breakage of reactor facility.

<Appendix>
 Exposure Dose Distribution(PDF 81.6KB)
 Dose Distribution Table by Age(PDF 46.5KB)
 Dose Distribution Table by Month(PDF 87.0KB)
 Cumulative Dose Distribution Table by Year(PDF 82.0KB)
 External Dose Distribution Table by Month(PDF 85.9KB)
 Internal Dose Distribution Table by Month(PDF 88.6KB)
 Cumulative Dose Distribution Table up to each Month(PDF 109KB)