Press Release (Oct 31,2014) Exposure dose of Evaluation of the Workers at Fukushima Daiichi Nuclear Power Station

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 September 2014 to the Ministry of Health, Labour and Welfare.

-The number of workers newly engaged in September was 714 persons. The maximum external exposure dose to those workers engaged in the operation in September was 16.37 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 October will be reported to the Ministry of Health, Labour and Welfare by the end of November 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 24.0KB)
･Dose Distribution Table by Age(PDF 13.3KB)
･Dose Distribution Table by Month(PDF 34.8KB)
･Cumulative Dose Distribution Table by Fiscal Year (External Dose Distribution Table by Fiscal Year / External Dose Distribution Table by Fiscal Year)(PDF 38.1KB)
･External Dose Distribution Table by Month(PDF 37.0KB)
･Internal Dose Distribution Table by Month(PDF 36.9KB)
･Cumulative Dose Distribution Table up to each Month(PDF 58.3KB)

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