TEPCO releases worker radiation exposure data to WHO

TEPCO released data related to the radiation exposure doses documented for Fukushima Daiichi emergency workers which it had submitted to the World Health Organization (WHO).

The data showed the youngest workers were in their teens, while the oldest was 84 years old.  One of the teenagers was exposed to 56.89 mSv.  Most of the workers are in their 40s.  26 workers are over the age of 70.

TEPCO Worker Ages

Age GroupTEPCO EmployeesContract WorkersTotal
80011
70 (70-79)12425
60 (60-69)2718311858
50 (50-59)69347165409
40 (40-49)117347205893
30 (30-39)92532544179
20 (20-29)51115432057
Teens (18-19036164
No Record6611617
Total33391676420103

The highest radiation dose recorded was 678.8 mSv.  The highest dose recorded by a worker in their 20s was 477.01 mSv.

Age GroupTEPCO EmployeeContract Worker
Teens56.8944.34
20s477.01230.90
30s678.80238.42
40s645.54139.60
50s352.08137.00
60s124.63169.60
70s0.1159.67

Distribution of Thyroid Doses based on measured value of I-131 (Thyroid equivalent dose from Cs not included in data)

Classification in mSvNumber of Workers
Exceeds 10,0002
Range – 2,000 – 10,00010
Range – 1,000 – 2,00032
Range – 500 – 1,00050
Range – 200 – 50069
Range – 100 – 20015
Under 100344

There are still over 600 workers unaccounted for in the most recent data, TEPCO did not release any details as to why they were unable to track down the missing workers.

Source: TEPCO

Source: JiJi Press

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