TEPCO releases worker radiation exposure data to WHO

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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 Group TEPCO Employees Contract Workers Total
80 0 1 1
70 (70-79) 1 24 25
60 (60-69) 27 1831 1858
50 (50-59) 693 4716 5409
40 (40-49) 1173 4720 5893
30 (30-39) 925 3254 4179
20 (20-29) 511 1543 2057
Teens (18-190 3 61 64
No Record 6 611 617
Total 3339 16764 20103

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

Age Group TEPCO Employee Contract Worker
Teens 56.89 44.34
20s 477.01 230.90
30s 678.80 238.42
40s 645.54 139.60
50s 352.08 137.00
60s 124.63 169.60
70s 0.11 59.67

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

Classification in mSv Number of Workers
Exceeds 10,000 2
Range – 2,000 – 10,000 10
Range – 1,000 – 2,000 32
Range – 500 – 1,000 50
Range – 200 – 500 69
Range – 100 – 200 15
Under 100 344

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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