Fig. 4.

Radiation exposure doses of workers at Fukushima incident. Aotal of 31 383 workers were engaged in emergency work after the Fukushima incident. During the first month after Fukushima incidence, 173 workers exceeded 100 mSv of combined cumulative effective dose of internal and external radiation exposure (highest was 670.36 mSv). Thereafter, workers who were exposed to >100 mSv were not reported. The average effective dose was 12.5 mSv amongst emergency workers from March 2011 to September 2013 at Fukushima incident.