Tokyo Electric Power Co. said Friday two employees who were working at the crippled Fukushima No. 1 nuclear plant exceeded for the first time the 250-millisievert radiation exposure limit set for the crisis.
The two, who had absorbed high levels of radioactive iodine-131, received a detailed assessment by the National Institute of Radiological Sciences, which said the internal exposure of one worker in his 30s is estimated at 210 to 580 millisieverts and that of the other worker in his 40s is 200 to 570 millisieverts.
Their external radiation exposure is 73 and 88 millisieverts, respectively, meaning the total amount exceeds the 250-millisievert limit.
Continue reading at Tepco pair’s exposure topped 250 millisievert limit