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Press Release (Mar 25,2011)
Result of the investigation on exposure to radiation of workers from cooperative companies at Unit3 in Fukushima Daiichi Nuclear Power Station(March 25, 2011)
This nuclear power station has been shut down because of Tohoku-Chiho 
Taiheiyou-Oki Earthquake.
On March 24, 2011, it was confirmed that 3 workers from cooperative 
companies who were in charge of cable laying work in the 1st floor and 
the underground floor of turbine building were exposed to the radiation 
dose of more than 170mSv.2 of them were confirmed that their leg skins 
were contaminated. Although they were decontaminated by laundering, they 
were transferred to Fukushima Medical University hospital because there 
is possibility that they get a burn injury by beta ray. After medical 
examination at Fukushima Medical University Hospital, they were 
transferred to National Institute of Radiological Sciences in Chiba 
Prefecture on March 25 and stay for around four days to survey the 
situation. Investigation result of the water that the workers stepped 
in would be announced when it is reported. (previously announced)

We announce the investigation result of their working surroundings as 
mentioned bellow.

Radiation dose rate of surface of the water is approximately 400mSv/h.

Result of gamma-ray nuclide analyses based on sampling of puddle 
We are assessing radiation dose of 2 worker's leg skin by beta ray. We guess that this incident was caused because the workers regarded radiation dose of working area as low from survey result of radiation dose on March 23 and continued working without recognizing change of working conditions of the day although alarm of their dosemeter rang. We thoroughly instruct our employees and workers of cooperative companies to recognize alarm of their dosemeter and evacuate when the alarm rings.
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