September 22, 2012
Tokyo Electric Power Company
On September 22, during a rubble removal work of Unit 3 Fukushima Daiichi NPP, a worker tried to grab a steel beam (approx. 300mmX200mmX7m, approx. 470kg), which had been on the side of the spent fuel pool (SFP), using an oil-pressure fork attached to a head of a crane, and the steel beam slipped and fell into the SFP at approx. 11:07 am.
At approx. 11:45 am, we confirmed that there was no significant change to the operation status of the cooling system for the spent fuel pool and the water level of the skimmer surge tank.
Now, we are conducting a sampling of the spent fuel pool water.
There has been no significant change to the measured figures at the monitoring posts in the power plant and the radiation level near the spent fuel pool.
There were no injuries by this incident.