When workers of TEPCO's partner company were doing welding operation of plumbing for fire extinguish equipment near No. 3 light oil tank (outdoor type) of Fukushima Daiichi Nuclear Power Station Unit 5 and 6, lawn of 3m X 3m was burned due to fire spark by the welding operation.

We used non-burnable sheets to cover the lawn for fire protection, however, it was blown about by the wind and the fire broke out by the spark.

At 11:25 am, we confirmed that the worker had extinguished the fire by the water.

At 0:13 pm, we reported to the fire department and they will conduct the site survey.

No one was injured by this accident and this gives no impact on monitoring values of surrounding area and cooling system of nuclear reactor & spent fuel pool.