Feb 28, 2018
The devastated Fukushima No. 1 nuclear power plant is seen in this April 2011 file photo
An employee with a subsidiary of Tokyo Electric Power Company Holdings Inc. testified in court Wednesday that the unit reported a need to install tide barriers to prevent flooding from a tsunami well before the March 2011 nuclear accident at Tepco’s Fukushima No. 1 nuclear plant.
According to the worker, the Tepco unit produced an estimate in March 2008 on the basis of long-term assessments released by a government organization, saying that a tsunami could occur with a height of 15.7 meters, which is above ground level at the nuclear plant site.
The estimate was presented at a meeting in June the same year that was attended by Sakae Muto, a former Tepco vice president.
The worker testified during a hearing at the Tokyo District Court that the Tepco unit…
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20 millisieverts per year 