TEPCO corrected the arrival time of the tsunami as “10 seconds earlier” Fukushima Daiichi Nuclear Power Plant August 20, 18:37

TEPCO announced that the position of the ocean wave altimeter used to estimate the arrival time of the tsunami was different from the original report in the accident at the Fukushima Daiichi NPS eight years ago. As a result, the estimated time of arrival of the tsunami was corrected to be about 10 seconds earlier than before, but TEPCO does not affect the results of the accident investigation report of the Diet.

TEPCO analyzed the estimation of the arrival time of the tsunami that hit the Fukushima Daiichi nuclear power plant using a wave height meter that was 1.5 km offshore, and the time when the highest tsunami hit was 3:36 pm 10 Reported around seconds.

An outside expert pointed out the position of the altimeter, and TEPCO reviewed it, and corrected that the altimeter was actually located 1.3 kilometers near the land 200 meters. The reason is that he was unable to enter the main office building of the nuclear power plant where the location information was available, and instead referred to the relevant materials at the head office.

TEPCO re-calculated the estimated arrival time at the correct wave height meter, and corrected it to be about 10 seconds earlier than before. The data from the wave height meter is also reported to the Diet and the government, and is used to analyze the cause in the accident investigation report, but when TEPCO evaluated it, the results of the accident investigation report of the Diet and the government There is no impact.

TEPCO thanked Mr. Chen, “I am very sorry that I did not notice the error in the basic data, even though I was in a mess. I would like to explain to the experts involved in the accident investigation.”