February 23, Tokyo Electric Power Company revealed on the 22nd that two seismographs set up at Unit 3 reactor plant of Fukushima Daiichi Nuclear Power Plant failed last year, but failed to take quick repairs and other countermeasures and were put on hold, resulting in the failure to record the seismic shaking data that occurred on the 13th of this month. .
According to the report, it has been more than a week since Fukushima and Miyagi prefectures observed the earthquake of the top six (Japanese standard), but Tōdian did not explain the fact of the failure at all at press conferences and other occasions.
It is reported that in March last year, the Regulatory Commission pointed out that in Units 1 to 4 where core melting and hydrogen explosion occurred, it was important to confirm the impact of the earthquake on the aging unit 3 and 4 plant.
TEP Power said that it would install additional seismographs on the 5th and 6th units used at that time, and set up seismographs on the 5th and 1st floors of Unit 3 reactor plant that month.
According to TEM, a seismograph on the first floor was flooded by a torrential rain last July; in October, a seismograph on the fifth floor failed to make noise in the measurement data.
The person in charge of TET China Eastern Power explained at a press conference on the 22nd of this month that he explained the reason for the delay in repair: “It took a long time to analyze the reasons for the noise.” For reasons not explained to the public, the person said, “because it is positioned as an experimental setting”.