Regarding the fact that the data of the earthquake on the 13th of this month could not be recorded because the seismograph of TEPCO Fukushima Daiichi Nuclear Power Station Unit 3 was out of order, Chairman Sarada of the Nuclear Regulation Authority said, "The installed seismograph What did you do with the maintenance of the earthquake? ”And expressed the idea of verifying TEPCO's response.
TEPCO installed two seismographs in March last year in order to evaluate the impact of aftershocks on the building at Fukushima Daiichi Nuclear Power Station Unit 3, whose building was severely damaged in an accident 10 years ago. All of them broke down due to the heavy rain in July last year and were not repaired.
For this reason, Unit 3 was unable to collect data for the earthquake on the 13th of this month.
Toyoshi Fuketa, Chairman of the Nuclear Regulation Authority, said at a press conference on the 24th, "What was the maintenance of the installed seismographs? Also, I would like to investigate the status of equipment that measures tsunamis in addition to the seismographs." , Showed the idea of confirming other measuring instruments and verifying the response of TEPCO's seismographs.
On the other hand, at Fukushima Daiichi Nuclear Power Station Units 1 and 3, water is injected into the containment vessel containing the melted down nuclear fuel to cool it, but the water level tends to drop after this earthquake, and it seems that it is still continuing. I am.
Regarding this, Chairman Fuketa said that there is no impact on the external environment at present, and said, "The cause has not been identified and it is occurring in the important equipment of the containment vessel, so I would like to pay close attention to it." , Showed the idea of continuing monitoring.