The operator of the damaged Fukushima nuclear power plant said on Monday that two seismometers in one of its three melting reactors had failed since last year and that no data was collected when a strong earthquake occurred in the area earlier this month.
The confirmation raises new questions as to whether the company’s risk management has improved since the 2011 earthquake and tsunami destroyed most of the plant’s facilities.
On Monday, the Nuclear Regulatory Authority met to discuss new damage caused by the magnitude 7.3 earthquake that struck the area on February 13th. The seismograph failed. Damage to its main enclosed room.
The operator Tokyo Electric Power Co. has repeatedly been criticized for covering up the factory and delaying disclosure.
Regulatory officials asked TEPCO at the meeting why it did not have seismic data from the Unit 3 reactor of Wednesday’s earthquake, and utility officials admitted that two of its seismographs had malfunctioned-one in July and the other in October-and It has never been repaired.
TEPCO also stated that, except for the two reactor buildings that survived the 201
At a meeting on Monday, regulatory officials said they were concerned about the drop in water levels and pressure in the main safety rooms 1 and 3, as the earthquake may have expanded existing damage or opened new leak paths, and urged utilities to keep close. Check whether the radiation level in the groundwater around the reactor building has increased.
Tokyo Electric Power Company said that so far, no abnormalities have been found in water samples.
The new damage may complicate the already difficult decommissioning process of the plant and increase the large amount of sewage stored in the plant.
Since the 2011 disaster, cooling water has been continuously escaping from the damaged primary containment and entering the basements of the reactor and turbine buildings. The volume of these basements has increased with the infiltration of groundwater. The water is pumped out and treated, part of it is reused as cooling water, and the rest is stored in about 1,000 water tanks.
TEPCO initially reported that the plant has not been abnormal since the earthquake on Saturday. But on Monday, the company said that due to the earthquake, about 20 of the fuel tanks slipped slightly, a storage container containing radioactive waste had been tilted, and the asphalt pavement of the plant had cracked.