Read moreSequoyah struggles with flood preparedness, notifies NRC
Flood seals protecting the Sequoyah Nuclear Plant near Soddy-Daisy were found to be degraded last week, just before TVA met for a second time with nuclear regulators about plans to add new protections against a potential giant flood.
Tennessee Valley Authority officials on Wednesday filed an “event” notice with the Nuclear Regulatory Commission.
The utility said testing had shown that both reactors at Sequoyah were “at risk of flooding” because conduit junctions were not water-tight.
Sump pumps in the emergency raw cooling water station building would not be able to keep up with a flood, according to the event notice and spokesman Ray Golden.