Unit 1 of the St. Lucie nuclear plant, operated by NextEra Energy (NYSE:NEE) utility Florida Power & Light (FPL) experienced an unplanned outage on Aug. 1 that was attributed to a “pressure boundary leakage,” according to a report filed with the Nuclear Regulatory Commission (NRC).
Meanwhile the Tennessee Valley Authority (TVA) Browns Ferry Unit 1 reactor in Alabama has returned to service, according to NRC data.
“On August 1, 2016 at 0342 EDT St. Lucie Unit 1 commenced a unit shutdown required by Technical Specifications due to Reactor Coolant System Pressure Boundary Leakage in excess of the allowable limit of zero leakage,” according to the report filed with NRC.
“The leak was initially identified on July 31, 2016 at 2115 EDT as not Pressure Boundary leakage. After further analysis, the leak was determined to be Reactor Coolant System Pressure Boundary leakage at 0123 on August 1, 2016. The leakage is estimated as less than one tenth of a gallon per minute and is not impacting the ability to shut down the unit. Additional impact of the leak is under evaluation,” the NRC report went on to say.
St. Lucie 1 was still listed at zero power early Aug. 2, according to NRC data.
The TVA Browns Ferry 1 unit in Alabama, which had gone offline about a week earlier, was listed at 59% early Aug. 2. Browns Ferry Unit 1 is a roughly 1,100 MW boiling water reactor (BWR)in Limestone County, Alabama. It is part of a three-reactor station operated by TVA.
St. Lucie Unit 1 is an almost 1,000 MW pressurized water reactor (PWR) located in St. Lucie County, Florida. It is part of a two-reactor station operated by FPL.