Entergy's 903-MW Arkansas Nuclear One-1 in London, Arkansas, synchronized with the electric grid at about 9 am CST (1500 GMT) Friday following a manual shutdown by operators Tuesday, plant spokeswoman Sarah Millard said Friday.
The shutdown Tuesday came after workers noticed feedwater oscillations during a planned down-power.
Millard said in an interview she could not provide the unit's current capacity. It was operating at 1% of capacity early Friday, according to the US Nuclear Regulatory Commission's daily reactor status report.
She declined to comment on when the reactor will return to 100% of capacity, saying this "is business confidential information."
