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Entergy's Arkansas Nuclear One-2 returns to grid after repairs

Entergy's 1,065-MW Arkansas Nuclear One-2 nuclear reactor in Russellville, Arkansas, synchronized with the electricity grid 3:55 pm CDT (2055 GMT) Thursday, ending a one-month maintenance outage, plant spokeswoman Jennifer White said in an interview Friday.

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The unit was operating at 26% of capacity early Friday and was shut early Thursday, according to the US Nuclear Regulatory Commission's daily reactor status reports. White declined to estimate when ANO-2 will return to 100% of capacity, saying it was "business sensitive information."

Operators shut the unit September 28 to repair an emergency diesel generator, she said.

An event report filed with NRC said that on September 16 the emergency diesel generator's inboard generator bearing failed. The unit was required to have the generator returned to service within 14 days or shut the reactor, and the report said repairs could not be completed in this timeframe "due to unforeseen circumstances which evolved during recovery efforts."

Article Continues below...

The 903-MW Arkansas Nuclear One-1 reactor remains shut for refueling and maintenance which began September 24.

--Jim Ostroff, james.ostroff@spglobal.com
--Edited by Keiron Greenhalgh, keiron.greenhalgh@spglobal.com