Byron nuclear power plant returns to service following loss of offsite power

By Dorothy Davis 

Exelon's Byron nuclear power plant in Ogle County, Ill. Exelon (NYSE: EXC) announced that the Unit 2 reactor at its Byron nuclear power plant has been reconnected to the electrical grid and is generating power.

Operators at the plant declared an Unusual Event on Jan. 30, following the loss of offsite power due to an insulator failure at the facility’s switchyard. 

In response to the automatic shutdown diesel generators activated as designed to provide power to the reactor as technical experts completed hundreds of maintenance and inspection tasks while the unit was offline. 

Plant officials report the insulator has been repaired and a comprehensive investigation into the failure continues.

“Our highly trained engineers and operators performed exceptionally well in taking the proper safe steps to analyze data and make repairs, and then thoroughly checked and tested systems before restoring the unit to service,” said Byron Station Site Vice President Tim Tulon. “Byron Station’s redundant safety systems are designed to operate if needed, and the systems passed with flying colors.” 

An Unusual Event is the lowest of four emergency classifications established by the U.S. Nuclear Regulatory Commission.

The two-unit Byron Generating Station is located in Byron, Ill., about 25 miles southwest of Rockford. 

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