Two local Exelon Corp. nuclear plants are alerting area residents to maintenance at the facilities.

Peach Bottom Atomic Power Station on Sunday completed a refueling outage during which operators performed maintenance to keep Unit 3 running safely and efficiently, according to a company news release.

The unit had been out of service since Sept. 9 so workers could execute upgrades, allowing the Delta station to generate more power, and enhance the safety and electricity-generation equipment.

"The safe and reliable operation of Peach Bottom Atomic Power Station is always our top priority. Refueling outages are critical in assuring plant safety and long-term equipment reliability," said site vice president Mike Massaro.

As Peach Bottom's refueling outage ended, Three Mile Island's began.

More than 1,700 technical workers are in the region to support the Dauphin County plant's outage that began shortly after midnight Monday.

During the outage, workers will perform inspections, equipment upgrades and maintenance work, according to a press release.

The outages also add a boost to the local economy.

"We see a significant impact on our business from Three Mile Island's refueling outages," said Steve Tremmel, general manager at Wyndham Gardens Hotel Harrisburg/Hershey. "Our bookings go way up and I am sure other local restaurants and hotels see increased business as well."

Both Three Mile Island and Peach Bottom perform outages every two years to modernize the stations' systems. Together they generate enough electricity for about 3 million homes.

- Candy Woodall can also be reached at cwoodall@yorkdispatch.com.