After the first application was deemed insufficient by federal officials, Exelon Generation has resubmitted an application to increase its power output at Peach Bottom Atomic Power Station.

The U.S. Nuclear Regulatory Commission on Monday announced it accepted a second application from the company, which wants to boost power by 12.4 percent at both of the Delta plant's nuclear reactors.

It's common to go through multiple rounds of submitting information during applications to increase generation capacity, said Lacey Dean, Peach Bottom spokeswoman.

After Exelon's first application last year, the NRC said it lacked sufficient information about the safety evaluation template, the steam dryer analysis and the emergency core cooling system analysis.

That information has since been provided, according to Neil Sheehan, NRC spokesman.

The commission's standard review time for a power uprate application is 18 months after the federal agency's formal acceptance of the submittal, he said.

"We want to make sure the power uprate is done safely, so it takes a great deal of review," Sheehan said.

A 12.4 percent increase is the largest power uprate Exelon has applied for at Peach Bottom, he said.

Nearly 20 years ago, the plant's Unit 2 reactor was approved for a 5 percent power uprate in 1994. A year later, its Unit 3 reactor was also approved for a 5 percent increase. And 11 years ago both units were approved for a 1.6 percent boost in 2002, Sheehan said.


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Those uprates were much smaller than the one Exelon is now seeking. The 12.4 percent increase will require modification at the plant, such as new pumps, turbines, highly enriched uranium fuel and other equipment, he said.

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