PJM Interconnection on March 16 filed at the Federal Energy Regulatory Commission an executed Interconnection Service Agreement with Exelon Generating Co. LLC and transmission owner PECO Energy for an uprated Peach Bottom nuclear plant.
This new Exelon ISA supersedes a prior ISA among these same parties. “The Exelon ISA facilitates an increase in capacity of Peach Bottom Units #2 and #3, a nuclear facility, located in Delta, Pennsylvania,” said the PJM filing. “The Maximum Facility Output (‘MFO’) of the Customer Facility associated with the Exelon ISA is 2,665.8 MW, which represents an increase of 133.8 MW over the prior Interconnection Request.”
The filing added: “The Exelon ISA indicates that Peach Bottom Units #2 and #3 each will have 1285 MW of Capacity Interconnection Rights, each consisting of 1182 MW associated with the prior ISA plus an additional 103 MW each as a result of the Exelon ISA.”
The ISA said the uprates will be the result of Nuclear Regulatory Commission-approved extended power uprate projects, with the new capacity at Unit 2 due to be in commercial operation by Dec. 1, 2015, and the additional capacity at Unit 3 to be commercially operating by Dec. 1, 2016.
The Nuclear Regulatory Commission said in August 2014 that it had approved a request by Exelon Generation to increase the generating capacity of Peach Bottom Units 2 and 3 by 12.4% each. The power uprate approval authorizes Peach Bottom, located about 18 miles south of Lancaster, Pa., to increase each boiling water reactor’s generating capacity by approximately 140 MW electric.
Peach Bottom is co-owned by Exelon Generation, which is a unit of Exelon (NYSE: EXC), and Public Service Enterprise Group (NYSE: PEG). Exelon Nuclear operates the two units at Peach Bottom that are currently in operation. Both Units 2 and 3 are boiling water reactors each capable of generating 1,140 MW. These units began commercial operation in 1974. Unit 1, which is no longer active, was a 40-MW experimental reactor.
The amendments authorize an increase in the maximum licensed thermal power level for Units 2 and 3 from 3514 megawatts thermal (MWt) to 3951 MWt, which is an increase of approximately 12.4%. The NRC considers the requested increase in power level to be an extended power uprate (EPU).