Limerick Power Plant Replacing Emergency Sirens

New sirens to include battery back-up power

POTTSTOWN, PA (Sept. 24, 2009) – Exelon Nuclear will begin a project next week to replace
all 165 emergency sirens in the 10 miles around Limerick Generating Station with sirens that
include battery back up. The first phase of the project will have contractors visit and identify certain features of each existing siren.

The initial phase of this project will take approximately 60 days. Installation of the new sirens will begin in 2010. The new and old sirens will run concurrently for a 4-month period to ensure they operate properly. Completion of the project and removal of the existing sirens is scheduled for 2011.

“The sirens are an important part of our emergency plan, and they also benefit the three counties that are able to use the sirens for any emergency,” said Chris Mudrick, Limerick Site Vice President. “The battery back-up will add an additional layer of confidence in our emergency preparedness system. While we are confident in our current siren system, the model we currently use is nearing the end of its service life and it is time to proactively replace all of the sirens with the best available technology.”

Contractors performing the first phase of the project will be from ANS Services and individuals performing work will be required to have a company photo ID. Please remember that any contractor wishing to enter a property should produce the proper company ID upon request.

This $3.8 million investment around Limerick is part of Exelon Nuclear’s commitment to replace and upgrade the emergency sirens at all of the sites in the mid-Atlantic including Three Mile Island, Peach Bottom Atomic Power Station, and Oyster Creek Generating Station.
This project will involve a total investment of more than $9 million and the replacement of 400 sirens.

The warning sirens are one of several methods used by county emergency management
authorities to provide notification of emergencies. Individual counties may activate the sirens to warn the surrounding community of events such as fires, floods, tornados, hazardous material releases, or nuclear energy plant events. The sirens are not a signal to evacuate, but to tune to the local Emergency Alert Station.

Limerick Generating Station is located approximately 30 miles northwest of Philadelphia. The
plant produces approximately 2,200 net megawatts of electricity per hour, enough to power
approximately two million homes.

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Exelon Corporation is one of the nation’s largest electric utilities. The company has one of the industry’s largest portfolios of electricity generation capacity, with a nationwide reach and strong positions in the Midwest and Mid-Atlantic. Exelon distributes electricity to approximately 5.4 million customers in northern Illinois and southeastern Pennsylvania and natural gas to approximately 485,000 customers in the Philadelphia area. Exelon is headquartered in Chicago and trades on the NYSE under the ticker EXC.

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Tags: Limerick Power Plant