Exelon Generation and local emergency management agencies plan to conduct up to six tests of Three Mile Island's emergency warning sirens on Thursday.
Exelon spokesman Ralph DeSantis said the first test will be held at approximately 8 a.m. and each test will last about three minutes.
The company recently completed the installation of 96 new sirens in the 10-mile radius around the nuclear power plant and must now test the system to meet the requirements of the Federal Emergency Management Agency.
The new sirens have improved sound coverage and a battery back-up to ensure they will able operate during a power outage.
The purpose of the sirens is to notify residents to tune into an Emergency Alert System radio or television station in case of an emergency at TMI, or tornadoes, floods, or other events requiring notification to residents.