Operators at PPL Corp.'s Susquehanna nuclear power plant in Luzerne County, Pa., disconnected November 19 from the regional power grid shortly after returning to service because of a hydraulic oil leak on a system that controls the flow of steam into the turbine.
Operators are manually shutting down the reactor and plant systems are responding as designed. Susquehanna employees are investigating the cause of the oil leak.
"Shutting down the reactor is the safest course of action until we can determine the reason for the oil leak and make the necessary repair," said Timothy S. Rausch, PPL Susquehanna senior vice president and chief nuclear officer. "All systems are functioning as expected to keep the unit in a safe condition."
The oil leak is not affecting employee or public safety and is contained within the turbine building. Unit 1 is operating at full power.
Unit 2 at Susquehanna nuclear power plant resumed generating electricity for the regional power grid November 19 after completing a turbine blade inspection and repairing a computer system that malfunctioned on November 9, causing operators to shut down the reactor.
The previously announced turbine inspection revealed signs of cracking on a small number of blades. Those blades have been replaced.
The Susquehanna plant, located in Luzerne County about seven miles north of Berwick, is owned jointly by PPL Susquehanna LLC and Allegheny Electric Cooperative Inc. and is operated by PPL Susquehanna LLC.
PPL Susquehanna LLC is one of PPL Corp.'s generating affiliates. Headquartered in Allentown, Pa., PPL owns or controls through its subsidiaries about 19,000 MW of generating capacity in the U.S., sells energy in U.S. markets, and delivers electricity and natural gas to about 10 million customers in the U.S. and the U.K.