PPL's operators restart Unit 2 at Susquehanna nuclear plant Operators at PPL's Susquehanna nuclear power plant reconnected Unit 2 to the regional power grid Thursday after repairing a hydraulic system associated with the unit's main turbine. The hydraulic system operates valves that enable steam to bypass the turbine during startup and certain operating conditions. Plant operators detected the leaks as part of routine inspections during startup procedures while at very low power levels. Operators then followed established procedures and safely shut down Unit 2 to allow for repairs. The oil leaks did not affect employee or public safety. Employees quickly cleaned up the leaks and properly disposed of the oil. Unit 1 continues operating safely at full power.