Operators took unit 2 at Pennsylvania's Susquehanna nuclear plant offline Friday after a computer malfunction.
According to a PPL release, the plant lost a computer system that controls water levels in the reactor. The subsequent manual shutdown proceeded normally, and other plant systems performed as designed.
"Our operators are well-trained to manage situations like this," PPL Susquehanna chief nuclear officer Timothy S. Rausch said in the release. "All systems are functioning as expected to keep the unit in a safe condition."
In addition to addressing the control system, crews also planned to conduct a turbine blade inspection announced earlier. Unit 1 at the plant returned to service on Wednesday following a similar inspection that revealed cracking on a small number of blades that were then replaced. The inspections and diagnostic equipment installed in the spring follow previous blade cracking issues at Susquehanna.
Both units at the plant 70 miles northeast of Harrisburg, Pa., use General Electric type 4 boiling water reactors licensed in the 1980s, according to the Nuclear Regulatory Commission. They each produce about 1,150 megawatts.