NRC to Begin Special Inspection at Oconee Nuclear Power Plant

 NRC to Begin Special Inspection at Oconee Nuclear Power Plant

Degraded power cables led to a special inspection at Duke Energy’s (NYSE: DUK) Oconee nuclear power plant in South Carolina.
During routine inspections on Dec. 7, a plant operator found a disconnected cable that should have been connected to the Unit 3 startup transformer. Upon further inspection, the operator found other cables linked to the Unit 1 startup transformer were in a degraded condition. All of the cables were repaired and are available for use if needed.
The transformers provide electrical power to plant safety equipment. They were not in use when the degraded cables were discovered, but the U.S. Nuclear Regulatory Commission said the special inspections were necessary to gather more information about Duke’s response and determine if there were other issues that may apply to other plants.
The on-site inspectors are the senior resident inspector from the Oconee plant and an inspector from the NRC’s Region II office in Atlanta. The team will review the circumstances surrounding the degradation and failure of the cables and the utility’s actions after the degraded conditions were identified. The team will also develop a timeline on when the cables were damaged, and review Duke’s testing and maintenance practices. Results of the special inspection should be issued within 45 days of completion.
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