DNP-TIP-2022–07, Steam Generator Inspection Frequency Extension

Sequoyah Nuclear Plant (SQN) requested and received approval from the NRC for a reduced frequency of Steam Generator (SG) inspections for Unit 1. The NRC approval of the SQN Unit 1 Inspection Frequency License Amendment Request (LAR) establishes the first greater than three cycle SG inspection interval in the industry. TVA participated in an EPRI-led initiative to revise SG technical specifications (TS). TVA was the first to submit a license amendment request to the NRC that utilizes EPRI’s Steam Generator Management Program’s Operational Assessment (OA) methodologies.  EPRI’s Integrity Assessment Guidelines provides the technical bases to ensure the industry is performing SG inspections at the appropriate intervals.  The technical bases rely, in part, on extensive industry performance data.