ML21188A361

1Q 2021 Performance Summary U4

ML21188A361
Person / Time
Site:	Vogtle
Issue date:	07/06/2021
From:	NRC/NRR/VPOB
To:
Armstrong G
References
Download: ML21188A361 (3)

Text

Vogtle Unit 4 1Q/2021 Performance Summary Construction Action Matrix Column:

Licensee Response Construction Safeguards Operational Reactor Safety Programs Readiness Design/ Procurement/ Construction/ Inspection/ Security Operational Engineering Fabrication Installation Testing Programs Programs Most Significant Inspection Findings No findings No findings No findings No findings No findings No findings 1Q/2021 this quarter this quarter this quarter this quarter this quarter this quarter No findings No findings No findings No findings No findings 4Q/2020 this quarter G this quarter this quarter this quarter this quarter No findings No findings No findings No findings No findings No findings 3Q/2020 this quarter this quarter this quarter this quarter this quarter this quarter No findings No findings No findings No findings No findings No findings 2Q/2020 this quarter this quarter this quarter this quarter this quarter this quarter Additional Inspection and Assessment Information List of Construction Inspection Reports List of Construction Assessment Reports/Inspection Plans Vogtle Unit 4 Findings Archive

Design Engineering Back to Top Procurement/Fabrication Back to Top Construction/Installation Back to Top Inspection/Testing Identified By: NRC Identification Date: 11/04/2020 Significance: Green Item Type: ITAAC Finding Report: Vogtle Electric Generating Plant, Units 3 And 4 - NRC Integrated Inspection Reports 05200025/2020004, 05200026/2020004 Item Number: 05200026/2020002-02 Note: Closed in Report (NCV)

Failure to Construct and Perform Quality Inspections on the Battery Racks for the Class 1E DC and Uninterruptible Power Supply System The inspectors identified an ITAAC finding of very low safety significance with an associated NCV of 10 CFR 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings. The licensee failed to construct and perform quality inspections on Unit 3 and Unit 4 Class 1E DC and uninterruptible power supply system (IDS) battery racks for the 250 Vdc 24-hour, 72-hour, and spare batteries in accordance with ITAAC 2.6.03.02.i and the approved design requirements for Vogtle Units 3 and 4. The licensee entered this finding into its CAP as CR 50066999, conducted engineering analysis of the nonconforming conditions, and performed rework on the battery racks to correct the nonconforming conditions.

This performance deficiency was of more than minor safety significance, and thus a finding, because it was material to the acceptance criteria of an ITAAC and invalidated the Inspection, Test, or Analyses described in the ITAAC 2.6.03.02.i. This finding was not associated with a security program; it was not associated with an IMC 2504 operational or construction program; and it was not associated with a repetitive, NRC-identified omission of a program critical attribute. This finding was a licensee performance deficiency of very low safety significance because it was associated with the IDS and there was reasonable assurance the design function of the system would not have been impaired by the deficiency based on engineering analysis of the nonconforming conditions identified. The inspectors determined this finding was indicative of present licensee performance and affected the cross-cutting area of human performance and the cross-cutting aspect of avoiding complacency. The proximate cause of the performance deficiency was primarily attributed to a failure to perform a thorough review of the work instructions and to plan the activity every time without relying on past successes and assumed conditions.

[H.12] (Section 1A15)

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