IR 05000424/2022004

Integrated Inspection Report 05000424/2022004 and 05000425/2022004

ML23018A287
Person / Time
Site:	Vogtle
Issue date:	01/23/2023
From:	Alan Blamey Division Reactor Projects II
To:	Gayheart C Southern Nuclear Operating Co
References
IR 2022004
Download: ML23018A287 (10)

Text

January 23, 2023

SUBJECT:

VOGTLE ELECTRIC GENERATING PLANT, UNITS 1 AND 2 - INTEGRATED INSPECTION REPORT 05000424/2022004 AND 05000425/2022004

Dear Cheryl A. Gayheart:

On December 31, 2022, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Vogtle Electric Generating Plant, Units 1 and 2. On January 12, 2023, the NRC inspectors discussed the results of this inspection with Mr. Sonny Dean, Site Vice President, and other members of your staff. The results of this inspection are documented in the enclosed report.

No findings or violations of more than minor significance were identified during this inspection.

This letter, its enclosure, and your response (if any) will be made available for public inspection and copying at http://www.nrc.gov/reading-rm/adams.html and at the NRC Public Document Room in accordance with Title 10 of the Code of Federal Regulations 2.390, Public Inspections, Exemptions, Requests for Withholding.

Sincerely, Signed by Blamey, Alan on 01/23/23 Alan J. Blamey, Chief Reactor Projects Branch 2 Division of Reactor Projects Docket Nos. 05000424 and 05000425 License Nos. NPF-68 and NPF-81

Enclosure:

As stated,

Inspection Report

Docket Numbers: 05000424 and 05000425 License Numbers: NPF-68 and NPF-81 Report Numbers: 05000424/2022004 and 05000425/2022004 Enterprise Identifier: I-2022-004-0021 Licensee: Southern Nuclear Operating Company, Inc.

Facility: Vogtle Electric Generating Plant, Units 1 and 2 Location: Waynesboro, GA Inspection Dates: October 01, 2022, to December 31, 2022 Inspectors: B. Caballero, Senior Operations Engineer T. Fanelli, Senior Reactor Inspector T. Morrissey, Senior Resident Inspector D. Parent, Project Engineer Approved By: Alan J. Blamey, Chief Reactor Projects Branch 2 Division of Reactor Projects Enclosure

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at Vogtle Electric Generating Plant, Units 1 and 2, in accordance with the Reactor Oversight Process. The Reactor Oversight Process is the NRCs program for overseeing the safe operation of commercial nuclear power reactors. Refer to https://www.nrc.gov/reactors/operating/oversight.html for more information.

List of Findings and Violations

No findings or violations of more than minor significance were identified.

Additional Tracking Items

None.

PLANT STATUS

Unit 1 began the inspection period at rated thermal power (RTP). On November 26, 2022, the unit was down powered to 92 percent for quarterly main turbine valves stroke test and returned to RTP on November 27, 2022. The unit remained at or near RTP for the remainder of the inspection period.

Unit 2 began the inspection period at RTP. On December 2, 2022, the unit was down powered to 92 percent for quarterly main turbine valves stroke test and returned to RTP. The unit remained at or near RTP for the remainder of the inspection period.

INSPECTION SCOPES

Inspections were conducted using the appropriate portions of the inspection procedures (IPs) in effect at the beginning of the inspection unless otherwise noted. Currently approved IPs with their attached revision histories are located on the public website at http://www.nrc.gov/reading-rm/doc-collections/insp-manual/inspection-procedure/index.html. Samples were declared complete when the IP requirements most appropriate to the inspection activity were met consistent with Inspection Manual Chapter (IMC) 2515, Light-Water Reactor Inspection Program - Operations Phase. The inspectors performed activities described in IMC 2515, Appendix D, Plant Status, observed risk significant activities, and completed on-site portions of IPs. The inspectors reviewed selected procedures and records, observed activities, and interviewed personnel to assess licensee performance and compliance with Commission rules and regulations, license conditions, site procedures, and standards.

71111.04 - Equipment Alignment

Partial Walkdown Sample (IP Section 03.01) (2 Samples)

The inspectors evaluated system configurations during partial walkdowns of the following systems/trains:

(1) Unit 2, train "A" emergency diesel generator (EDG) while train "B" EDG was out of service (OOS) for planned maintenance, from October 23 to November 2, 2022.

(2) Unit 2, train "B" EDG while train "A" EDG was OOS for planned maintenance, from December 4 to December 15, 2022.

Complete Walkdown Sample (IP Section 03.02) (1 Sample)

(1) Unit 2, train "B" EDG and supporting systems following a major system outage, on November 2, 2022.

71111.05 - Fire Protection

Fire Area Walkdown and Inspection Sample (IP Section 03.01) (4 Samples)

The inspectors evaluated the implementation of the fire protection program by conducting a walkdown and performing a review to verify program compliance, equipment functionality, material condition, and operational readiness of the following fire areas (FAs):

(1) Fire zones 19, 20, unit 1 trains "A" and "B" centrifugal charging pump (CCP) pump rooms, on October 09, 2022.

(2) Fire zones 105, 106, 183A, 601, 602, 603, 604 and 605, technical support center and units 1 and 2 main control room, on October 4, 2022.

(3) Fire zones 60, 61, 62, 63, 64 and 82, unit 1 control building Level "B" east and west penetration areas, on November 14, 2022.

(4) Fire zones 19, 20, unit 2 trains "A" and "B" CCP pump rooms, on December 1, 2022.

71111.11A - Licensed Operator Requalification Program and Licensed Operator Performance

Requalification Examination Results (IP Section 03.03) (1 Sample)

(1) On August 18, 2022, the licensee completed administering the annual requalification operating tests and on November 23, 2022, the licensee completed administering the biennial written examinations, which are both required to be administered to all licensed operators in accordance with Title 10 of the Code of Federal Regulations 55.59(a)(2), "Requalification Requirements," of the NRC's "Operator's Licenses." During the week of December 19, 2022, the inspector performed an in-office review of the overall pass/fail results of the individual/crew operating tests and the biennial written examinations in accordance with IP 71111.11, "Licensed Operator Requalification Program." These results were compared to the thresholds established in Section 3.03, "Requalification Examination Results," of IP 71111.11.

The inspectors reviewed and evaluated the licensed operator examination failure rates for the requalification annual operating test and biennial written exam, which the licensee completed administering on November 23, 2022.

71111.12 - Maintenance Effectiveness

Maintenance Effectiveness (IP Section 03.01) (1 Sample)

The inspectors evaluated the effectiveness of maintenance to ensure the following structures, systems, and components (SSCs) remain capable of performing their intended function:

(1) Unit 1, nuclear service cooling water (NSCW) system, on November 16, 2022.

Quality Control (IP Section 03.02) (1 Sample)

The inspectors evaluated the effectiveness of maintenance and quality control activities to ensure the following SSC remains capable of performing its intended function:

(1) Unit 2, train "B" EDG system, including planned maintenance on November 2, 2022.

71111.13 - Maintenance Risk Assessments and Emergent Work Control

Risk Assessment and Management Sample (IP Section 03.01) (4 Samples)

The inspectors evaluated the accuracy and completeness of risk assessments for the following planned and emergent work activities to ensure configuration changes and appropriate work controls were addressed:

(1) Unit 1, train "B" EDG OOS due to planned maintenance on the lube oil heat exchanger, on October 4, 2022.

(2) Unit 2, train "B" EDG OOS due to an emergent phase A-B potential transformer (PT)and primary fuses replacement, on October 15, 2022.

(3) Unit 2, elevated risk (Yellow) due to train "B" EDG OOS for planned maintenance, from October 23 to November 2, 2022.

(4) Unit 2, elevated risk (Yellow) due to train "A" EDG OOS for planned maintenance, from December 4 to December 15, 2022.

71111.15 - Operability Determinations and Functionality Assessments

Operability Determination or Functionality Assessment (IP Section 03.01) (4 Samples)

The inspectors evaluated the licensee's justifications and actions associated with the following operability determinations and functionality assessments:

(1) Condition report (CR) 10915250, unit 2 4160-volt engineering safeguards bus, 2BA03, phase A-B pot light found not lit, on November 16, 2022.

(2) CR 10925852, unit 2 train "B" EDG jacket water leakage, on November 22, 2022.

(3) CR 10919159, unit 2 train "B" NSCW pump no. 4 variable spring support found at the bottom of the travel (i.e., bottomed out), on October 28, 2022.

(4) CR 10920743, unit 2 train "A" NSCW variable spring support, 2K5-1202-181-01, setting discrepancy, on November 8, 2022.

71111.19 - Post-Maintenance Testing

Post-Maintenance Test Sample (IP Section 03.01) (7 Samples)

The inspectors evaluated the following post-maintenance testing activities to verify system operability and/or functionality:

(1) 14802B-2, "Train B NSCW Pump/Check Valve IST and Response Time Test (NSCW Pump 4)," after unit 2 NSCW pump no. 4 outage; work orders (WOs) SNC956638, SNC1060726, SNC1100452, on October 5, 2022.

(2) 14825-2, Quarterly Inservice Valve Test, (2HV-5134 valve only), after unit 2 motor driven auxiliary feedwater (MDAFW) pump discharge valve to steam generator no. 3, 2HV-5134, was inspected/tested; WO SNC1358908, on October 6, 2022.

(3) 14633-2, "SSPS Slave Relay K 648 Train B Test Safety Injection," unit 2 train B essential chiller water system maintenance, relay replacements, and test; WOs SNC1062504 and SNC690146, on October 7, 2022.

(4) 25738-C, "Potential Transformer (PT) Testing," unit 2 train B EDG phase A-B PT testing after replacement of the PT and two primary fuses; WO SNC1391748, on October 15, 2022.

(5) 14980B-2, "Diesel Generator 2B Operability Test," (fast start) after unit 2 train B EDG planned maintenance that included engine inspections, instrument calibration, and relay replacement maintenance; WOs SNC1110086, SNC110237, SNC110428, SNC894416, on November 2, 2022.

(6) 14710C-1, 14810-1 and 14546-1, unit 1 turbine-driven auxiliary feedwater transfer control hand switch, 1HS5180, replacement; WOs SNC1038276 and SNC 1299798, on November 16, 2022.

(7) 14980A-2, "Diesel Generator 2A Operability Test," (fast start) after unit 2 train A planned maintenance that included engine inspections, instrument calibration, relay replacement maintenance; WOs SNC112650, SNC1126506, SNC1126536, SNC1219043 and SNC1126497, on December 15, 2022.

71111.22 - Surveillance Testing

The inspectors evaluated the following surveillance testing activities to verify system operability and/or functionality:

Surveillance Tests (other) (IP Section 03.01) (2 Samples)

(1) 14150A-2, "Train A NSCW Fan/Spray Valve Surveillance," on October 12, 2022.

(2) 24700-2, "Nuclear Instrumentation System Power Range Channel 2N41 Channel Calibration," on November 15,

OTHER ACTIVITIES - BASELINE

===71151 - Performance Indicator Verification The inspectors verified licensee performance indicators submittals listed below:

MS05: Safety System Functional Failures (SSFFs) Sample (IP Section 02.04) ===

(1) Unit 1 (October 1, 2021 - September 30, 2022)

(2) Unit 2 (October 1, 2021 - September 30, 2022)

MS06: Emergency AC Power Systems (IP Section 02.05) (2 Samples)

(1) Unit 1 (October 1, 2021 - September 30, 2022)

(2) Unit 2 (October 1, 2021 - September 30, 2022)

MS10: Cooling Water Support Systems (IP Section 02.09) (2 Samples)

(1) Unit 1 (October 1, 2021 - September 30, 2022)

(2) Unit 2 (October 1, 2021 - September 30, 2022)

71152A - Annual Follow-up Problem Identification and Resolution Annual Follow-up of Selected Issues (Section 03.03)

The inspectors reviewed the licensees implementation of its corrective action program related to the following issues:

(1) EDG barring device issues, CRs10912378 and 10890894.

71152S - Semiannual Trend Problem Identification and Resolution Semiannual Trend Review (Section 03.02)

(1) The inspectors reviewed the licensees corrective action program for potential adverse trends in emergency planning equipment issues that might be indicative of a more significant safety issue.

INSPECTION RESULTS

No findings were identified.

EXIT MEETINGS AND DEBRIEFS

The inspectors verified no proprietary information was retained or documented in this report.

On January 12, 2023, the inspectors presented the integrated inspection results to Mr.

Sonny Dean, Site Vice President, and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.04 Procedures 11145-2 Diesel Generator Alignment 14.1

71111.04 Procedures 13145B-2 Diesel Generator Train B 15.0

71111.12 Work Orders SNC 1169120 Unit 2 "B" train repair unexpected control room alarm ALB38- 6.1

and Procedure F03 DG2B High Pressure Starting Air / Calibrate Non-trip

23927-2 Pressure Switches 10/24/2022-10/25/2022

71111.12 Work Orders SNC1110086 22403G4002 B TRN EDG 002 Injector - Testing 10/24/2022

71111.19 Procedures 14546-1 Turbine-Driven Auxiliary Feedwater Pump Operability Test 34

71111.19 Procedures 14710C-1 Turbine-Driven AFW Remote Shutdown Panel Transfer 3.0

Switch and Control Circuit 18 Month Surveillance Test

71111.19 Procedures 14810-1 TDAFW Pump & Check Valve IST Response Time Test 53.2

71111.19 Procedures GEN-95- Preparing Engine for Operation 21.0

CHAPTER-47

71111.19 Procedures Gen-95- Operation of Engine 31.2

CHAPTER-48

71152S Corrective Action 10926635,

Documents 10915305,

10908372,

10900190

8