IR 05000338/2024003
| ML24302A155 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 10/28/2024 |
| From: | Matthew Fannon NRC/RGN-II/DORS/PB2 |
| To: | Carr E Dominion Energy |
| References | |
| IR 2024003 | |
| Download: ML24302A155 (11) | |
Text
SUBJECT:
NORTH ANNA POWER STATION, UNITS 1 AND 2 - INTEGRATED INSPECTION REPORT 05000338/2024003 AND 05000339/2024003
Dear Eric S. Carr:
On September 30, 2024, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at North Anna Power Station, Units 1 and 2. On October 10, 2024, the NRC inspectors discussed the results of this inspection with Lisa Hilbert, 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, Matthew S. Fannon, Chief Projects Branch 2 Division of Operating Reactor Safety Docket Nos. 05000338 and 05000339 License Nos. NPF-4 and NPF-7
Enclosure:
As stated
Inspection Report
Docket Numbers:
05000338 and 05000339
License Numbers:
Report Numbers:
05000338/2024003 and 05000339/2024003
Enterprise Identifier:
I-2024-003-0024
Licensee:
Dominion Energy
Facility:
North Anna Power Station, Units 1 and 2
Location:
Mineral, VA
Inspection Dates:
July 1, 2024 to September 30, 2024
Inspectors:
K. Carrington, Senior Resident Inspector
J. Hickman, Senior Resident Inspector
D. Johnson, Senior Emergency Preparedness Specialist
B. Kellner, Senior Health Physicist
D. Turpin, Resident Inspector
J. Walker, Senior Emergency Preparedness Inspector
Approved By:
Matthew S. Fannon, Chief
Projects Branch 2
Division of Operating Reactor Safety
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at North Anna Power Station, 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 operated at or near rated thermal power (RTP) for the entire inspection period.
Unit 2 operated at or near RTP for the entire 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.
REACTOR SAFETY
71111.01 - Adverse Weather Protection
Impending Severe Weather Sample (IP Section 03.02) (1 Sample)
- (1) The inspectors evaluated the adequacy of the overall preparations to protect risk-significant systems from impending severe weather, Tropical Storm Ernesto, the week of August 6, 2024.
71111.04 - Equipment Alignment
Partial Walkdown Sample (IP Section 03.01) (4 Samples)
The inspectors evaluated system configurations during partial walkdowns of the following systems/trains:
- (1) Unit 1 'A' motor-driven auxiliary feedwater (MDAFW) system walkdown during testing of the Unit 1 'B' MDAFW system, on July 25, 2024
- (2) Unit 2 'J' emergency diesel generator (EDG) system walkdown during Unit 2 'H' EDG planned maintenance, on August 1, 2024
- (3) Unit 2 'B' charging system walkdown following testing, on September 5, 2024
- (4) Unit 2 'A' and 'B' MDAFW system walkdown during Unit 2 turbine-driven AFW system testing, on September 20, 2024
71111.05 - Fire Protection
Fire Area Walkdown and Inspection Sample (IP Section 03.01) (6 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:
- (1) Fire Zone 4-2, Unit 2 cable tray spreading room, on August 2, 2024
- (4) Fire Zone 4-1, Unit 1 cable tray spreading room, on August 20, 2024
71111.06 - Flood Protection Measures
Flooding Sample (IP Section 03.01) (1 Sample)
- (1) The inspectors evaluated internal flooding mitigation protections in the auxiliary building basement (254' elevation), on August 1, 2024.
71111.11Q - Licensed Operator Requalification Program and Licensed Operator Performance
Licensed Operator Performance in the Actual Plant/Main Control Room (IP Section 03.01) (1 Partial)
(1)
(Partial)
The inspectors observed and evaluated licensed operator performance in the control room during Unit 2 control rod operability testing, on September 24, 2024.
Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)
- (1) The inspectors observed licensed operator requalification training scenario SXG-61 in the control room simulator, on September 3, 2024.
71111.12 - Maintenance Effectiveness
Maintenance Effectiveness (IP Section 03.01) (3 Samples)
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 'C' charging system (Condition report (CR) 1203708, CR1036687, CR1106340, CR1207623), on August 13, 2024
- (2) Fire protection system (CR1258197, CR1252551, CR1257617, CR 1198378, CR1202360, CR1253026, CR1260222), on August 13, 2024
- (3) Independent spent fuel storage installation dry shielded canisters NAN-EOS-37PTH-001-B through -006-B (quality control, CR1262873), on September 10, 2024
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 1 'A' reactor coolant pump shaft procurement and machining associated with work order (WO) 59203426350, on September 16, 2024
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 increased online risk associated with emergent maintenance on the Unit 1 'J' EDG and station blackout diesel generator, the week of July 22, 2024
- (2) Unit 2 increased online risk associated with the Unit 2 'H' EDG planned maintenance outage, the week of July 29, 2024
- (3) Unit 1 and 2 increased online risk associated with the 'C' reserve station service transformer and the 'A' and 'B' service water header planned maintenance outage, the week of August 12, 2024
- (4) Units 1 and 2 increased online risk associated with 34.5 kV bus 3 and 500 kV bus 1 planned maintenance; Unit 1 and Unit 2 nuclear instrumentation data gathering first-time evolution; and Unit 2 rod operability surveillance, on September 24, 2024
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) CR1263511, Air pressure in 0-BSA-TK-2 has decreased to 68 psig, on July 24, 2024
- (2) CR1265425, 2-HV-MOV-204-1 failed to open when placing main control room in pressurization mode, on August 9, 2024
- (3) CR1267369, Time stroke close of 1-MS-TV-111B near minimum allowed stroke time, on August 27, 2024
- (4) CR1267887, 2-RC-MOV-2535 (PORV Block Valve) is approaching its maximum stroke time, on September 9, 2024
71111.18 - Plant Modifications
Temporary Modifications and/or Permanent Modifications (IP Section 03.01 and/or 03.02) (2 Samples)
The inspectors evaluated the following temporary or permanent modifications:
- (1) Design Change, NA-22-00076, Unit 1 'A' reactor coolant pump replacement, on September 16, 2024
- (2) STI-N12-2017-003, EDG surveillance test interval frequency change (dated 03/20/2019), on September 24, 2024
71111.24 - Testing and Maintenance of Equipment Important to Risk
The inspectors evaluated the following testing and maintenance activities to verify system operability and/or functionality:
Post-Maintenance Testing (PMT) (IP Section 03.01) (4 Samples)
- (1) Station blackout diesel PMT following planned maintenance under WO59203443948, on July 26, 2024
- (2) Unit 2 'H' EDG PMT following three-year maintenance outage under WO59203369672, on August 5, 2024
- (3) Unit 1 'B' component cooling water pump PMT following bearing repair under WO59203418057, on September 27, 2024
- (4) Unit 2 'B' main control room chiller service water piping PMT following strainer cleaning under WO59203449018, on September 30, 2024
Surveillance Testing (IP Section 03.01) (1 Sample)
(1)1-PT-81.1B, Emergency Diesel Generator Fuel Oil Transfer Pumps 1-EG-1JA and 1-EG-1JB Quarterly Test, on July 24, 2024
Inservice Testing (IST) (IP Section 03.01) (1 Sample)
(1)1-PT-71.3Q.1, 1-FW-P-3B Motor-driven AFW Comprehensive Pump Test, on July 25, 2024
71114.01 - Exercise Evaluation
Inspection Review (IP Section 02.01-02.11) (1 Sample)
- (1) The inspectors evaluated the biennial emergency plan exercise during the week of July 15, 2024. The simulated scenario began when a fuel assembly is dropped on top of other assemblies in the fuel pool. Bubbles from the pool release to the atmosphere setting off area alarms, prompting the operating crew to declare an Alert. Later, with the rupture of the main condensate pipe and failure of the auxiliary feedwater pumps, the threshold for potential loss of both the fuel cladding and the reactor coolant system is met and a Site Area Emergency is declared. Lastly, when a loss of coolant accident occurs, containment radiation monitors reach threshold levels and a General Emergency is declared. This allowed the Offsite Response Organizations the opportunity to demonstrate their ability to implement emergency actions.
71114.04 - Emergency Action Level and Emergency Plan Changes
Inspection Review (IP Section 02.01-02.03) (1 Sample)
- (1) The inspectors evaluated submitted emergency action level, emergency plan, and emergency plan implementing procedure changes during the week of July 15, 2024. This evaluation does not constitute NRC approval.
71114.08 - Exercise Evaluation - Scenario Review
Inspection Review (IP Section 02.01 - 02.04) (1 Sample)
- (1) The inspectors reviewed and evaluated in-office, the proposed scenario for the biennial emergency plan exercise at least 30 days prior to the day of the exercise.
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 (July 1, 2023 to June 30, 2024)
- (2) Unit 2 (July 1, 2023 to June 30, 2024)
MS08: Heat Removal Systems (IP Section 02.07) (2 Samples)
- (1) Unit 1 (July 1, 2023 to June 30, 2024)
- (2) Unit 2 (July 1, 2023 to June 30, 2024)
MS10: Cooling Water Support Systems (IP Section 02.09) (2 Samples)
- (1) Unit 1 (April 1, 2023 to March 31, 2024)
- (2) Unit 2 (April 1, 2023 to March 31, 2024)
EP01: Drill/Exercise Performance (DEP) Sample (IP Section 02.12) (1 Sample)
- (1) October 1, 2023 through March 31, 2024 EP02: Emergency Response Organization (ERO) Drill Participation (IP Section 02.13) (1 Sample)
- (1) October 1, 2023 through March 31, 2024 EP03: Alert And Notification System (ANS) Reliability Sample (IP Section 02.14) (1 Sample)
- (1) October 1, 2023 through March 31,
INSPECTION RESULTS
No findings were identified.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
- On October 10, 2024, the inspectors presented the integrated inspection results to Lisa Hilbert and other members of the licensee staff.
- On July 18, 2024, the inspectors presented the emergency preparedness exercise inspection results to Lisa Hilbert and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Calculations
Radiological Dose Assessments Calculations # 1 thru 5
[Including Protective Action Guidance and
Recommendations]
07/16/2024
Station Release Pathways and Release Points (Airborne)
[Applicable to Millstone, North Anna, Surry, and VC Summer]
Revision 0
EP-AA-DAM-101
Core Damage Estimation
Revision 0
EP-AA-DOS-101
Dose Assessment
Revision 0
EP-AA-MIDAS-
1001
PC-MIDAS Guideline
Revision 1
EPIP-1.01
Emergency Manager Controlling Procedure
Revision 58
EPIP-4.01
Radiological Assessment Director Controlling Procedure
Revision 35
Procedures
EPIP-4.34
Field Team Radio Operator Instructions
Revision 9
NA-22-06
CFR 50.54(q) Screening for TSC Relocation
08/18/2022
NA-23-16-0
CFR 50.54(q) Screening for EPIP-4.36, Revision 5,
incorporation of EP-AA-DAM-101 and EP-AA-DOS-101
2/05/2023
NA-23-17-0
CFR 50.54(q) Screening for EPIP-4.03 Incorporation of
EP-AA-DOS-101
2/05/2023
Miscellaneous
NA-24-02-00
CFR 50.54(q) Screening for North Anna Emergency Plan
Rev 54
2/14/2024
VPAP-2601
Maintaining Emergency Preparedness
Revision 35
Procedures
VPAP-2601
Maintaining Emergency Preparedness
Revision 36
71151
Corrective Action
Documents
Condition Report Numbers CR1212602, CR1224209,
CR1239513, CR1240837, CR1241063, CR1243185,
CR1243212, CR1243999, CR1243257, CR1243211,
CR1244009, CR1246802, CR1253807, CR1261356,
CR1262174, and CR1262920.
Various