IR 05000338/2023004
| ML24043A064 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 02/12/2024 |
| From: | Matthew Fannon Division Reactor Projects II |
| To: | Carr E Dominion Energy Co |
| References | |
| IR 2023004 | |
| Download: ML24043A064 (12) | |
Text
SUBJECT:
NORTH ANNA POWER STATION, UNITS 1 AND 2 - INTEGRATED INSPECTION REPORT 05000338/2023004 AND 05000339/2023004
Dear Eric S. Carr:
On December 31, 2023, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at North Anna Power Station, Units 1 and 2. On January 18, 2024, the NRC inspectors discussed the results of this inspection with Lisa Hilbert 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 Reactor Projects Branch 4 Division of Reactor Projects 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:
05000338/2023004 and 05000339/2023004
Enterprise Identifier:
I-2023-004-0020
Licensee:
Dominion Energy
Facility:
North Anna Power Station, Units 1 and 2
Location:
Mineral, Virginia
Inspection Dates:
October 01, 2023 to December 31, 2023
Inspectors:
K. Carrington, Senior Resident Inspector
P. Gresh, Operations Engineer
D. Jung, Resident Inspector
S. Kennedy, Senior Resident Inspector
D. Turpin, Resident Inspector
J. Walker, Senior Emergency Preparedness Inspector
Approved By:
Matthew S. Fannon, Chief
Reactor Projects Branch 4
Division of Reactor Projects
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) throughout the entire inspection period.
Unit 2 began the inspection period shut down for refuel outage 2R29. The unit was restarted on October 13, 2023, and returned to RTP on October 16, 2023. On December 18, 2023, the unit was shut down for repairs to the 'B' reactor coolant pump seal return leakoff line. The unit was restarted on December 24, 2023, and returned to RTP on December 31,
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
71111.04 - Equipment Alignment
Partial Walkdown Sample (IP Section 03.01) (1 Sample)
The inspectors evaluated system configurations during partial walkdowns of the following systems/trains:
- (1) Shared spent fuel pit cooling system during Unit 2 core onload, on October 1, 2023
Complete Walkdown Sample (IP Section 03.02) (1 Sample)
- (1) The inspectors evaluated system configurations during a complete walkdown of the Unit 1 high head safety injection system, on November 30, 2023.
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 Area 5-1, Unit 1 normal switchgear room, on October 24, 2023
- (2) Fire Area 5-2, Unit 2 normal switchgear room, on October 24, 2023
- (3) Fire Area 3-2, Unit 2 cable vault and tunnel (Elevation (El.) 254'), on October 24, 2023
- (4) Fire Area 3-2, Zone Z-27-2, control rod drive room (El. 280') and motor generator set house (El. 299'), on October 24, 2023
- (5) Fire Area, 3-1, Unit 1 cable vault and tunnel (El. 254'), on October 24, 2023
- (6) Fire Area, 17-2, Unit 2 mainsteam valve house, on November 6, 2023
Fire Brigade Drill Performance Sample (IP Section 03.02) (1 Sample)
- (1) The inspectors evaluated onsite fire brigade training and performance during an announced fire drill in the Unit 2 casing cooling tank and pump house, on October 27, 2023.
71111.11A - Licensed Operator Requalification Program and Licensed Operator Performance
Requalification Examination Results (IP Section 03.03) (1 Sample)
- (1) The licensee completed the annual requalification operating examinations and biennial written examinations 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." The inspector performed an in-office review of the overall pass/fail results of the individual operating examinations, the crew simulator operating examinations, and the biennial written examinations in accordance with Inspection Procedure (IP) 71111.11, "Licensed Operator Requalification Program and Licensed Operator Performance." These results were compared to the thresholds established in Section 3.03, "Requalification Examination Results," of IP 71111.11.
The inspectors evaluated the licensed operator examination failure rates for the requalification annual operating examinations completed on February 27, 2023, and the biennial written examinations completed on February 17, 2023.
71111.12 - Maintenance Effectiveness
Maintenance Effectiveness (IP Section 03.01) (2 Samples)
The inspectors evaluated the effectiveness of maintenance by reviewing the following events and/or documents to ensure structures, systems, and components (SSCs) remained capable of performing their intended function:
- (1) Condition Report (CR)1239953, Unit 2 'B' reactor coolant pump component cooling water return inside containment isolation valve failure, on November 29, 2023
- (2) Maintenance rule evaluations associated with the following CRs covering the period from May 1, 2021 to October 31, 2023:
- CR1239448, Gripper Failure Alarms Received During Core Onload
- CR1168913 (CA8392344), 1-CC-193 Failed As-Found Type C Testing
Aging Management (IP Section 03.03) (1 Sample)
The inspectors evaluated the effectiveness of the aging management program by reviewing the following events and/or documents associated with SSCs that did not meet their inspection or test acceptance criteria:
(1)
- CR1201215, 2-SW-1014 License Renewal Inspection Was Unsatisfactory
- CR1238457, 2-FW-AOV-2478-4 License Renewal Inspection, Excessive Wear
- CR1215319, 01-FP-211 Valve Disc is Degraded and Has Failed the License Renewal Inspection
71111.15 - Operability Determinations and Functionality Assessments
Operability Determination or Functionality Assessment (IP Section 03.01) (7 Samples)
The inspectors evaluated the licensee's justifications and actions associated with the following operability determinations and functionality assessments:
- (1) CR1235328, 1-SW-MOV-114B Thermal Overload, on October 3, 2023
- (2) CR1233145, Wrong NQC Gauges Used, on October 5, 2023
- (3) CR1239694, 2-SI-RV-2845C, 1B Low Head Safety Injection Pump to Loop Hot Legs Relief Valve, Lifted During Performance of 2-PT-210.2, on October 26, 2023
- (4) CR1237377, Auxiliary Feedwater Check Valve Failed Backseat Test, on November 7, 2023
- (5) CR1243610, Suspected Leak-by on 1-FP-43 Causing Inventory Loss from 1-FP-TK-2, on November 12, 2023
- (6) CR1243987, 1-HV-E-4B Has an Unsatisfactory Temperature Reading on Cylinder 2 While 1-HV-E-4C/4A are Out of Service, on November 15, 2023
- (7) CR1246414, Leakage Observed at Welded Elbow of 2-RC-P-1B Seal Return Line, on December 20, 2023
71111.20 - Refueling and Other Outage Activities
Refueling/Other Outage Sample (IP Section 03.01) (1 Sample 1 Partial)
- (1) The inspectors evaluated Unit 2 refueling outage, 2R29, activities from September 10, 2023 to October 16, 2023.
(2)
(Partial) The inspectors evaluated Unit 2 forced outage activities (IP 71111.20, sections 03.01b through 03.01c.2; 03.01c.4 through 03.01c.6; 03.01c.12 through 03.01d.2) to repair a leak on the 'B' reactor coolant pump seal return line from December 18, 2023 to December 24, 2023.
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) (6 Samples)
(1)2-PT-61.3, Containment Type C Test, following repair of 2-CC-199, component cooling water supply header check valve to the 'B' residual heat removal heat exchanger, under Work Order (WO)59203306361, on September 30, 2023 (2)2-OP-6.9, Slow Start and Operation of 2J Emergency Diesel Generator, following Unit 2 'J' diesel exhaust gasket replacement under WO59203416279, on October 4, 2023 (3)2-PT-64.8, Flow Test of the Inside Recirculation Spray Pumps, following planned maintenance under WO49203386108, on October 7, 2023 (4)2-OP-31.2, Steam Generator Auxiliary Feedwater System, following planned maintenance of the Unit 2 turbine driven auxiliary feedwater governor valve under WO54203323612 and WO59203324255, on October 12, 2023 (5)2-PT-17.2, Rod Drop Time Measurement, following control rod unlatching during
2R29, under WO59203386758, on November 24, 2023 (6)
2-PT-64.1.2, Outside Recirculation Spray Pump 2-RS-P-2B, following planned maintenance under WO59102792868, on November 24, 2023
Inservice Testing (IST) (IP Section 03.01) (1 Sample)
(1)2-PT-71.1Q.1, 2-FW-P-2, Turbine Driven Auxiliary Feedwater IST Comprehensive Pump and Valve Test, on October 12, 2023
71114.02 - Alert and Notification System Testing
Inspection Review (IP Section 02.01-02.04) (1 Sample)
- (1) The inspectors evaluated the maintenance and testing of the alert and notification system during the week of November 13, 2023.
71114.03 - Emergency Response Organization Staffing and Augmentation System
Inspection Review (IP Section 02.01-02.02) (1 Sample)
- (1) The inspectors evaluated the readiness of the Emergency Preparedness Organization during the week of November 13, 2023.
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 November 13, 2023. This evaluation does not constitute NRC approval.
71114.05 - Maintenance of Emergency Preparedness
Inspection Review (IP Section 02.01 - 02.11) (1 Sample)
- (1) The inspectors evaluated the maintenance of the emergency preparedness program during the week of November 13, 2023.
71114.06 - Drill Evaluation
Drill/Training Evolution Observation (IP Section 03.02) (1 Sample)
The inspectors evaluated:
- (1) North Anna Emergency Preparedness Drill NNOV23FS in the simulator, technical support center, and corporate emergency response center, on November 7,
OTHER ACTIVITIES - BASELINE
===71151 - Performance Indicator Verification The inspectors verified licensee performance indicators submittals listed below:
MS06: Emergency AC Power Systems (IP Section 02.05)===
- (1) Unit 1 (October 1, 2022 through September 30, 2023)
- (2) Unit 2 (October 1, 2022 through September 30, 2023)
MS08: Heat Removal Systems (IP Section 02.07) (2 Samples)
- (1) Unit 1 (July 1, 2022 through June 30, 2023)
- (2) Unit 2 (July 1, 2022 through June 30, 2023)
MS09: Residual Heat Removal Systems (IP Section 02.08) (2 Samples)
- (1) Unit 1 (October 1, 2022 through September 30, 2023)
- (2) Unit 2 (October 1, 2022 through September 30, 2023)
EP01: Drill/Exercise Performance (DEP) Sample (IP Section 02.12) (1 Sample)
- (1) April 1, 2022 through September 30, 2023 EP02: Emergency Response Organization (ERO) Drill Participation (IP Section 02.13) (1 Sample)
- (1) April 1, 2022 through September 30, 2023 EP03: Alert And Notification System (ANS) Reliability Sample (IP Section 02.14) (1 Sample)
- (1) April 1, 2022 through September 30, 2023
71152S - Semiannual Trend Problem Identification and Resolution Semiannual Trend Review (Section 03.02)
- (1) CRs related to scaffold not in accordance with Dominion Energy procedure MA-AA-105, (CR1234931, CR1243448, CR1239400, CR1238329, CR1233532, and CR1240436)
INSPECTION RESULTS
Observation: Scaffold Issues Trend 71152S The inspectors reviewed the licensees corrective action program from the period July 1 to December 31, 2023, for a potential adverse trend associated with scaffolding built near safety-related structures, systems, or components, that might be indicative of a more significant safety issue. The inspectors identified six condition reports in which the licensee failed to build scaffold in accordance with Dominion procedure MA-AA-105, Scaffolding.
The inspectors noted no CRs to date that had been initiated to document a trend associated with the scaffolding procedure. The inspectors reviewed the licensees corrective actions taken to address the scaffold issues and noted the licensee performed multiple employee briefings and planned to conduct a performance gap analysis to determine if additional training of their staff is required.
The inspectors ultimately did not determine that the negative trend constituted a more significant safety concern based on their review of licensee actions.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
- On January 18, 2024, the inspectors presented the integrated inspection results to Lisa Hilbert and other members of the licensee staff.
- On November 16, 2023, the inspectors presented the emergency preparedness program inspection results to Lisa Hilbert and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Corrective Action
Documents
CR1177243
EWS Siren 39 did not respond as expected to scheduled
siren polling
Corrective Action
Documents
CR1177243
0-PT-172.6 "Quarterly Siren Activation" Complete with 2
discrepancies.
Corrective Action
Documents
CR1187115
North Anna ANS Design Report Rev. 2, Section 3.8 needs to
be updated
Corrective Action
Documents
CR1176911
ERO Availability not N+1 for all positions for the coverage
period July 18 through July 31, 2021
Corrective Action
Documents
CR1185395
Individual's ERO qualification was expired
Corrective Action
Documents
CR1185395
ERO Members qualification were expired in LMS on
11/09/2021
Procedures
TR-AA-TPG-2400
Emergency Response Organization Training Program Guide
Rev. 16
Self-Assessments
Augmentation Capability Assessments: ACA 11-29-21, 1-13-
2, 8-09-22, 1-04-23
Corrective Action
Documents
CR1187304
Hydroelectric Drill Critique Roll-up Items
Corrective Action
Documents
Resulting from
Inspection
CR1243999
Enhancement Observations offered by NRC Inspectors
during the NRC EP Baseline Inspection
Corrective Action
Documents
Resulting from
Inspection
CR1244009
Inconsistency identified within the EAL Tech Basis Document
Rev. 11
Corrective Action
Documents
Resulting from
Inspection
CR1244058
Potential Enhancement Observation offered by NRC
Inspectors during the NRC EP Baseline Inspection
Miscellaneous
NA-21-21-0
Screening & Evaluation for North Anna Emergency Plan,
Rev. 53
11/08/2022
Miscellaneous
NA-21-22-0
Screening & Evaluation for North Anna Emergency Plan,
11/08/2022
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Rev. 53
Miscellaneous
NA-21-23-0
Screening & Evaluation for North Anna Power Station
Emergency Plan, Rev. 53
11/07/2022
Miscellaneous
NA-22-12-0
50.54(q) Screening & Evaluation for EPIP-1.06, Rev. 16
04/04/2022
Miscellaneous
NA-23-03-0
50.54(q) Screening & Evaluation for EPIP-4.03, Rev. 25 to
03/22/2023
Procedures
Emergency Action Level Technical Bases Document
Rev. 11
Procedures
Emergency Action Level Matrix
Rev. 10
Procedures
North Anna Power Station (NAPS) Emergency Plan
Rev. 52
Procedures
North Anna Power Station (NAPS) Emergency Plan
Rev. 53
Procedures
EPIP-1.02
Response to Notification of Unusual Event
Rev. 17
Procedures
EPIP-1.03
Response to Alert
Rev. 23
Procedures
EPIP-1.04
Response to Site Area Emergency
Rev. 25
Procedures
EPIP-1.05
Response to General Emergency
Rev. 27
Procedures
EPIP-1.06
Protective Action Recommendations
Rev. 16
Procedures
EPIP-2.01
Notifications and Communications
Rev. 43
Procedures
EPIP-4.03
Dose Assessment Team Controlling Procedure
Rev. 26
71151
Corrective Action
Documents
CR1203037
Early Warning System (EWS) Siren 10 failed to respond to
scheduled testing as expected
71151
Procedures
Emergency Preparedness Performance Indicators
Rev. 11