IR 05000338/2025010
| ML25246C352 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 09/04/2025 |
| From: | Marcus Riley NRC/RGN-II/DORS |
| To: | Carr E Dominion Energy Corp |
| References | |
| IR 2025010 | |
| Download: ML25246C352 (0) | |
Text
SUBJECT:
NORTH ANNA POWER STATION, UNITS 1 AND 2 - NRC INSPECTION REPORT 05000338/2025010 AND 05000339/2025010
Dear Eric Carr:
On August 12, 2025, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at North Anna Power Station, Units 1 and 2 and discussed the results of this inspection with Jim Jenkins 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, Marcus A. Riley, Chief Engineering Branch 1 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:
05000338/2025010 and 05000339/2025010
Enterprise Identifier:
I-2025-010-0033
Licensee:
Dominion Energy Corporation
Facility:
North Anna Power Station, Units 1 and 2
Location:
Mineral, VA
Inspection Dates:
July 14, 2025 to August 12, 2025
Inspectors:
J. Alamudun, Reactor Inspector
P. Braxton, Reactor Inspector
D. Burgess, Reactor Inspector
C. Franklin, Reactor Inspector
L. Jones, Senior Reactor Inspector
J. Lizardi-Barreto, Reactor Inspector
Approved By:
Marcus A. Riley, Chief
Engineering Branch 1
Division of Operating Reactor Safety
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting a NRC 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.
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 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
===71111.21M - Comprehensive Engineering Team Inspection The inspectors evaluated the following components and listed applicable attributes, permanent modifications, and operating experience:
Structures, Systems, and Components (SSCs) (IP section 03.01)===
For each component sample, the inspectors reviewed the licensing and design bases including:
- (1) the Updated Final Safety Analysis Report (UFSAR);
- (2) the Technical Specifications (TS); and
- (3) the Technical Requirements Manual (TRM). The inspectors reviewed a sample of operating procedures (including normal, abnormal, and emergency procedures) and overall system/component health (including condition reports and operability evaluations, if any). The inspectors performed visual inspections of the accessible components to identify potential hazards and/or signs of degradation. Additional component specific design attributes reviewed by the inspectors are listed below.
- (1) Service Water Pump House Ventilation & Damper
- Environmental Qualification
- Design calculations and considerations:
o Design system flowrates o
Pumphouse ventilation heat loads o
Fan motor minimum voltage o
Fan motor cable ampacity o
Control logic o
Control circuit voltage o
Heat transfer capacity
- Test/inspection procedures, acceptance criteria, and recent results:
o Fan motor inspection and replacement o
Damper inspection and replacement
- (2) U2 Battery Chargers
- Calculations verifying system design requirements
- Design Basis documents/Design requirements
- Conformance with manufacturer instruction for installation, maintenance, and operation
- (3) U1 1B Station Service Transformer
- Reviewed system design documents for design prosperity
- Conformance with manufacturer
- Reviewed system condition reports
- (4) Station Blackout Diesel (Alternate AC Diesel Generator)
1. Design Calculations and considerations:
a.
SBO Room heat load calculations b.
Battery system design c.
Fuel oil day tank flowrate d.
Pipe support qualification
2. Test/inspection procedures, acceptance criteria, and recent results:
a.
TRM Surveillances
3. Condition reports
- (5) U1 1-AC-6 Switchgear Air Handling Unit
- Design Basis documents/ Design requirements
- Design calculations and considerations o
Heat load calculations for chiller performance testing o
Cooling coils for air handling units
- Test/inspection procedures, acceptance criteria, and recent results o
Inspection and replacement of fan motor and sheaves o
Inspection of motor bearing, coil and damper filter
Modifications (IP section 03.02) (4 Samples)
- (1) NA-23-00038-U2 SST 2-EP-SST-1B 4160V Power Cable Replacement
- (2) NA-25-00015 - U2 Charging Pump Suction MOV (2-CHMOV-2270B) Control Circuits Modification
- (3) NA-22-00016 - U2 Low Head Safety Injection Pump Motor (2-SI-P-1A-MOTOR)
Replacement
- (4) NA-23-0007-01 & NA-23-00008-02 - Unit 1 and 2 Reactor Head Seismic Restraint Clevis Pin Replacement 10 CFR 50.59 Evaluations/Screening (IP section 03.03) (6 Samples)
- (1) NA-22-00075 - Safety Injection Gate Valve MOV Motor Replacements (1-SI-MOV-1869A/B & 2-SI-MOV-2869B)
- (2) NA-21-00074 - Upgrade of Service Water Temperature Indicator Controllers 1-SW-TIC-102A,B,C
- (3) NA-21-00066-02 - 1st Point Feedwater Heaters Level Controls Digital Upgrade-SLR
- (4) NA-18-00092 - 1H Emergency Diesel Generator Exhaust Gasket and Bolting Modifications
- (5) NA-23-00007 - Unit 1 Reactor Head Seismic Restraint Clevis Pin Replacement (6)02-SW-MEJ-23F-PIPE - Replace A Spray MEJ (Mechanical Expansion Joint) (ETE-NA-2021-0033 and WOs 59103104100 & 59203301006)
Operating Experience Samples (IP section 03.04) (2 Samples)
- (1) Information Notice 2019-01: Inadequate Evaluation of Temporary Alterations
- (2) Information Notice 2009-10: Transformer Failures-Recent Operating Experience
INSPECTION RESULTS
No findings were identified.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
- On August 12, 2025, the inspectors presented the NRC inspection results to Jim Jenkins and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
11715-7.1-V-6
Evaluation of the SWPH Ventilation System with Additional
Heat Loads
CE-1064
Pipe Support Qualification - SBO Diesel
CORRES-CEM-
SEISMIC-148
Seismic Response Spectra for the Reactor Head Seismic
Restraint Clevis Pin Replacement North Anna Units 1 & 2
EE-0008
North Anna Voltage Profiles
EE-0511
Station Blackout 125VDC Battery System Design
EE-0687
ME-0275
Heat Load Calculation for Chiller Performance Testing
ME-0323
SBO Diesel Generator Room Heat Load Calculation
ME-0410
SBO Diesel Day Tank Level Vs. Useable Fuel
ME-0529
SBO Diesel Fuel Oil Day Tank Flowrate Calculation
ME-0899
Loss of Forced Ventilation in the EDG Rooms and SBO
Building
ME-12139
Compensatory Measures Required for Loss of Service
Water Pump House Ventilation
ME-12207
Weak Link Analysis for the Charging Pump Suction MOVs at
North Anna Power Station
ME-3006
JOG Calculations of Required Thrust Settings and Margin
for the Charging Pump Suction MOVs
NA-CALC-PRO-
11715-7-V-22
Cooling Coils for Air Handling Units
NA-CALC-ZZZ-
CE-0195
Pipe Stress Analysis for Service Water Piping of the Valve
House
Calculations
NA-CALC-ZZZ-
CE-0196
Pipe Stress Analysis for Service Water Piping of the Valve
House
266021,
2800741,
2980257,
Corrective Action
Documents
OD CA 11207533
(CR 1202700)
Prompt Operability Determination
Corrective Action
CR 1297334
TRM 3.7.7 Bases Not Updated to Indicate Annual Surveys
7/30/2025
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Documents
Resulting from
Inspection
11715-ESK-6LE
Elementary Diagram 480V Circuits Heating and Ventilating
11715-FB-24D
Ventilation & Air Conditioning Service Building SH-4 North
Anna Power Station - Unit 1
11715-FB-44E
Flow Diagram Ventilation System
11715-FE-1A
Main One Line Diagram North Anna Power Station - Unite 1
& 2
11715-FE-21B
A.C. Elementary Diagram Station Service Transformer North
Anna Power Station - Unit 1
11715/12050-
5.14-20B
North Anna 1 & 2 Virginia Electric Power Co - CRDM
Seismic Support Tie Rod Assembly
2050-ESK-6EB
Elementary diagram 480V Circuits Motor Operated Valves
Sheet 50
Drawings
2050ESK-6EB-
Elementary diagram 480V Circuits Motor Operated Valves
Sheet 50-1
DC NA-18-00092
1H - Emergency Diesel Generator Exhaust Gasket and
Bolting Modifications
DC NA-21-00066
1st and 2nd Point Feedwater Heaters Level Controls Digital
Upgrade
DC NA-22-00016
2-SI-P-1A LHSI Pump Motor Replacement
DC NA-23-00007
Unit 1 Reactor Head Seismic Restraint Clevis Pin
Replacement
DC NA-23-00007
Unit 1 Reactor Head Seismic Restraint Clevis Pin
Replacement
DC NA-23-00008
Unit 2 Reactor Head Seismic Restraint Clevis Pin
Replacement
DC NA-25-00015
U2 Charging Pump Suction MOV (2-CH-MOV-2270B)
Control Circuit Modification
Engineering
Changes
NA-21-00074
Upgrade of Service Water Temperature Indicator Controllers
1-SW-TIC-102A,B,C
Engineering
Evaluations
50.59 Evaluation
for NA-21-00066
50.59 Evaluation for 1st and 2nd Point Feedwater Heaters
Level Controls Digital Upgrade
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
NA-22-00075
Safety Injection Gate Valve MOV Motor Replacements (1-
SI-MOV-1869A/B & 2-SI-MOV-2869B)
NA-23-00038
U2 Station Service Transformer B 4160V Power Cable
Replacement
NA-ETE-000-
ETE-NA-2020-
0015
Reduction in Site Settlement Survey Frequency
NA-ETE-000-
ETE-NA-2021-
0033
Response to Service Water Valve House Monument
Settlement Survey Issues
NA-REQUEST-
000-LBDCR-
TRCR-198
License Basis Document Change Request
WNA-QR-00107-
VRA
Dominion North Anna Unit 1 & 2 Feedwater Heater Level
Control EMC Compliance Evaluation Report
04-624 (DNV-LC
LC036678)
Summary of Dam Safety Inspection for the Service Water
Reservoir Dam at the North Anna Power Station
09/08/2004
ALAB-578
Decision ALAB-578 Advising that Settlement of SVC Water
Pumphouse Does Not Pose Threat to Health & Safety
2/11/1980
CT-SPEC-000-
676258
Motor Operated Valves Specification
DNES-AA-MOV-
1001
Motor-Operated Valve Diagnostic Test Preparation and
Evaluation
NAS-0264
Specification for Ventilation and Air Conditioning Systems
05/31/1979
Miscellaneous
NAS-307
Specification for Propeller Fans
06/22/1977
1-PT-110
Service Water Reservoir Spray Piping Settlement Monitoring
01/25/1978
NDE Reports
NA-PROC59-000-
0-PT-115
Survey of Settlement Monitoring Points
0-PT-82.12
Quarterly Test of 0-AAC-DC-OM
0-WP-M-SW001
SW Reservoir Spray Array Piping and Mechanical
Expansion Joint Replacement
1-MOP-21.39
Service Water Pump House Exhaust Fan 1-HV-F-49A/B
Procedures
CFR 50.59 and 10 CFR 72.48 - Changes, Tests, and
Experiments
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
ER-AA-NDE-VT-
603
VT-# Visual Examination Procedure
59102266150,
203454236,
203305312
59103104100
09/22/2021
203301006
Inspect, repair, or replace "A" SW spray MEJ
07/25/2025
203307959
Replace Fan and Motor Sheaves
203402997
Seismic Restraint Clevis Pin Replacement DC NA-23-00007
07/02/2024
203405412
Grease Motor Bearings
203454829
Control Room Filter/Damper Inspection
203454829
Work Orders
2-FW-E-1A FEEDWATER HEATER INSTRUMENT
CALIBRATION
4/1/2025