Text

Integrated Inspection Report 05000338/2023001 and 05000339/2023001
	ML23118A017
Person / Time
Site:	North Anna
Issue date:	05/02/2023
From:	Matthew Fannon; Division Reactor Projects II
To:	Stoddard D; Dominion Energy Co
References
	IR 2023001
	Download: ML23118A017 (12)
	v • d • e

SUBJECT:

NORTH ANNA POWER STATION - INTEGRATED INSPECTION REPORT 05000338/2023001 AND 05000339/2023001

Dear Daniel Stoddard:

On March 31, 2023, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at North Anna Power Station. On April 20, 2023, 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 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:

NPF-4 and NPF-7

Report Numbers:

05000338/2023001 and 05000339/2023001

Enterprise Identifier:

I-2023-001-0026

Licensee:

Dominion Energy (Virginia Electric Company)

Facility:

North Anna Power Station

Location:

Mineral, VA

Inspection Dates:

January 1, 2023 to March 31, 2023

Inspectors:

K. Carrington, Senior Resident Inspector

D. Turpin, Resident Inspector

A. Wilson, Senior Project Engineer

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, 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 for the entire inspection period.

Unit 2 operated at or near rated thermal power 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

71111.04 - Equipment Alignment

Partial Walkdown Sample (IP Section 03.01) (3 Samples)

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

(1) Unit 1 auxiliary service water pump following planned maintenance, on January 12, 2023

(2) Unit 1 "B" main control room chiller (1-HV-E-4B) system during planned maintenance, on January 13, 2023

(3) Unit 1 "A" low head safety injection (LHSI) system during "B" LHSI system planned maintenance, on February 22, 2023

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:

(1) Fire Area 7C-1, Unit 1, 1-III battery room, on January 24, 2023

(2) Fire Area 8, Unit 1 turbine building (mechanical equipment room), on January 26, 2023

(3) Fire Zone 6-1, Unit 1 emergency switchgear instrument rack and air conditioning rooms, on February 23, 2023

(4) Fire Area 6-2, Unit 2 emergency switchgear instrument rack and air conditioning rooms, on February 23, 2023

71111.06 - Flood Protection Measures

Flooding Sample (IP Section 03.01) (1 Sample)

(1) The inspectors evaluated internal flooding mitigation protections in the Unit 1 cable spreading room.

71111.07A - Heat Exchanger/Sink Performance

Annual Review (IP Section 03.01) (1 Sample)

The inspectors evaluated readiness and performance of:

(1) Unit 1 "A" spent fuel pit cooling system heat exchanger, 1-FC-E-1A, on January 31, 2023

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 Sample)

(1) The inspectors observed and evaluated licensed operator performance in the main control room during the Unit 1 "J" emergency diesel generator (EDG) trip, on January 25, 2023, and during the Unit 2 "A" low pressure heater drain pump trip, on March 13, 2023.

Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)

(1) The inspectors observed and evaluated licensed operator requalification training in the control room simulator, on March 7, 2023.

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 remain capable of performing their intended function:

(1) Unit 1 and Unit 2 auxiliary feedwater system (AFW)

71111.13 - Maintenance Risk Assessments and Emergent Work Control

Risk Assessment and Management Sample (IP Section 03.01) (6 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 and 2 elevated risk associated with planned maintenance and testing on the Unit 2 "J" EDG system, Unit 2 control room heating and ventilation system, Unit 2 train "B" slave relay system, Unit 1 "A" boric acid transfer pump system, and the common "1A" fuel pit cooling system, the week of January 16, 2023

(2) Unit 1 elevated risk associated with channel III protection system testing and emergent troubleshooting of the Unit 1 ultrasonic flowmeter, on January 23, 2023

(3) Unit 1 elevated risk associated with planned maintenance and testing on the I-I battery charger system, Unit 1 "A" charging pump system, Unit 1 "A" spent fuel pit cooling heat exchanger system, and the common station blackout diesel system, the week of January 30, 2023

(4) Unit 1 elevated risk associated with emergent maintenance on the Unit 1 "J" EDG due to high lube oil temperature trip during testing, on January 26, 2023

(5) Units 1 and 2 yellow risk during primary grade system planned maintenance, the week of March 7, 2023

(6) Unit 1 and Unit 2 elevated risk associated with planned maintenance on the Unit 1 "J" EDG system, Unit 2 main feed pump swap, and emergent maintenance on the common station blackout diesel system due to programmable logic controller issues, the week of March 27, 2023

71111.15 - Operability Determinations and Functionality Assessments

Operability Determination or Functionality Assessment (IP Section 03.01) (2 Samples)

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

(1) Operability Determination Correction Action (CA) 8587871, "Charging Pump Suction MOVs (Motor-operated Valves) Removed from JOG (Joint Owners Group) Program with Insufficient Basis, Revision 3," on January 6, 2023

(2) Condition Report (CR) 1221151, "'B' Phase Directional Over Current Relay Failed As-found Testing," on March 9, 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) (3 Samples)

(1)1-OP-6.9, "Slow Start and Operation of 1J Diesel Generator," following Unit 1 "J" EDG trip on lube oil high temperature, on January 26, 2023 (2)1-PT-82.2B, "1J Diesel Generator Test (Simulated Loss of Off-site Power)," following Unit 1 "J" EDG 3-and 6-year preventive maintenance outage, on March 23, 2023 (3)1-PT-87.4J OTO1 (One-Time Only), "Station Battery Charger 1-IV Service Testing,"

following planned maintenance, on March 31, 2023

Surveillance Testing (IP Section 03.01) (5 Samples)

(1)2-PT-82.4A, "2H Diesel Generator Test (Start by ESF (Engineered Safety Feature)

Actuation)," on January 4, 2023 (2)2-PT-14.1, "U2 Charging Pump 1A Quarterly Test," on January 9, 2023 (3)1-PT-82.9H, "1H Diesel Generator Test (Local Operation)," on January 12, 2023 (4)1-PT-71.3Q, "1-FW-P-3B, 'B' Motor-Driven AFW Pump and Valve Test," on January 31, 2023 (5)2-PT-57.1B, "Emergency Core Cooling Subsystem - Low Head Safety Injection Pump (2-SI-P-1B)," on February 16, 2023

Inservice Testing (IST) (IP Section 03.01) (1 Sample)

(1)2-PT-71.3Q.1, "2-FW-P-3B, Motor-Driven AFW IST (Inservice Test) Comprehensive Pump and Valve Test," on January 17, 2023

71114.06 - Drill Evaluation

Select Emergency Preparedness Drills and/or Training for Observation (IP Section 03.01) (1 Sample)

(1) The inspectors observed emergency preparedness drill "NJan23EPD" with simulator, operations support center, and technical support center participation, on January 10,

OTHER ACTIVITIES - BASELINE

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

IE01: Unplanned Scrams per 7000 Critical Hours Sample (IP Section 02.01)===

Main article: IP 71151

(1) Unit 1 (January 1, 2022 through December 31, 2022)