IR 05000338/2023002

Integrated Inspection Report 05000338/2023002 and 05000339/2023002

ML23220A151
Person / Time
Site:	North Anna
Issue date:	08/09/2023
From:	Matthew Fannon Division Reactor Projects II
To:	Carr E Dominion Energy Co
References
IR 2023002
Download: ML23220A151 (1)

Text

August 9, 2023

SUBJECT:

NORTH ANNA POWER STATION, UNITS 1 AND 2 - INTEGRATED INSPECTION REPORT 05000338/2023002 AND 05000339/2023002

Dear Eric S. Carr:

On June 30, 2023, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at North Anna Power Station, Units 1 and 2. On August 3, 2023, the NRC inspectors discussed the results of this inspection with James Jenkins, Plant Manager, 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 Fannon, Matthew on 08/09/23 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: 05000338/2023002 and 05000339/2023002 Enterprise Identifier: I-2023-002-0020 Licensee: Dominion Energy Facility: North Anna Power Station Location: Mineral, VA Inspection Dates: April 1, 2023 to June 30, 2023 Inspectors: K. Carrington, Senior Resident Inspector D. Turpin, Resident Inspector M. Riley, Senior Project Engineer A. Wilson, Senior Project Engineer Approved By: Matthew S. Fannon, Chief Reactor Projects Branch 4 Division of Reactor Projects Enclosure

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

Type Issue Number Title Report Section Status LER 05000338/2022-001-01 LER 2022-001-01 for North 71153 Closed Anna Power Station Unit 1,

Automatic Reactor Trip During Control Rod Operability Testing LER 05000338/2022-001-00 LER 2022-001-00 for North 71153 Closed Anna Power Station Unit 1,

Automatic Reactor Trip During Control Rod Operability Testing

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.

71111.01 - Adverse Weather Protection

Seasonal Extreme Weather Sample (IP Section 03.01) (1 Sample)

(1) The inspectors evaluated readiness for seasonal extreme weather conditions prior to the onset of seasonal hot temperatures for the following systems:

Both units' emergency diesel generator systems and shared station blackout diesel generator system, on June 29, 2023.

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 during a Pennsylvania-New Jersey-Maryland Interconnection hot weather alert on June 2, 2023.

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 2 'A' and 'B' quench spray systems following 'A' quench spray system testing, on April 10, 2023

(2) Unit 1 and Unit 2 'A' pump room exhaust air cleanup system (PREACS) during 'B' PREACS system planned maintenance, on April 27, 2023

(3) Unit 2 'A' low head safety injection (LHSI) system following 'B' LHSI system planned testing, on May 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 13, auxiliary service water pumphouse, on April 13, 2023

(2) Fire Area 4-1, Unit 1, cable tray spreading room, on April 25, 2023

(3) Fire Area 4-2, Unit 2, cable tray spreading room, on April 25, 2023

(4) Fire Area 14B-1, Unit 1, motor-driven auxiliary feedwater (AFW) pump room, on May 23, 2023

Fire Brigade Drill Performance Sample (IP Section 03.02) (1 Sample)

(1) The inspectors evaluated the onsite fire brigade training and performance during an offsite training evolution on May 11, 2023.

71111.06 - Flood Protection Measures

Flooding Sample (IP Section 03.01) (1 Sample)

(1) The inspectors evaluated external flooding mitigation protections in Manhole 1-BLD- MBAR-04MH03, on May 1, 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 Unit 1 'A' and 'C' main feedwater pump swaps on May 2, 2023, and Unit 2 control rod operability testing on June 22, 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 April 4, 2023.

71111.12 - Maintenance Effectiveness

Maintenance Effectiveness (IP Section 03.01) (2 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) Shared station blackout (alternate AC) diesel generator system

(2) Shared primary grade water system

Quality Control (IP Section 03.02) (1 Sample)

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

(1) New fuel receipt inspections associated with Work Order (WO) 59203400060 on June 13, 2023

71111.13 - Maintenance Risk Assessments and Emergent Work Control

Risk Assessment and Management Sample (IP Section 03.01) (5 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 risk during emergent troubleshooting of 1-I direct current (DC)battery charger ground, transfer of 4160-volt emergency buses to alternate supplies during "C" reserve station service transformer (RSST) cooling circuit troubleshooting, and troubleshooting of Unit 1 casing cooling tank level transmitter 1-RS-LT103B, week of April 17, 2023

(2) Unit 1 increased risk during "A" main feedwater pump motor lift, on April 21, 2023

(3) Unit 1 increased risk during Unit 1 AMSAC logic test, train "A" relay surveillance, and emergent troubleshooting of high vibrations on 1-HV-AC-2 air handling unit, week of May 12, 2023

(4) Unit 1 and 2 increased risk during emergent troubleshooting of the shared instrument and station air systems, on May 17, 2023

(5) Unit 1 increased risk associated with draining of the condensate storage tank and warehouse 5 fire protection piping rupture, week of May 23, 2023

71111.15 - Operability Determinations and Functionality Assessments

Operability Determination or Functionality Assessment (IP Section 03.01) (6 Samples)

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

(1) Condition Report (CR) 1224687, "2-CH-P-1B Speed Increaser Oil Pressure Low," on April 17, 2023

(2) CR1221151, "B Phase Directional Over Current Relay Failed As-Found Testing," and CR1224878, "'C' Reserve Station Service Transformer Trouble Alarm Due to Loss of Cooling Circuit," on April 19, 2023

(3) CR1221083, "Broken Air Line on 2-HV-PCV-2235A-2," on April 24, 2023

(4) CR1229720, "1-FW-P-2 Governor Oil Gauge Solid during Performance of 1-PT-71.1Q," on May 30, 2023

(5) CR1220358, "Pump Curve Data Plotted during 2-PT-74.2b.2 Fell Directly on the Acceptable and Alert Range Line," on June 16, 2023

(6) CR1222330, "SBO Diesel Trouble Alarm PLC Failure, following retraction of entry into Technical Specifications 3.8.1., Conditions C and F, on June 23, 2023

71111.18 - Plant Modifications

Temporary Modifications and/or Permanent Modifications (IP Section 03.01 and/or 03.02)

(1 Sample)

The inspectors evaluated the following temporary or permanent modifications:

(1) Design Change NA-23-00019, Directional Overcurrent Relay Associated with Breaker 15H1, on April 3, 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)

(1) PMT of Unit 1 emergency diesel generator (EDG) fuel transfer pump 1HA following discharge relief valve replacement, on April 11, 2023

(2) PMT of Unit 2 charging pump "B" following planned maintenance, on April 16, 2023

(3) PMT of Unit 2 "J" EDG air dryer "A" following planned maintenance, on May 11, 2023

(4) PMT of Unit 1 main control room chiller "A" following planned maintenance, on June 2, 2023

(5) WO 59203130743 associated with PMT of Unit 2 service water motor-operated valve, 1-SW-MOV-123B, following actuator maintenance, on June 20, 2023

(6) PMT of Unit 1 component cooling heat exchanger A, following inspection, cleaning, and reassembly, on June 21, 2023

(7) WO 59203400324 associated with PMT of Unit 2 service water motor-operated valve, 2-SW-MOV-208B, following actuator maintenance, on June 29, 2023

(8) WO 59203130744 associated with PMT of Unit 2 service water motor-operated valve, 2-SW-MOV-221A, following actuator maintenance, on June 27, 2023

Surveillance Testing (IP Section 03.01) (4 Samples)

(1) OTO1, 1-PT-82.4A,1H EDG Fast Start, on April 12, 2023

(2) 2-PT-71.3Q, 2-FW-P-3B, Motor-driven AFW Pump, and Valve Test, on April 19, 2023

(3) 0-PT-77.15B, Emergency Core Cooling System (ECCS) PREACS Flow Test- Train "B" Filter, on June 16, 2023

(4) 2-PT-17.1, Control Rod Operability, on June 22, 2023

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

(1) 2-PT-71.1Q, Turbine Driven Auxiliary Feedwater Pump and Valve Test, on June 20, 2023

71114.06 - Drill Evaluation

Drill/Training Evolution Observation (IP Section 03.02) (1 Sample)

The inspectors evaluated:

(1) The inspectors observed emergency preparedness drill "NAPR23FS" with simulator, operations support center, and technical support center participation, on April 4,

OTHER ACTIVITIES - BASELINE

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

MS07: High Pressure Injection Systems (IP Section 02.06) ===

(1) Unit 1 (April 1, 2022, through March 31, 2023)

(2) Unit 2 (April 1, 2022, through March 31, 2023)

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

(1) Unit 1 (April 1, 2022, through March 31, 2023)

(2) Unit 2 (April 1, 2022, through March 31, 2023)

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) CR1226886, Missed Programmatic As-Found Test on 1-CH-MOV-1275C, on May 3, 2023

(2) CR1209779, Containment Upender Did Not Raise Fuel Basket as Expected, on June 16, 2023

71153 - Follow Up of Events and Notices of Enforcement Discretion Event Report (IP section 03.02)

The inspectors evaluated the following licensee event reports (LERs):

(1) LER 050000338/2022-001-00; 2022-001-01, North Anna Power Station Unit 1, Automatic Reactor Trip During Control Rod Operability Testing] (ADAMS Accession No. ML22178A007; ML22270A020):

The inspectors determined that it was not reasonable to foresee or correct the cause associated with the LERs, therefore no performance deficiency was identified. The inspectors did not identify a violation of NRC requirements. Both LERs are closed.

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 3, 2023, the inspectors presented the integrated inspection results to James Jenkins, Plant Manager, and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.01 Corrective Action CR1063707,

Documents CR1119639,

CR1205059

Procedures 0-GOP-4.1 Hot Weather Operations 46

Work Orders WO 59203289024 04/01/2019

71111.05 Corrective Action CR1226273 NRC Identified: U1/U2 Cable Spreading Room Door (1- 04/27/2023

Documents BLD-STR-S94-1) Strip is Missing 5 Screws

Resulting from CR1226275 NRC Identified: Transient Fire Loading Report in U1 Cable 04/27/2023

Inspection Spreading Room Questioned

CR1226283 NRC Identified: Conduit Cover Missing on 1CC960NE6 04/28/2023

(Conduit for U1 Cable Spreading Heat Detectors)

CR1226286 NRC Identified: 2-EP-INV-02 (PCS Inverter) Shows a 04/28/2023

Current Imbalance on 3 Phases

71111.06 Work Orders 59203397198 Inspect and Pump 01-BLD-MBAR-4MH03 (Quarterly) 05/01/2023

71111.11Q Procedures 2-PT-17.1 Control Rod Operability 06/22/2023

71111.12 Corrective Action CA11455419 0-BCW-F-1B-Motor (Radiator Fan 1B], Motor Tripped 04/29/2023

Documents

Work Orders WO592003400060 06/13/2023

71111.13 Corrective Action CR1228620 05/16/2023

Documents

71111.15 Corrective Action CR1221083,

Documents CR1180880,

CR1221151,

CR1224687,

CR1224878,

CR1224878,

CR1229720

Drawings 11715-FE-21Z

D.C. Elementary Diagram, 4160V Bus 1B BKR 15B11 & Revision 23

Bus 1H BKR 15H1, North Anna Power Station- Unit 1

Engineering ETE-NA-2013- Unit 1 and Unit 2 Charging Pump Speed Increaser Lube Oil Revision 0

Evaluations 0027 Bearing and Spray Pressure Specifications

71111.24 Corrective Action CR1228219, 05/12/2023

Inspection Type Designation Description or Title Revision or

Procedure Date

Documents CR1229816

Procedures 0-MCM-0801-01 Cleaning and Plugging of Component Cooling Heat 33

Exchanger Tubes

Work Orders WO 59203130744,

203137413,

203137416,

203300206,

203400324,

203130743

71114.06 Corrective Action CR1223245 04/04/2023

Documents

71152A Corrective Action CA11298891,

Documents CA11373481,

CR1209834,

CR12209779

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