IR 05000369/2021001

Integrated Inspection Report 05000369/2021001 and 05000370/2021001

ML21120A170
Person / Time
Site:	Mcguire, McGuire
Issue date:	04/30/2021
From:	Eric Stamm Division Reactor Projects II
To:	Teresa Ray Duke Energy Carolinas
References
IR 2021001
Download: ML21120A170 (11)

Text

April 30, 2021

SUBJECT:

MCGUIRE NUCLEAR STATION - INTEGRATED INSPECTION REPORT 05000369/2021001 AND 05000370/2021001

Dear Mr. Ray:

On March 31, 2021, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at McGuire Nuclear Station. On April 28, 2021, the NRC inspectors discussed the results of this inspection with you 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,

/RA/

Eric J. Stamm, Chief Reactor Projects Br #1 Division of Reactor Projects Docket Nos. 05000369 and 05000370 License Nos. NPF-9 and NPF-17

Enclosure:

As stated

Inspection Report

Docket Numbers: 05000369 and 05000370 License Numbers: NPF-9 and NPF-17 Report Numbers: 05000369/2021001 and 05000370/2021001 Enterprise Identifier: I-2021-001-0070 Licensee: Duke Energy Carolinas, LLC Facility: McGuire Nuclear Station Location: Huntersville, North Carolina Inspection Dates: January 01, 2021 to March 31, 2021 Inspectors: A. Hutto, Senior Resident Inspector R. Cureton, Resident Inspector Approved By: Eric J. Stamm, Chief Reactor Projects Br #1 Division of Reactor Projects Enclosure

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at McGuire Nuclear 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 100 percent rated thermal power (RTP) for the entire inspection period.

Unit 2 began the inspection period at or near 100 percent RTP. On February 21, 2021, power was reduced to approximately 15 percent RTP and the unit taken off-line for gland seal exhauster repairs. Repairs were completed, and on February 26, 2021, the unit was returned to 100 percent RTP for the remainder of the 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 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.

Starting on March 20, 2020, in response to the National Emergency declared by the President of the United States on the public health risks of the Coronavirus Disease 2019 (COVID-19), resident inspectors were directed to begin telework and to remotely access licensee information using available technology. During this time, the resident inspectors performed periodic site visits each week; conducted plant status activities as described in IMC 2515, Appendix D, Plant Status; observed risk-significant activities; and completed on-site portions of IPs. In addition, resident and regional baseline inspections were evaluated to determine if all or portions of the objectives and requirements stated in the IP could be performed remotely. If the inspections could be performed remotely, they were conducted per the applicable IP. In some cases, portions of an IP were completed remotely and on-site. The inspections documented below met the objectives and requirements for completion of the IP.

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 "B" train of high head injection (NV), on January 7, 2021

(2) Unit 2 "A" train of auxiliary feedwater (CA), on March 11, 2021

(3) Unit 1 "B" train of component cooling water (KC), on March 17, 2021

71111.05 - Fire Protection

Fire Area Walkdown and Inspection Sample (IP Section 03.01) (5 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) Unit 1 motor generator set and rod control room, on January 14, 2021

(2) Unit 2 motor generator set and rod control room, on January 14, 2021

(3) Unit 1 6.9 KV switchgear room, on March 29, 2021

(4) Unit 2 6.9 KV switchgear room, on March 29, 2021

(5) Auxiliary building 767' elevation (fire area 25), on March 29, 2021

71111.06 - Flood Protection Measures

Inspection Activities - Internal Flooding (IP Section 03.01) (1 Sample)

The inspectors evaluated internal flooding mitigation protections in the:

(1) Unit 1 and 2 turbine building auxiliary building interface, on February 9, 2021

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 control room during Unit 1 and 2 dilution activities (reactivity manipulations), on February 14, 2021; and Unit 2 power increase, on February 25, 2021.

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

(1) The inspectors observed and evaluated cold crew simulator exams on March 3, 2021. The scenario included an intermediate nuclear instrument malfunction, followed by a pressurizer power operated relief valve malfunction and pressure transient. The scenario concluded with a loss of heat sink accident.

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) Nuclear Condition Report (NCR) 02351861, 2NC-56B failed valve stroke timing

(2) NCR 02337921, ESPS Gen 1 main breaker charging spring fail to charge

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) 1NI-60 cold leg accumulator check valve leakage, on February 12, 2021

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) Equipment protection plan for Unit 1 spent fuel pool temperature time to 200 degrees less than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, on January 12, 2021

(2) Equipment protection plan for 1A diesel generator 12 month maintenance activities, on January 25, 2021

(3) Risk management activities for emergent standby shutdown diesel governor repairs, on January 31, 2021

(4) Equipment protection plan for 2B diesel generator preventive maintenance activities, on March 2, 2021

(5) Equipment protection plan for 1A high head safety injection pump preventive maintenance activities, on March 15, 2021

71111.15 - Operability Determinations and Functionality Assessments

Operability Determination or Functionality Assessment (IP Section 03.01) (5 Samples)

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

(1) NCR 2363412, 1NMV0078B cold leg accumulator sample containment inside isolation closes when open, on January 6, 2021

(2) NCR 2364424, Loop 2D flow channel 1 (2NCLP5090) reads low when containment cooler fan speed changed, on January 11, 2021

(3) NCR 2291366, MAGNASTOR charpy testing during fabrication, on January 20, 2021

(4) NCR 2367153, Technical Bulletin TB 21-01, "Increased Cold Leg Streaming Temperature Bias," on January 28, 2021

(5) NCR 2367852, 2C reactor coolant loop wide range Thot reading greater than 10 degrees above average Thot, on February 17, 2021

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) Engineering Change (EC) 415764 Replace Dresser Relief Valve 1NI-0119 Equivalent Change

71111.19 - Post-Maintenance Testing

Post-Maintenance Test Sample (IP Section 03.01) (6 Samples)

The inspectors evaluated the following post-maintenance test activities to verify system operability and functionality:

(1) PT/1/A/4350/002 B, "Diesel Generator 1B Operability Test," following scheduled maintenance, on January 5, 2021

(2) PT/1/A/4350/002 A, "Diesel Generator 1A Operability Test," following 12 year maintenance, on January 28, 2021

(3) PT/2/A/4252/001 B, "2B CA (Auxiliary Feedwater) Pump Performance Test," following pump preventive maintenance, on February 4, 2021

(4) PT/0/A/4200/002, "Standby Shutdown Facility Operability Test," following preventative maintenance, on February 23, 2021

(5) PT/2/A/4350/002 B, "Diesel Generator Operability Test," following governor preventative maintenance, on March 4, 2021

(6) PT/1/A/4209/001 A, "1A NV Pump Performance Test," following pump preventative maintenance, on March 15, 2021

71111.22 - Surveillance Testing

The inspectors evaluated the following surveillance tests:

Surveillance Tests (other) (IP Section 03.01)

(1) PT/2/A/4350/002 A, "2A Diesel Generator Operability Test," on January 19, 2021

(2) PT/1/A/4450/003 A, "Annulus Ventilation System Train A System Operability Test," on February 23, 2021

(3) PT/1/A/4600/003 A, "Semi-Daily Surveillance Items," on March 25, 2021

(4) PT/0/A/4200/002, "Standby Shutdown Facility Operability Test," on March 25, 2021

Inservice Testing (IP Section 03.01) (1 Sample)

(1) PT/2/A/4252/001, "#2 TD CA Pump Performance Test," on January 26, 2021

71114.06 - Drill Evaluation

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

(1) The inspectors evaluated the emergency preparedness drill conducted on February 17, 2021. The drill involved a loss of the refueling water storage tank due to wind damage, followed by a feedwater isolation and subsequent loss of heat sink.

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 03.01) ===

(1) Unit 1 (January 1, 2020 - December 31, 2020)

(2) Unit 2 (January 1, 2020 - December 31, 2020)

IE03: Unplanned Power Changes per 7000 Critical Hours Sample (IP Section 03.02) (2 Samples)

(1) Unit 1 (January 1, 2020 - December 31, 2020)

(2) Unit 2 (January 1, 2020 - December 31, 2020)

IE04: Unplanned Scrams with Complications (USwC) Sample (IP Section 03.03) (2 Samples)

(1) Unit 1 (January 1, 2020 - December 31, 2020)

(2) Unit 2 (January 1, 2020 - December 31, 2020)

71152 - Problem Identification and Resolution

Annual Follow-up of Selected Issues (IP Section 02.03) (1 Sample)

The inspectors reviewed the licensees implementation of its corrective action program related to the following issues:

(1) NCR 2375165, 1A Containment Ventilation (VL) discharge duct patch failure

INSPECTION RESULTS

No findings were identified.

EXIT MEETINGS AND DEBRIEFS

The inspectors verified no proprietary information was retained or documented in this report.

• On April 28, 2021, the inspectors presented the integrated inspection results to Tom Ray and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.04 Drawings MCFD-1573- Unit 1 Flow Diagram of the Component Cooling Water

01.00 System

71111.04 Drawings MCFD-2554- Unit 2 Flow Diagram of the Chemical Volume and Control

03.01 System

71111.04 Drawings MCFD-2562- Unit 2 Flow Diagram of the Safety Injection System

01.00

71111.04 Drawings MCFD-2592- Unit 2 Flow Diagram of the Auxiliary Feedwater System

01.01

71111.05 Fire Plans CSD-MNS-PFP- Pre-Fire Plan Unit 1 Turbine Building Level 760

TB1-0760-001

71111.05 Fire Plans CSD-MNS-PFP- Pre-Fire Plan Unit 2 Turbine Building Level 760

TB2-0760-001

71111.05 Fire Plans MFSD-022 Unit 1 Motor Generator Set Room

71111.05 Fire Plans MSFD-023 Unit 2 Motor Generator Set Room

71111.05 Fire Plans MSFD-025 Auxiliary Building Elevation 767'

71111.05 Procedures AD-EG-ALL-1520 Transient Combustible Control

71111.06 Procedures AP/0/A/5500/044 Plant Flooding

71111.11Q Miscellaneous OP-MC-Cold McGuire Operation Training Cold Crew Exam #1

Crew Exam-01

71111.11Q Procedures AD-OP-ALL-1000 Conduct of Operations

71111.12 Miscellaneous Duke Equipment Reliability Maintenance Rule Database

71111.12 Procedures AD-EG-ALL-1204 Single Point Vulnerability Identification, Elimination and

Mitigation

71111.12 Procedures AD-EG-ALL-1206 Equipment Reliability Classification

71111.12 Procedures AD-EG-ALL-1209 System, Component, and Program Health Reports and

Notebooks

71111.12 Procedures AD-EG-ALL-1210 Maintenance Rule Program

71111.12 Procedures AD-EG-ALL-1211 System Performance Monitoring and Trending

71111.13 Procedures AD-OP-ALL-0204 Plant Status Control

71111.13 Procedures AD-WC-ALL-0204 On-line Risk Management Process

71111.15 Procedures AD-EG-ALL-1211 System Performance Monitoring and Trending

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.15 Procedures AD-OP-ALL-0102 Operability Decision Making

71111.15 Procedures AD-OP-ALL-0105 Operability Determinations and Functionality Assessment

71111.18 Engineering EC 415764 Replace Dresser Relief Valve 1NI-0119 Equivalent Change

Changes

71111.19 Procedures AD-EG-ALL-1155 Post Modification Testing

71111.22 Procedures AD-EG-ALL-1202 Preventive Maintenance and Surveillance Testing

Administration

71111.22 Procedures AD-EG-ALL-1720 In-service Testing (IST) Program Implementation

71111.22 Procedures AD-WC-ALL-0250 Work Implementation and Completion

71111.22 Procedures AD-LS-ALL-0004 NRC Performance Indicators and Monthly Operating Report

71151 Procedures AD-LS-ALL-0006 Notification/Reportability Evaluation

71152 Procedures AD-PI-ALL-0100 Corrective Action Program

71152 Procedures AD-PI-ALL-0105 Effectiveness Reviews

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