IR 05000369/2022001
| ML22109A172 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 04/23/2022 |
| From: | Eric Stamm NRC/RGN-II/DRP/RPB1 |
| To: | Pigott E Duke Energy Carolinas |
| Matthew R | |
| References | |
| IR 2022001 | |
| Download: ML22109A172 (11) | |
Text
April 20, 2022
SUBJECT:
MCGUIRE NUCLEAR STATION - INTEGRATED INSPECTION REPORT 05000369/2022001 AND 05000370/2022001
Dear Mr. Pigott:
On March 31, 2022, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at McGuire Nuclear Station. On April 18, 2022, 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, Eric J. Stamm, Chief Reactor Projects Branch #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:
Report Numbers:
05000369/2022001 and 05000370/2022001
Enterprise Identifier:
I-2022-001-0023
Licensee:
Duke Energy Carolinas, LLC
Facility:
McGuire Nuclear Station
Location:
Huntersville, North Carolina
Inspection Dates:
January 1, 2022 to March 31, 2022
Inspectors:
A. Hutto, Senior Resident Inspector
C. Scott, Resident Inspector
Approved By:
Eric J. Stamm, Chief
Reactor Projects Branch #1
Division of Reactor Projects
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
Type Issue Number Title Report Section Status LER 05000370/2021-001-00 LER 2021-001-00 for McGuire Nuclear Station,
Unit 2, Valid Actuations of the Unit 2 B Train Emergency AC Power System and B Train Auxiliary Feedwater System 71153 Closed
PLANT STATUS
Unit 1 began the inspection period at or near 100 percent rated thermal power (RTP). On March 7, 2022, the unit began a power reduction coast down in advance of refueling outage M1R28. Unit 1 was at 91 percent RTP at the end of the inspection period.
Unit 2 began the inspection period at or near 100 percent RTP. On February 18, 2022, the unit was manually tripped due to a malfunction of the turbine control system. After repairs, the unit was restarted on February 21, 2022, and returned to 100 percent RTP on February 23, 2022. Unit 2 remained at or near 100 percent RTP for the rest 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 performed activities described in IMC 2515, Appendix D, Plant Status, conducted routine reviews using IP 71152, Problem Identification and Resolution, 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) (4 Samples)
The inspectors evaluated system configurations during partial walkdowns of the following systems/trains:
- (1) Unit 2 "A" train of containment spray system on January 5, 2022
- (2) Unit 2 "A" Emergency Diesel Generator (EDG) on January 11, 2022 (3)2A1 and 2A2 component cooling water pumps on February 5, 2022
- (4) Unit 1 "A" train of auxiliary feedwater system on March 22, 2022
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 2 TD 6.9kV Switchgear room on January 4, 2022
- (2) Unit 1 Exterior Doghouse on January 6, 2022
- (3) Service building basement (instrument air/fire jockey pumps) on January 24, 2022
- (4) Unit 2 Exterior Doghouse on January 25, 2022
- (5) Unit 1 and Unit 2 Auxiliary Building Elevation 750 on February 1, 2022
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 January 12, 2022
71111.07A - Heat Exchanger/Sink Performance
Annual Review (IP Section 03.01) (1 Sample)
The inspectors evaluated readiness and performance of:
- (1) Unit 1 B EDG Heat Exchanger (WO 20418971)
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 surveillance testing of the Unit 1 turbine driven auxiliary feedwater pump on January 29, 2022, and Unit 2 reactor startup activities on February 22, 2022.
Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)
- (1) The inspectors observed and evaluated active simulator exam cold crew exam #1, on March 2, 2022. The scenario involving a nuclear instrument failure, followed by a failed open pressurizer power operated relief valve (PORV), and a loss of heat sink accident.
71111.12 - Maintenance Effectiveness
Maintenance Effectiveness (IP Section 03.01) (3 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) 2413892, Standby shutdown facility (SSF) diesel generator failed periodic test, on January 28, 2022
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 2 spent fuel pool cooling (A train) time to 200F less than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, on January 3, 2022
- (2) Equipment protection plan for the 2A EDG maintenance outage, on January 10, 2022
- (3) Equipment protection plan for the Unit 1 standby makeup pump out of service during refueling canal inspections, on January 19, 2022
- (4) Equipment protection plan for the Unit 1 EVCC battery and battery charger out of service during battery performance test, on January 25, 2022
- (5) Equipment protection plan for Unit 1 A EDG out of service for planned maintenance, on February 24, 2022
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:
- (2) NCR 2410912, Unexpected alarms and bistables lit during testing, on January 6, 2022
- (3) NCR 2411069, 2EMF31 detector failure, on January 13, 2022
- (4) NCR 2412331, Water present in the SSF diesel fuel oil tank during monthly surveillance, on January 18, 2022
- (5) NCR 2413424, Foreign material in lower ice condenser (Unit 1), on January 31, 2022
71111.19 - Post-Maintenance Testing
Post-Maintenance Test Sample (IP Section 03.01) (5 Samples)
The inspectors evaluated the following post-maintenance testing activities to verify system operability and/or functionality:
- (1) PT/1/A/4350/002 B, "Diesel Generator 1B Operability Test," after fluid checks on the 1B EDG, on January 4, 2022 (2)2A nuclear service water (RN) pump started in accordance with OP/2A/6400/006 Nuclear Service after torque checks on 0RN-148AC, 1A & 2A RN Discharge to RC X-over Isolation, on January 19, 2022
- (3) PT/2/A/4350/002 A, "Diesel Generator 2A Operability Test," following a maintenance outage, on January 27, 2022
- (4) OP/0/A/6450/001, "Control Area Ventilation/Chilled Water," after replacement of 1RN-460, B YC Chiller Condenser Control Actuator, on February 1, 2022 ( WO20508586-07)
- (5) PT/2/A/4350/002 A, "Diesel Generator 2A Operability Test," after fluid checks on the 2A EDG, on March 15, 2022
71111.20 - Refueling and Other Outage Activities
Refueling/Other Outage Sample (IP Section 03.01) (1 Partial)
(1)
(Partial)
The inspectors evaluated Unit 2 forced outage (manual reactor trip due to secondary control issues) activities from February 21, 2022, to February 23, 2022.
71111.22 - Surveillance Testing
The inspectors evaluated the following surveillance testing activities to verify system operability and/or functionality:
Surveillance Tests (other) (IP Section 03.01) (3 Samples)
- (1) PT/2/A/4252/001, #2 TD CA Pump Performance Test, on January 21, 2022
- (2) PT/1/A/4206/001 A, 1A NI Pump Performance Test, on January 26, 2022
- (3) PT/0/A/4200/002, Standby Shutdown Facility Operability Test, on January 27, 2022
Inservice Testing (IP Section 03.01) (1 Sample)
- (1) PT/1/A/4403/001 B, 1B RN Pump Performance Test, on January 8, 2022
FLEX Testing (IP Section 03.02) (1 Sample)
- (1) Flex Test Checklist, UHP 300/450 D5-TC (Medium Pressure Flex Hale Pump #4), on February 9,
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)===
- (1) Unit 1 (January 1, 2021 through December 31, 2021)
- (2) Unit 2 (January 1, 2021 through December 31, 2021)
IE03: Unplanned Power Changes per 7000 Critical Hours Sample (IP Section 02.02) (2 Samples)
- (1) Unit 1 (January 1, 2021 through December 31, 2021)
- (2) Unit 2 (January 1, 2021 through December 31, 2021)
IE04: Unplanned Scrams with Complications (USwC) Sample (IP Section 02.03) (2 Samples)
- (1) Unit 1 (January 1, 2021 through December 31, 2021)
- (2) Unit 2 (January 1, 2021 through December 31, 2021)
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) NCR 2397398, 2ETB blackout during emergency safeguards features testing restoration sequence.
71153 - Follow Up of Events and Notices of Enforcement Discretion Event Follow-up (IP Section 03.01)
- (1) The inspectors evaluated the manual reactor trip of Unit 2 as a result of secondary turbine control instability and licensees response on January 18, 2022.
Event Report (IP Section 03.02) (1 Sample)
The inspectors evaluated the following licensee event reports (LERs):
- (1) LER 05000370/2021-001-00, Valid Actuations of the Unit 2 B Train Emergency AC Power System and B Train Auxiliary Feedwater System (ADAMS Accession No.
ML21315A006). The inspectors determined that it was not reasonable to foresee or correct the cause discussed in the LER therefore no performance deficiency was identified. The inspectors did not identify a violation of NRC requirements.
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 18, 2022, the inspectors presented the integrated inspection results to Ed Pigott and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
MCFD-2563-
01.00
Unit 2 Flow Diagram of Containment Spray System
Drawings
MCFD-2573-
01.00
Unit 2 Flow Diagram of Component Cooling System
OP/1/A/6250/002
Auxiliary Feedwater System
OP/2/A/6350/002
Diesel Generator
Procedures
OP/2/A/6350/002
A
2A Diesel Generator
CSD-MNS-PFP-
AB-0750-001
Unit 1 and 2 Auxiliary Building Elevation 750
CSD-MNS-PFP-
AB-750-001
Auxiliary Building Elev 750 Pre-Fire Plan
CSD-MNS-PFP-
EDH1-000-001
U1 Exterior Doghouse Elevation 736 Pre-Fire Plan
Fire Plans
CSD-MNS-PFP-
EDH1-000-002
U2 Exterior Doghouse Elevation 767 Pre-Fire Plan
Procedures
AD-EG-ALL-1520
Transient Combustible Control
Procedures
AP/0/A/5500/044
Plant Flooding
Procedures
AD-OP-ALL-1000
Conduct of Operations
Corrective Action
Documents
2399317
Unit 2 ETB failed to close following Load Sequencer
maintenance during planned outage M2R27
AD-EG-ALL-1204
Single Point Vulnerability Identification, Elimination and
Mitigation
AD-EG-ALL-1206
Equipment Reliability Classification
AD-EG-ALL-1209
System, Component, and Program Health Reports and
Notebooks
AD-EG-ALL-1210
Procedures
AD-EG-ALL-1211
System Performance Monitoring and Trending
Procedures
AD-OP-ALL-0201
Protected Equipment
Self-Assessments
M1R28 Risk Review Assessment
AD-EG-ALL-1211
System Performance Monitoring and Trending
Procedures
AD-OP-ALL-0102
Operability Decision Making
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
AD-OP-ALL-0105
Operability Determinations and Functionality Assessment
Procedures
AD-EG-ALL-1155
Post Modification Testing
AD-EG-ALL-1202
Preventive Maintenance and Surveillance Testing
Administration
AD-EG-ALL-1720
Inservice Testing (IST) Program Implementation
Procedures
AD-WC-ALL-0250
Work Implementation and Completion
AD-LS-ALL-0004
NRC Performance Indicators and Monthly Operating Report
71151
Procedures
AD-PI-ALL-0100
Corrective Action Program
Corrective Action
Documents
NCR 2397398
2ETB Blackout during ESF testing restoration sequence
AD-LS-ALL-0006
Notification/Reportability Evaluation
AD-PI-ALL-0100
Corrective Action Program
Procedures
AD-PI-ALL-0105
Effectiveness Reviews
Engineering
Evaluations
MNS Sequencer Reset Issue Licensee Event Report -
Safety Analysis White Paper
Procedures
AD-PI-ALL-0106
Cause Investigation Checklist (NCR 2397398)