IR 05000413/2022002
| ML22208A291 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 07/29/2022 |
| From: | Eric Stamm NRC/RGN-II/DRP/RPB1 |
| To: | Simril T Duke Energy Carolinas |
| References | |
| IR 2022002 | |
| Download: ML22208A291 (11) | |
Text
July 28, 2022
SUBJECT:
CATAWBA NUCLEAR STATION - INTEGRATED INSPECTION REPORT 05000413/2022002 AND 05000414/2022002
Dear Mr. Simril:
On June 30, 2022, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Catawba Nuclear Station. On July 28, 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. 05000413 and 05000414 License Nos. NPF-35 and NPF-52
Enclosure:
As stated
Inspection Report
Docket Numbers:
05000413 and 05000414
License Numbers:
Report Numbers:
05000413/2022002 and 05000414/2022002
Enterprise Identifier:
I-2022-002-0015
Licensee:
Duke Energy Carolinas, LLC
Facility:
Catawba Nuclear Station
Location:
York, South Carolina
Inspection Dates:
April 1, 2022, to June 30, 2022
Inspectors:
J. Austin, Senior Resident Inspector
D. Rivard, Resident Inspector
S. Downey, Senior Reactor 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 Catawba 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 05000414/2021-001-00 Indication Identified During Reactor Pressure Vessel Head Nozzle Penetration Inspection 71153 Closed
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 April 23, 2022, Unit 2 was manually tripped following two dropped control rods during control rod movement testing. The unit was returned to full power operation on April 29, 2022, and remained at or near 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 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
71111.01 - 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 extreme high temperatures for the following systems:
Service water pump house on June 2, 2022
Emergency supplemental power supply diesel and switchgear on June 2, 2022
Offsite AC power switchyard and relay house on June 22, 2022
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 1 steam generator power operated relief valves on April 12, 2022
- (2) Unit 1 vital dc switchgear on April 19, 2022
- (3) Unit 1 A emergency diesel generator (EDG) on June 2, 2022
- (4) Safe shutdown facility on June 2, 2022
71111.05 - Fire Protection
Fire Area Walkdown and Inspection Sample (IP Section 03.01) (6 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 22: Units 1 and 2 Auxiliary Building Elev. 594 common area (rooms 500, 560, 561, 570, 571) on May 13, 2022
- (2) Fire Area 19: Unit 2 Auxiliary Building Elev. 594 and Unit 2 Electrical Penetration Room (rooms 563, 564) on May 13, 2022
- (3) Fire Area 20: Unit 2 Auxiliary Building Elev. 594 and Unit 1 Electrical Penetration Room (room 576) on May 13, 2022
- (4) Fire Area 21: Units 1 and 2 Auxiliary Building Elev. 594 Control Room (room 573) on June 16, 2022
- (5) Fire Area 16: Units 1 and 2 Auxiliary Building Elev. 574 and Unit 2 Cable Room (room 481) on June 17, 2022
- (6) Fire Area 17: Units 1 and 2 Auxiliary Building Elev. 574 and Unit 1 Cable Room (room 491) on June 17, 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) Power house yard
71111.11Q - Licensed Operator Requalification Program and Licensed Operator Performance
Licensed Operator Performance in the Actual Plant/Main Control Room (IP Section 03.01) (2 Samples)
- (1) The inspectors observed and evaluated licensed operator performance in the control room during Unit 2 reactor startup on April 26, 2022.
- (2) The inspectors observed and evaluated licensed operator performance in the control room during Unit 1 main turbine testing on May 7, 2022.
Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)
- (1) The inspectors observed and evaluated a recorded simulator requalification scenario and critique that contained 1A steam generator feed regulation valve failure, main generator load rejection, main turbine runback, trip of the 2B component cooling pump, reactor coolant system leak, reactor trip, and reactor coolant system cooldown on May 16, 2022.
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 remain capable of performing their intended function:
- (1) Nuclear condition report (NCR) 2423946, 2A2 component cooling pump tripped on over current on April 15, 2022
- (2) NCR 2424782, Failure of (2AS-2) main steam to auxiliary steam header control valve on May 16, 2022
- (3) NCR 2424761, Rod control anomaly resulted in dropped control rods on May 26, 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) Safe shutdown facility out of service (OOS) for maintenance, on April 7, 2022 (2)2B EDG slow speed test, on April 18, 2022
- (3) Unit 2 solid state protection system testing, on May 5, 2022
- (4) Unit 2 turbine driven auxiliary feed pump testing, on May 26, 2022 (5)2A EDG OOS for maintenance, on June 7, 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:
- (4) NCR 2426293, 1B NV [chemical and volume control system] pump oil leak on May 16, 2022
- (5) NCR 2427798, Meteorological tower data recording requirements on May 23, 2022
- (6) NCR 2425121, Unit 2 electrohydraulic control system fault during weekly main turbine trip testing on June 6, 2022
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 modification:
- (1) Engineering change 41799, Technical support center air conditioning upgrade on April 8, 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) Work Request (WR) 20224074, meteorological wind direction inaccuracies, on April 14, 2022
- (2) PT/1/A/4200/18A, CF [feedwater] valve in-service test of valve 1CF-88 following replacement of train B control solenoid valve 1CFSV0881, Work Order (WO) 20531056
- (3) WR 20224751, 2YV [containment chilled water] chiller compressor tripped, on April 22, 2022
- (4) WR 20224794, main steam bypass to condenser valve position indication (2SB24),on April 23, 2022
- (5) WR 20225911, feedwater heater level control valve (2HW-161) failed closed, on May 9, 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/0/A/4150/019, 1/M approach to criticality, on April 26, 2022
- (2) PT/1/A/4350/002A, 1A emergency diesel generator slow start test, on May 10, 2022
- (3) PT/2/A/4250/003, C turbine driven auxiliary feedwater pump #2 performance test, for WO 20522997
FLEX Testing (IP Section 03.02) (1 Sample)
- (1) Procedure OSME GE 0002, Perform annual and quarterly FLEX PMs (Equipment List), WO 20503524,
OTHER ACTIVITIES - BASELINE
===71151 - Performance Indicator Verification The inspectors verified licensee performance indicators submittals listed below:
MS06: Emergency AC Power Systems (IP Section 02.05)===
- (1) Unit 1 (April 1, 2021, through March 31, 2022)
- (2) Unit 2 (April 1, 2021, through March 31, 2022)
MS07: High Pressure Injection Systems (IP Section 02.06) (2 Samples)
- (1) Unit 1 (April 1, 2021, through March 31, 2022)
- (2) Unit 2 (April 1, 2021, through March 31, 2022)
MS08: Heat Removal Systems (IP Section 02.07) (2 Samples)
- (1) Unit 1 (April 1, 2021, through March 31, 2022)
- (2) Unit 2 (April 1, 2021, through March 31, 2022)
71152S - Semiannual Trend Problem Identification and Resolution Semiannual Trend Review (Section 03.02)
- (1) The inspectors reviewed the licensees risk evaluation program for potential adverse trends in corrective actions that might be indicative of a more significant safety issue.
71153 - Follow Up of Events and Notices of Enforcement Discretion Event Followup (IP Section 03.01)
- (1) The inspectors evaluated Unit 2 reactor trip and auxiliary feedwater actuation and the licensees response on April 22, 2022.
Event Report (IP Section 03.02) (1 Sample)
The inspectors evaluated the following licensee event report (LER):
- (1) LER 414/2021-001-00, Indication Identified During Reactor Pressure Vessel Head Nozzle Penetration Inspection (ADAMS Accession Number ML21172A302). 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 July 28, 2022, the inspectors presented the integrated inspection results to Tom Simril and other members of the licensee staff.
THIRD PARTY REVIEWS The inspectors reviewed the 2022 INPO Evaluation and Assistance report issued during the inspection period.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Corrective Action
Documents
Relevant UT Leak Path Indication confirmed on Reactor
Vessel Head Penetration 74
04/21/2021