IR 05000261/2024003

Integrated Inspection Report 05000261/2024003

ML24303A343
Person / Time
Site:	Robinson
Issue date:	10/30/2024
From:	Matthew Fannon NRC/RGN-II/DORS/PB2
To:	Basta L Duke Energy Progress
References
IR 2024003
Download: ML24303A343 (1)

Text

SUBJECT:

H.B. ROBINSON STEAM ELECTRIC PLANT - INTEGRATED INSPECTION REPORT 05000261/2024003

Dear Laura Basta:

On September 30, 2024, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at H.B. Robinson Steam Electric Plant. On October 17, 2024, 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, Matthew S. Fannon, Chief Projects Branch 2 Division of Operating Reactor Safety Docket No. 05000261 License No. DPR-23

Enclosure:

As stated

Inspection Report

Docket Number: 05000261

License Number: DPR-23

Report Number: 05000261/2024003

Licensee: Duke Energy Progress, LLC

Facility: H.B. Robinson Steam Electric Plant

Location: Hartsville, SC

Inspection Dates: July 01, 2024 to September 30, 2024

Inspectors: V. Gaffney, Resident Inspector J. Zeiler, Senior Resident Inspector

Approved By: Matthew S. Fannon, Chief Projects Branch 2 Division of Operating Reactor Safety

Enclosure

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at H.B. Robinson Steam Electric Plant, 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 2 operated at or near rated thermal power (RTP) for the entire duration of the 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

Impending Severe Weather Sample (IP Section 03.02) (3 Samples)

(1) The inspectors evaluated the adequacy of the overall preparations to protect risk-significant systems from impending severe weather for Tropical Storm Debby on August 5-8, 2024.

(2) The inspectors evaluated the adequacy of the overall preparations to protect risk-significant systems from impending severe weather for tropical cyclone #8 on September 16, 2024.

(3) The inspectors evaluated the adequacy of the overall preparations to protect risk-significant systems from impending severe weather for Tropical Storm Helene on September 26-27, 2024.

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) 'B' motor driven auxiliary feedwater (MDAFW) pump and steam driven auxiliary feedwater (SDAFW) pump while 'A' MDAFW pump was out of service for preventive maintenance on July 30, 2024

(2) 'B' spent fuel pool cooling (SFPC) pump while 'A' SFPC pump was out of service due to emergent loss of oil from the pump drive on August 4, 2024

(3) 'A' and 'B' chemical and volume control system (CVCS) charging pumps while the 'C' CVCS charging pump was out of service for emergent failure to start on August 20, 2024

(4) 'A' MDAFW pump and 'C' diesel driven AFW pump while the SDAFW pump was out of service for preventive maintenance on September 3, 2024

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) spent fuel pool storage area on fuel handling building elevation 275 (fire zone 28A) on July 21, 2024

(2) 'A' and 'B' vital battery room (fire zone 16) on July 25, 2024

(3) SDAFW pump area on turbine building elevation 226 (fire zone 25B) on July 30, 2024

(4) 'A' emergency diesel generator (EDG) room (fire zone 2) on August 7, 2024

(5) control room heating, ventilation, and air conditioning equipment room (fire zone 17)on September 12, 2024

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

(1) The inspectors evaluated the onsite fire brigade training and performance during an unannounced fire drill on September 12, 2024.

71111.06 - Flood Protection Measures

Flooding Sample (IP Section 03.01) (2 Samples)

(1) The inspectors evaluated external flooding mitigation protections in manhole cable vaults M-50A and M-50B for the service water pump motors on July 8, 2024.

(2) The inspectors evaluated external flooding mitigation protections associated with the Lake Robinson Dam spillway (Tainter) gates and post-modification testing of the 'B' Tainter gate and hoist system following replacement on August 21, 2024.

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 a planned reactor down power to 98.5% RTP and restoration to full power to conduct 'A' MDAFW pump testing on July 30, 2024.

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

(1) The inspectors observed and evaluated a licensed operator requalification simulator training scenario on July 24, 2024.

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) 'A' CVCS charging pump failure due to faulted motor on June 13, 2024 [nuclear condition report (NCR) 2519275]

(2) 'A' SFPC pump motor breaker found tripped on electrical overload fault on July 18, 2024 (NCR 2522791)

Aging Management (IP Section 03.03) (1 Sample)

The inspectors evaluated the effectiveness of the aging management program for the following SSCs that did not meet their inspection or test acceptance criteria:

(1) degraded wall penetration insulation due to fire/heat in 'A' EDG exhaust piping (NCR

===2520936)

71111.13 - Maintenance Risk Assessments and Emergent Work Control

Risk Assessment and Management Sample (IP Section 03.01)===

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) elevated risk (Green) during planned corrective maintenance to replace suspected broken pump valve spring on the 'A' CVCS charging pump on July 9-10, 2024

(2) elevated risk (Green) during planned preventive maintenance on 'A' MDAFW pump and valves on July 30, 2024

(3) elevated risk (Green) during emergent troubleshooting to repair the 'C' CVCS charging pump due to failure to start on August 20, 2024

(4) elevated risk (Green) during planned pump and valve preventive maintenance on the SDAFW pump on September 3, 2024

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 2518201, 'A' reactor coolant pump excessive #3 seal leak-by causing frequent standpipe low level alarms beginning mid-June, 2024

(2) NCR 2522219, 'A' EDG electrical metal junction box containing governor control wiring contacting bare engine exhaust manifold, review completed July 22, 2024

(3) NCR 2524500, 'A' SFPC pump significant decrease in oil level identified following pump rebuild maintenance on August 4, 2024

(4) NCR 2527908, minor reactor coolant system pressure control perturbations exhibited on September 6, 2024

(5) NCR 2529132, 'B' EDG governor speed setting found changed from 13.60 to 13.36 on September 21, 2024

71111.18 - Plant Modifications

Temporary Modifications and/or Permanent Modifications (IP Section 03.01 and/or 03.02) (2 Samples)

The inspectors evaluated the following temporary or permanent modifications:

(1) engineering change (EC) 420743, replace 'B' instrument air compressor dryer

(2) EC 415523, Lake Robinson spillway Tainter gate and hoist replacement (specific to

'B' Tainter gate)

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) (7 Samples)

(1) OST-201-1, MDAFW System Component Test - Train A, following preventive maintenance on 'A' MDAFW pump on July 30, 2024

(2) Work Order (WO) 20651495 instructions for blowing down instrument sensing lines for 'A' train service water supply header pressure on July 31, 2024

(3) OST-402, Auxiliary Feedwater System, Section 6.1.3, Testing C AFW Train, following preventive maintenance on the 'C' diesel driven AFW pump on August 20, 2024

(4) OST-101.3, CVCS Component Test Charging Pump 'C', following corrective maintenance to restore oil prime in pump gyrol fluid drive unit on August 20, 2024

(5) OST-551-2, Turbine Trip Functional Test, following corrective maintenance to disassemble and clean turbine trip Quadvoter solenoid operated valve EV-4459D on August 26, 2024

(6) OP-306, Component Cooling Water System, Section 6.2.1, Operating CCW Pumps, following lubrication preventive maintenance on the 'A' CCW pump on September 16, 2024

(7) OP-903, Service Water System, Section 6.2.1 for swapping operating service water booster pump (SWBP) from 'B' pump to 'A' pump following 'A' SWBP lubrication preventive maintenance on September 25, 2024

Surveillance Testing (IP Section 03.01) (2 Samples)

(1) OST-409-1, EDG A Fast Speed Start, on August 1, 2024

(2) OST-202, Steam Driven Auxiliary Feedwater System Component Test, on September 3, 2024

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

(1) OST-207, Comprehensive Flow Test for the MDAFW Pumps, on July 30, 2024

71114.06 - Drill Evaluation

Additional Drill and/or Training Evolution (1 Sample)

The inspectors evaluated:

(1) A simulator-based licensed operator training scenario on July 24,

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 2 (July 1, 2023, through June 30, 2024)

IE03: Unplanned Power Changes per 7000 Critical Hours Sample (IP Section 02.02) (1 Sample)

(1) Unit 2 (July 1, 2023, through June 30, 2024)

MS08: Heat Removal Systems (IP Section 02.07) (1 Sample)

(1) Unit 2 (July 1, 2023, through June 30, 2024)

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) fire in the wall penetration insulation surrounding the 'A' EDG exhaust piping (NCR 2520936)

(2) Robinson site clearance and tagging adverse trend identified (NCR 2522397)

INSPECTION RESULTS

No findings were identified.

EXIT MEETINGS AND DEBRIEFS

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

• On October 17, 2024, the inspectors presented the integrated inspection results to Laura Basta and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.01 Procedures AD-OP-ALL-0120 Severe Weather Preparations and Considerations Rev. 0

AD-OP-RNP-Severe Weather Response Rev. 0

20

OP-218 Lake Robinson Spillway Equipment Rev. 23

71111.04 Procedures OP-301 Chemical and Volume Control Systems Operation and Rev. 128

Alignments

OP-402 Auxiliary Feedwater System Rev. 17

OP-910 Spent Fuel Pit Cooling and Purification System Rev. 52

71111.05 Fire Plans CSD-RNP-PFP-Auxiliary Building Elevation 226 Pre-Fire Plan Rev. 3

AB2-0226-01

CSD-RNP-PFP-Auxiliary Building Elevation 246 Pre-Fire Plan Rev. 1

AB2-0246-001

CSD-RNP-PFP-Fuel Handling Building Elevation 226 Pre-Fire Plan Rev. 0

FB2-0226-001

CSD-RNP-PFP-Turbine Building Elevation 226 Pre-Fire Plan Rev. 2

TB2-0226-001

Procedures AD-FP-ALL-1520 Transient Combustible Control Rev. 2

AD-FP-ALL-1551 Fire Protection Impairments Rev. 2

AD-OP-ALL-0207 Fire Brigade Administrative Controls Rev. 6

AD-TQ-ALL-0086 Fire Brigade and Hazmat Training Rev. 6

AOP-041 Response to Fire Event Rev. 17

CSD-RNP-PFP-Fire Brigade Standard Operating Guidance Rev. 1

SOGS-001

FP-012 Fire Protection Systems Minimum Equipment and Rev. 39

Compensatory Actions

OMM-002 Fire Protection Manual Rev. 58

OP-906 Heating, Ventilation, and Air Conditioning Rev. 100

71111.06 Engineering EC 415523 'B' Tainter Gate Replacement Modification Test Plan 8/21/2024

Changes

Work Orders WO 20645894 Inspect M50A and M50B buried cables 7/8/2024

71111.11Q Procedures AD-OP-ALL-1000 Conduct of Operations Rev. 23

AD-TQ-ALL-0420 Conduct of Simulator Training and Evaluation Rev. 20

Inspection Type Designation Description or Title Revision or

Procedure Date

OP-105 Maneuvering the Plant When Greater than 25% Power Rev. 74

71111.12 Procedures AD-EG-ALL-1210 Maintenance Rule Program Rev. 5

71111.13 Procedures AD-WC-ALL-On-Line Work Management Rev. 22

200

AD-WC-ALL-On-Line Risk Management Process Rev. 6

240

CSD-WC-RNP-RNP ERAT Guidance Rev. 1

240-00

OMM-048 Work Coordination and Risk Assessment Rev. 71

71111.15 Procedures AD-OP-ALL-0105 Operability Determinations Rev. 7

71111.18 Procedures AD-EG-ALL-1110 Design Review Requirements Rev. 11

AD-EG-ALL-1122 Failure Modes and Effects Analysis and Single Failure Rev. 2

Analysis

AD-EG-ALL-1132 Preparation and Control of Engineering Changes Rev. 27

AD-EG-ALL-1137 Engineering Change Product Selection Rev. 12

71111.24 Procedures PLP-033 Post-Maintenance Testing (PMT) Program Rev. 70

71114.06 Procedures AD-EP-ALL-0101 Emergency Classification Rev. 5

AD-EP-ALL-0105 Activation and Operation of the Technical Support CenterRev. 13

AD-EP-ALL-0111 Control Room Activation of the ERO Rev. 8

AD-EP-ALL-0304 State and County Notifications Rev. 7

AD-EP-RNP-RNP Site Specific TSC Support Rev. 4

0105

CSD-EP-RNP-EAL Wallchart Rev. 3

0101-02

71151 Procedures AD-EG-ALL-1217 Mitigating System Performance Index (MSPI) Rev. 3

AD-PI-ALL-0700 Performance Indicators Rev. 6

71152A Procedures AD-PI-ALL-0100 Corrective Action Program Rev. 30

AD-PI-ALL-0106 Cause Investigation Checklists Rev. 10

AD-PI-ALL-0200 Performance Trending Rev. 14

9