IR 05000261/2022003

– Integrated Inspection Report 05000261 2022003

ML22307A128
Person / Time
Site:	Robinson
Issue date:	11/03/2022
From:	David Dumbacher Division Reactor Projects II
To:	Flippin N Duke Energy Progress
References
IR 2022003
Download: ML22307A128 (12)

Text

SUBJECT:

H.B. ROBINSON STEAM ELECTRIC PLANT - INTEGRATED INSPECTION REPORT 05000261/2022003

Dear Nicole Flippin:

On September 30, 2022, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at H.B. Robinson Steam Electric Plant. On October 19, 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, David E. Dumbacher, Chief Reactor Projects Branch 3 Division of Reactor Projects Docket No. 05000261 License No. DPR-23

Enclosure:

As stated

Inspection Report

Docket Number: 05000261

License Number: DPR-23

Report Number: 05000261/2022003

Licensee: Duke Energy Progress, LLC

Facility: H.B. Robinson Steam Electric Plant

Location: Hartsville, SC

Inspection Dates: July 01, 2022 to September 30, 2022

Inspectors: J. Zeiler, Senior Resident Inspector

Approved By: David E. Dumbacher, Chief Reactor Projects Branch 3 Division of Reactor Projects

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 began the inspection period at rated thermal power. On September 24, 2022, the unit was shut down for repairs to the 'C' reactor coolant pump (RCP) seal package due to increased number 2 RCP seal flow. The unit remained shut down 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.

71111.01 - Adverse Weather Protection

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 from tropical storm Ian from September 29-30, 2022.

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) 'A' motor driven auxiliary feedwater (MDAFW) pump while 'B' MDAFW pump was out of service for preventive maintenance on July 12, 2022

(2) 'B' and 'C' chemical and volume control system (CVCS) charging pumps while 'A' CVCS pump was out of service for preventive maintenance on July 13, 2022

(3) 'A' residual heat removal (RHR) pump while 'B' RHR pump was out of service for preventive maintenance on July 19, 2022

Complete Walkdown Sample (IP Section 03.02) (1 Sample)

(1) The inspectors evaluated system configurations during a complete walkdown of the containment spray system on August 26, 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) MDAFW room (fire zone 6) on July 12, 2022

(2) CVCS charging pump room (fire zone 4) on July 13, 2022

(3) 'B' emergency diesel generator (EDG) room (fire zone 1) on July 27, 2022

(4) boron injection tank room (fire zone 8) on August 23, 2022

(5) north, south, and middle pipe alley areas (fire zone 11) on August 24, 2022

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

(1) The inspectors evaluated the on-site fire brigade training and performance during an unannounced fire drill on July 29, 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) RHR pump room (internal flood zone FLC270) on September 12-23, 2022

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 the following activities:

reactor down power to 99 percent and restoration to full power during the performance of OST-201-2, MDAFW System Component Test - Train B, on July 12, 2022 reactor reactivity manipulations associated with the performance of EST-146, End-of-Life Moderator Temperature Coefficient Measurement, on August 12, 2022

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

(1) The inspectors observed and evaluated a simulator scenario for operator training involving an earthquake followed by a loss of reactor coolant system and containment integrity on September 12, 2022.

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) south service water header check valve SW-545 failure to close fully during testing

[Nuclear Condition Report (NCR) 2435942] on July 28, 2022

(2) 'B' charging pump discharge line leakage identified at weld upstream of pressure indicator PI-152 isolation valve (NCR 2438722) on August 19, 2022

71111.13 - Maintenance Risk Assessments and Emergent Work Control

Risk Assessment and Management Sample (IP Section 03.01) (6 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) elevated (Green) online risk during planned preventive maintenance associated with the 'B' MDAFW pump on July 12, 2022

(2) elevated (Green) online risk during planned preventive maintenance associated with the 'A' CVCS charging pump on July 13, 2022

(3) elevated (Green) online risk during planned preventive maintenance associated with the 'B' RHR pump on July 19, 2022

(4) elevated (Green) online risk during performance of end-of-life moderator temperature coefficient testing per procedure EST-146 on August 12, 2022

(5) work activity risk assessment during "Yellow Hands Off" elevated risk due to reduced grid generation capacity margin on August 30, 2022

(6) elevated (Yellow for core decay heat removal shutdown key safety function area)during forced outage to replace 'C' RCP seal package on September 27, 2022

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 2430781, electro-hydraulic control (EHC) fluid leakage at supply fitting to main steam stop valve MS-313 on June 11, 2022

(2) NCR 2431858, EHC fluid sample analysis results show elevated levels of fine breakdown products on July 28, 2022

(3) NCR 2438722, small through wall leakage from tubing line weld crack upstream of pressure indicator PI-152 on discharge of 'B' charging pump on August 19, 2022

(4) NCR 2441153, degraded No. 2 seal on 'C' RCP based on elevated leakage flows on September 6, 2022

(5) NCR 2441486, failure of main turbine overspeed Quadvoter valve EV-4459B to cycle during turbine trip testing on September 13, 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 modifications:

(1) engineering change (EC) 421321, temporary modification to restore fire water to hose station FH-70 due to underground leak in fire water piping supply to the hose station

71111.19 - Post-Maintenance Testing

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

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

(1) OST-201-2, MDAFW System Component Test - Train B, following 'B' MDAFW pump oil cooler preventive maintenance on July 12, 2022

(2) OST-251-2, RHR Pump B and Components Test, following 'B' RHR pump motor oil lubrication preventive maintenance on July 19, 2022

(3) work order (WO) 20547085, leakage verification, following installation of temporary modification to repair underground fire protection piping leak on August 5, 2022

(4) OP-301B, Chemical and Volume Control System Charging Pump B Operation, and WO 20554904, visual inspection, following weld repair of 'B' charging pump discharge leak on August 19, 2022

(5) OST-551-2, Turbine Trip Functional Test, following emergent maintenance on failed turbine overspeed trip valve EV-4459C on September 13, 2022

(6) OST-151-3, Safety Injection System Components Test Pump C, following safety injection pump room cooler and fan HVH-6B preventive maintenance on September 21, 2022

71111.20 - Refueling and Other Outage Activities

Refueling/Other Outage Sample (IP Section 03.01) (1 Partial)

(1) (Partial)

The inspectors evaluated a forced outage to replace the 'C' RCP seal package due to excessive No. 2 seal leakage from September 24-30, 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) OST-409-1, EDG A Fast Speed Start, on July 27, 2022

(2) OST-409-2, EDG B Fast Speed Start, on August 9, 2022

(3) EST-146, End-of-Life Moderator Temperature Coefficient Measurement, on August 12, 2022

Inservice Testing (IP Section 03.01) (1 Sample)

(1) OST-252-2, RHR System Valve Test - Train B, on July 19, 2022

71114.06 - Drill Evaluation

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

The inspectors observed and evaluated:

(1) an emergency preparedness drill that involved an earthquake followed by a loss of coolant accident, fuel failure, and subsequent radiological release from containment, on September 12,

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, 2021, through June 30, 2022)

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

(1) Unit 2 (July 1, 2021, through June 30, 2022)

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

(1) Unit 2 (July 1, 2021, through June 30, 2022)

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 2430781, turbine EHC leak at supply fitting for EH-21, EHC fluid to main steam stop valve MS-313

(2) NCR 2436138, alarm locked in and cannot be reset for acoustic monitor VE-551B associated with pressurizer safety valve RC-551B

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 19, 2022, the inspectors presented the integrated inspection results to Nicole Flippin and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.01 Procedures AP-053 Severe Weather Response Rev. 10

OMM-021 Operation During Adverse Weather Conditions Rev. 62

71111.04 Drawings 5379-1082, Sheet Safety Injection System Flow Diagram Rev. 28

5379-1082, Sheet Safety Injection System Flow Diagram Rev. 40

Procedures OP-201 Residual Heat Removal System Rev. 80

OP-202 Safety Injection and Containment Vessel Spray System Rev. 105

OP-301 Chemical and Volume Control System Operations and Rev. 124

Alignments

OP-402 Auxiliary Feedwater System Rev. 112

71111.05 Fire Plans CSD-RNP-PFP-Auxiliary Building Elevation 226 Pre-Fire Plan Rev. 0

AB2-0226-001

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

TB2-0226-001

Miscellaneous Drill ID: 22-03-Fire drill scenario 25 for AFW Pump Room Rev. 5

05U

Procedures AD-OP-ALL-0207 Fire Brigade Administrative Controls Rev. 5

71111.06 Calculations RNP-F/PSA-0009 Assessment of Internally Initiated Flood Events Rev. 2

RNP-F/PSA-0105 Robinson Nuclear Plant Internal Flooding Analysis Rev. 3

RNP-F/PSA-0113 Robinson Nuclear Plant Internal Flooding PRA Quantification Rev. 4

and Results Analysis

71111.11Q Procedures AOP-016 Excessive Primary Plant Leakage Rev. 28

AOP-021 Seismic Disturbances Rev. 29

EOP-E-0 Reactor Trip or Safety Injection Rev. 11

EOP-E-1 Loss of Reactor or Secondary Coolant Rev. 8

EOP-ES-1.3 Transfer to Cold Leg Recirculation Rev. 2

OP-105 Maneuvering the Plant When Greater Than 25% Power Rev. 73

71111.13 Work Orders WO 20488010 'B' MDAFW lube oil cooler cleaning 7/12/2022

WOs 20367542, 'A' CVCS charging pump packing replacement, valve 7/13/2022

20489797, and maintenance, and seal water tubing replacement

20544880

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.15 Procedures AD-OP-ALL-0105 Operability Determinations Rev. 6

71111.19 Procedures PLP-033 Post-Maintenance Testing (PMT) Program Rev. 69

Work Orders WOs 20514402 'B' RHR pump annual motor lubrication preventive 7/19/2022

and 20537993 maintenance

71111.20 Procedures AD-WC-ALL-Shutdown Risk Management Rev. 7

20

AD-WC-RNP-Shutdown Safety Function Guidelines Rev. 20

20

GP-006-1 Normal Plant Shutdown From Power Operation to Hot Rev. 24

Standby

GP-007 Plant Cooldown From Mode 3 to Mode 5 Rev. 116

GP-008 Draining the Reactor Coolant System Rev. 98

71111.22 Procedures OP-604-1 Diesel Generator 'A' Operations Rev. 2

OP-604-2 Diesel Generator 'B' Operations Rev. 2

71114.06 Procedures AD-EP-ALL-0100 Emergency Response Organization (ERO) Rev. 7

AD-EP-ALL-0101 Emergency Classification Rev. 3

AD-EP-ALL-0105 Activation and Operation of the Technical Support Center Rev. 8

AD-EP-ALL-0109 Offsite Protective Action Recommendations Rev. 8

AD-EP-ALL-0111 Control Room Activation of the ERO Rev. 5

AD-EP-ALL-0803 Evaluation and Critique of Drills and Exercises Rev. 8

AD-EP-RNP-RNP Site Specific TSC Support Rev. 2

0105

71151 Procedures AD-EG-ALL-1217 Mitigating System Performance Index (MSPI) Rev. 2

AD-PI-ALL-0700 Performance Indicators Rev. 5

10