IR 05000390/2024010

Age-Related Degradation Inspection Report 05000390/2024010 and 05000391/2024010

ML24067A215
Person / Time
Site:	Watts Bar
Issue date:	03/08/2024
From:	James Baptist Division of Reactor Safety II
To:	Jim Barstow Tennessee Valley Authority
References
IR 2024010
Download: ML24067A215 (13)

Text

SUBJECT:

WATTS BAR NUCLEAR PLANT - AGE-RELATED DEGRADATION INSPECTION REPORT 05000390/2024010 AND 05000391/2024010

Dear James Barstow:

On February 8, 2024, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Watts Bar Nuclear Plant and discussed the results of this inspection with Mr. Anthony Williams, Site Vice President, 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, James B. Baptist, Chief Engineering Branch 1 Division of Reactor Safety Docket Nos. 05000390 and 05000391 License Nos. NPF-90 and NPF-96

Enclosure:

As stated

Inspection Report

Docket Numbers: 05000390 and 05000391

License Numbers: NPF-90 and NPF-96

Report Numbers: 05000390/2024010 and 05000391/2024010

Licensee: Tennessee Valley Authority

Facility: Watts Bar Nuclear Plant

Location: Spring City, TN

Inspection Dates: January 22, 2024 to February 08, 2024

Inspectors: P. Carman, Senior Reactor Inspector J. Copeland, Reactor Inspector C. Even, Sr. Reactor Inspector J. Lizardi-Barreto, Reactor Inspector

Approved By: James B. Baptist, Chief Engineering Branch 1 Division of Reactor Safety

Enclosure

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an age-related degradation inspection at Watts Bar Nuclear 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.

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.

REACTOR SAFETY

71111.21N.04 - Age-Related Degradation Age-Related Degradation

For each sample listed below, inspectors reviewed licensee activities credited to address age-related degradation to assess whether they were being performed using appropriate standards and procedures, assessed against appropriate acceptance criteria, and that maintenance was being performed at an appropriate interval. Inspectors assessed whether issues identified during licensee activities were being appropriately entered into and addressed by the station corrective action program, and whether periodic assessments of maintenance effectiveness and operating experience were being completed.

(1) 480 VAC shutdown board breaker (0-BKR-548-131-S)

(2) A-A main control room heating ventilation and air conditioning air handling unit motor (0-MTR-31-12-A)

(3) Auxiliary building gas treatment system containment purge air isolation dampers (1,2-FCO-30-294/295)

(4) Control rod drive mechanism (CRDM) thermal sleeves

(5) Essential raw cooling water (ERCW) discharge piping (C-A)

(6) ERCW motor cooler (pumps A-A, B-A, C-A, D-A, E-B, F-B, G-B, H-B)

(7) Unit 1 and 2 hydrogen igniters

(8) Unit 2 motor driven auxiliary feedwater (MDAFW) pump 2B-B motor oil and bearings

INSPECTION RESULTS

No findings were identified.

EXIT MEETINGS AND DEBRIEFS

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

• On February 8, 2024, the inspectors presented the age-related degradation inspection results to Mr. Anthony Williams, Site Vice President, and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.21N.04 Calculations 0-TI-31.02 Plant Equipment Vibration Monitoring & Vibration Revision

Diagnostics Program 0003

71111.21N.04 Calculations 2-TSD-268-1 Permanent Hydrogen Mitigation System Rev. 0

71111.21N.04 Calculations EPMRD102092 Design Basis for the Hydrogen Mitigation SystemRev. 3

71111.21N.04 Calculations P.S.4.M.1.5 CLASSIFICATION, PROCUREMENT, RECEIPT Revision

AND USE OF LUBRICANTS 0008

71111.21N.04 Calculations SDD-N3-3B-4002 AUXILIARY FEEDWATER SYSTEM Rev. 0034

71111.21N.04 Calculations SDD-N3-83-4001 COMBUSTIBLE GAS CONTROL SYSTEM Unit 1 Rev. 0013

& 2

71111.21N.04 Calculations TVA Specification 1547 Steam-Turbine-Driven and Electric-Motor-Driven Rev. 2

Auxiliary Feedwater Pumping Units

71111.21N.04 Calculations WB-DC-40-64 DESIGN BASIS EVENTS DESIGN CRITERIA Rev. 23

71111.21N.04 Calculations WBN-DCD-30-7 POST ACCIDENT MONITORING Rev. 0031

INSTRUMENTATION

71111.21N.04 Calculations WBN-VTD-P076-0030 OPERATING AND MAINTENANCE Rev. 7

INSTRUCTIONS FOR PARSON-PEEBLES

INDUCTION MOTORS. (PUB. # GCM/254924)

71111.21N.04 Calculations WBNP-DS-1925-1547-01 Steam-Turbine-Driven and Electric-Motor-Driven 07/18/1975

Auxiliary Feedwater Pumping Units

71111.21N.04 Corrective Action CRs 1417696, 1606564,

Documents 1673882, 1740577,

1759092, 1829252,

1859824, 1859917,

1859918, 1884979,

1899866

71111.21N.04 Corrective Action CR 1905083 2024 ARD NRC Inspection-PNL 2-L-413 01/23/2024

Documents Corrosion

Resulting from

Inspection

71111.21N.04 Corrective Action CR 1905100 2024 ARD NRC Inspection - Insulation around 0-01/23/2024

Documents VTV-67-501F Deteriorating

Resulting from

Inspection Type Designation Description or Title Revision or

Procedure Date

Inspection

71111.21N.04 Corrective Action CR 1905139 2024 ARD NRC Inspection - 1A-A TWS Gearbox 01/23/2024

Documents Bolting Engagement

Resulting from

Inspection

71111.21N.04 Corrective Action CR 1905150 2024 ARD NRC Inspection - Loose bolt on 1-RFV- 01/23/2024

Documents 67-1042A Flange

Resulting from

Inspection

71111.21N.04 Corrective Action CR 1905229 2024 ARD NRC Inspection - B-Train ERCW Pump 01/24/2024

Documents Discharge Insulation Missing

Resulting from

Inspection

71111.21N.04 Corrective Action CR 1905233 2024 ARD NRC Inspection - Insulation issues 01/24/2024

Documents around 2-FCV-67-9A

Resulting from

Inspection

71111.21N.04 Corrective Action CR 1905235 2024 ARD NRC Inspection - Scaffold Debris 01/24/2024

Documents Around C-A ERCW Motor Base

Resulting from

Inspection

71111.21N.04 Corrective Action CR 1905325 2024 ARD NRC Inspection - Spring Unseated on 01/24/2024

Documents E-B ERCW Pump Pre-Lube Line

Resulting from

Inspection

71111.21N.04 Corrective Action CR 1906420 2024 ARD NRC Inspection - Unclear Instructions 01/29/2024

Documents on TVA Form NPG-SPP-09.7-8

Resulting from

Inspection

71111.21N.04 Corrective Action CR 1908053 2024 ARD NRC Inspection-Chemical label on 02/05/2024

Documents sodium hypochlorite bulk tank needs to be re-

Resulting from placed

Inspection

71111.21N.04 Corrective Action CR 1908061 2024 ARD NRC Inspection - CT1300 secondary 02/05/2024

Inspection Type Designation Description or Title Revision or

Procedure Date

Documents containment collecting rainwater

Resulting from

Inspection

71111.21N.04 Corrective Action CR 1908148 2024 ARD NRC Inspection - hypochlorite residual 02/06/2024

Documents around offgassing valves on the injection skid

Resulting from

Inspection

71111.21N.04 Corrective Action CR 1908184 2024 ARD NRC Inspection - Unclear Instructions 02/06/2024

Documents on TVA Form NPG-SPP-09.7-8

Resulting from

Inspection

71111.21N.04 Corrective Action CR 1908261 2024 ARD NRC Inspection - Cracks on the 02/06/2024

Documents Chemistry Weather Shielding Structure

Resulting from

Inspection

71111.21N.04 Corrective Action CR 1908491 2024 ARD Inspection - System Peer Team to 02/07/2024

Documents Evaluate for Enhancement to NPG-SPP-09.0.1.1

Resulting from

Inspection

71111.21N.04 Corrective Action CR 1908826 2024 NRD ARD Inspection Minor Violation: failure 02/08/2024

Documents to document anomaly during maintenance

Resulting from

Inspection

71111.21N.04 Drawings 1-45W760-268-1 Wiring Diagram Permanent Hydrogen Mitigation Rev. 3

Sys Schematic Diagrams

71111.21N.04 Drawings 1-47W866-2 Flow Diagram Heating, Cooling & Ventilation Air Rev. 28

Flow

71111.21N.04 Drawings 193-3442-15 Final Assembly Hydrogen Ignitor Rev. NC

71111.21N.04 Drawings 2-45W2772-7 Wiring Diagrams 480V Cont & Aux BLDG Vent BD Rev. 2

2B1-B Connection Diagrams

71111.21N.04 Drawings 2-45W2772-7 Wiring Diagrams 480V Cont & Aux BLDG Vent BD Rev. 0

2A1-A Connection Diagrams

71111.21N.04 Drawings 2-45W760-268-1 Wiring Diagram Permanent Hyd Mitigation Sys Rev. 4

Schematic Diagrams

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.21N.04 Drawings 6947D02 480V DS Switchgear Rev. 901

71111.21N.04 Drawings RB122225 Outline of Induction Motor M/C Size - T4007J - Rev. 901

(Special) 2 Pole

71111.21N.04 Drawings RB12225 Outline of Induction Motor Rev. G

71111.21N.04 Drawings SDD-N3-30AB-4001 Auxiliary Building Heating, Ventilation, Air Rev. 45

Conditioning System (30, 31, 44) Unit 1 / Unit 2

71111.21N.04 Engineering DG-M6.3.3 Raw Water Systems: General Design of Essential Rev. 3

Evaluations Raw Cooling Water Systems

71111.21N.04 Engineering WO 121342816 Evaluation of Watts Bar Unit 2 Thermal Sleeve ID Rev. 0

Evaluations and OD Wear Condition and Recommendations

71111.21N.04 Engineering WO 124103289 Evaluation of Watts Bar Unit 2 Thermal Sleeve ID Rev. 0

Evaluations and OD Wear Condition and Recommendations

71111.21N.04 Miscellaneous 067 System Walkdown Quarter 1 System Walkdown Checklist for ERCW 03/16/2023

Q1 2023

71111.21N.04 Miscellaneous 067 System Walkdown Quarter 2 System Walkdown Checklist for ERCW 06/28/2023

Q2 2023

71111.21N.04 Miscellaneous 067 System Walkdown Quarter 3 System Walkdown Checklist for ERCW 09/25/2023

Q3 2023

71111.21N.04 Miscellaneous 067 System Walkdown Quarter 4 System Walkdown Checklist for ERCW 12/19/2023

Q4 2023

71111.21N.04 Miscellaneous 7043291 TVA Receiving Report PO Number: 7043291-1 10/01/2021

71111.21N.04 Miscellaneous Final Report FMRC J.I. Hydrogen Combustion Initiated By A Tayco Igniter 08/1/1984

0J1R5. RU 070 (A) in a Spray Environment Part 1: Test Program

Description

71111.21N.04 Miscellaneous Lab Unit ID 2-MTR-3-128 Oil Sampling Report P1 - AUX FEED WATER 8/8/2022

PUMP MOTOR 2B

71111.21N.04 Miscellaneous LTR-NRC-18-34 Notification of the Potential Existence of Defects 05/28/2018

Pursuant to 10 CFR Part 21

71111.21N.04 Miscellaneous Tayco Qualification TAYCO ENGINEERING, INC. HYDROGEN 3/7/2002

Summary Report # QAR-IGNITER ASSEMBLY Tayco P/N: 193-3442-15,

2375 Dated

71111.21N.04 Miscellaneous WBN-VTD-P014-0030 Pacific Air Products Instructions for the installations Rev. 3

of Dampers

71111.21N.04 Miscellaneous WBN-VTD-P076-0030 OPERATING AND MAINTENANCE Rev. 7

Inspection Type Designation Description or Title Revision or

Procedure Date

INSTRUCTIONS FOR PARSON-PEEBLES

INDUCTION MOTORS. (PUB. # GCM/254924)

71111.21N.04 Miscellaneous WBN-VTD-R165-0030 Reliance Installation and Maintenance Instructions Rev. 7

for Life-Line T Motors, Type S, Type T, and Type N

71111.21N.04 Miscellaneous WBN-VTD-W120-3022 Westinghouse Nuclear Safety-Related Low Voltage Rev. 5

Power Circuit Breakers and Cell Parts Types DS

and DLS

71111.21N.04 Miscellaneous WBN-VTD-W120-3023 Westinghouse MPM-DS Breaker Maintenance Rev. 18

Program Manual for Safety-Related Type DS Low

Voltage Metal Enclosed Switchgear

71111.21N.04 Operability CDE-1396 Operability Determination Document for 1-HTR-10-15-2015

Evaluations 268-0002

71111.21N.04 Operability CDE-1570 Operability Determination Document for 2-HTR-4-13-2017

Evaluations 268-0022

71111.21N.04 Operability CDE-1625 Operability Determination Document for 2-HTR-3-27-2019

Evaluations 268-0048

71111.21N.04 Operability CDE-1635 Operability Determination Document for 2-HTR-5-7-2019

Evaluations 268-0047

71111.21N.04 Operability CDE-1678 Operability Determination Document for 1-BKR-6-9-2020

Evaluations 268-0002/16B

71111.21N.04 Operability CDE-1712 Operability Determination Document for 2-HTR-5-7-2019

Evaluations 268-0029

71111.21N.04 Operability CDE-1713 Operability Determination Document for 2-HTR-11-12-2020

Evaluations 268-0003

71111.21N.04 Operability CDE-1714 Operability Determination Document for 2-HTR-11-12-2020

Evaluations 268-0031

71111.21N.04 Procedures 0-CM-1.08 Raw Water Strategic Plan Rev. 0005

71111.21N.04 Procedures 0-MI-57.002 Westinghouse DS Circuit Breaker Routine Rev. 16

Maintenance, Inspection, and Testing

71111.21N.04 Procedures 0-MI-57.108 Insulation Resistance and Continuity Tests for Rev. 13

Rotating Machinery, Valves, Cables, Buses and

Transformers

71111.21N.04 Procedures 0-MI-67.001 Removal, Inspection, and Repair of Essential Raw Rev. 0000

Cooling Water Pumps

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.21N.04 Procedures 0-SI-31-31-A Control Room Emergency Air Temperature Control Rev. 14

System (CREATCS) Train A Operability Test

71111.21N.04 Procedures 0-TI-109 Breaker Testing and Maintenance Program Rev. 7

71111.21N.04 Procedures 0-TI-31.02 Plant Equipment Vibration Monitoring & Vibration Revision

Diagnostics Program 0003

71111.21N.04 Procedures 1-SI-268-1-A PERMANENT HYDROGEN MITIGATION Revision

SYSTEM TRAIN A IGNITER AVAILABILITY TEST 0008

71111.21N.04 Procedures 1-SI-268-1-B PERMANENT HYDROGEN MITIGATION Revision

SYSTEM TRAIN B IGNITER AVAILABILITY TEST 0008

71111.21N.04 Procedures 1-SI-268-2-A Permanent Hydrogen Mitigation System Train A Revision

Operability Test 0008

71111.21N.04 Procedures 1-SI-268-2-B Permanent Hydrogen Mitigation System Train B Revision

Operability Test 0008

71111.21N.04 Procedures 1-TRI-0-10.3 Unit 1 ASME Section XI ISI/NDE Program Third Rev. 12

Interval

71111.21N.04 Procedures 16-PAR-WBN Maintenance Rule Program Rev. o

71111.21N.04 Procedures 2-SI-268-1-A PERMANENT HYDROGEN MITIGATION Revision

SYSTEM TRAIN A IGNITER AVAILABILITY TEST 0004

71111.21N.04 Procedures 2-SI-268-1-B PERMANENT HYDROGEN MITIGATION Revision

SYSTEM TRAIN B IGNITER AVAILABILITY TEST 0005

71111.21N.04 Procedures 2-SI-268-2-A Permanent Hydrogen Mitigation System Train A Revision

Operability Test 0005

71111.21N.04 Procedures 2-SI-268-2-B Permanent Hydrogen Mitigation System Train B Revision

Operability Test 0006

71111.21N.04 Procedures 2-SI-3-901-B Motor Driven Auxiliary Feedwater Pump 2B-B Revision

Quarterly Performance Test 0018

71111.21N.04 Procedures 2-SI-3-901-B Motor Driven Auxiliary Feedwater Pump 2B-B Revision

Quarterly Performance Test 0018

71111.21N.04 Procedures 2-SI-3-923-B Auxiliary Feedwater Pump 2B-B Comprehensive Revision

Pump Test 0019

71111.21N.04 Procedures 2-SOI-268.01 Permanent Hydrogen Mitigation System Revision

0002

71111.21N.04 Procedures 2-TRI-0-10.1 ASME Section XI ISI/NDE Program Rev. 9

71111.21N.04 Procedures 2-TRI-0-2 Periodic Testing of Penetration Overcurrent Rev. 4

Inspection Type Designation Description or Title Revision or

Procedure Date

Protection 480V Circuit Breakers

71111.21N.04 Procedures CM 11.91 Total Residual Oxidant and Free Available Oxidant Rev. 0001

By Hach Pocket Colorimeter II

71111.21N.04 Procedures CM-3.01 System Chemistry Specifications Rev. 0137

71111.21N.04 Procedures CM-6.12 ERCW, RCW, and CCW Sampling Rev. 0003

71111.21N.04 Procedures FMS-Motor-2 Fleet Maintenance Strategy Motor-Low Voltage Rev. 1

71111.21N.04 Procedures MI-56.007 Westinghouse Safety-Related DS Circuit Breaker Rev. 1

Overhaul Maintenance, Inspection, and Testing

71111.21N.04 Procedures NPG-SPP-09.0.1 Conduct of Systems Engineering and Equipment Rev. 0013

Reliability

71111.21N.04 Procedures NPG-SPP-09.0.1.1 System Monitoring and Trending Rev. 0010

71111.21N.04 Procedures NPG-SPP-09.14 Generic Letter (GL) 89-13 Implementation Rev. 0006

71111.21N.04 Procedures NPG-SPP-09.7 Corrosion Control Program Rev. 0009

71111.21N.04 Procedures NPG-SPP-09.7.1 Corrosion Control - General, Localized and Rev. 0006

Galvanic, and Stress Corrosion Control Cracking

Program

71111.21N.04 Procedures NPG-SPP-09.7.3 Raw Water Corrosion Program Rev. 0005

71111.21N.04 Procedures PM #: M6771V Lube Oil Sampling Of Motor Driven Auxiliary Feed Rev. 11

Water Pump Motors

71111.21N.04 Procedures PM 610031003 Bridge and Meggering for 480V Class 1E Motors Rev. 2

and Cable Condition Monitoring

71111.21N.04 Procedures PM M6318V Lubrication, Cleaning and Inspection of Rev. 3

Westinghouse Medium AC Motors

71111.21N.04 Procedures SDD-N3-3B-4002 AUXILIARY FEEDWATER SYSTEM Rev. 0034

71111.21N.04 Procedures SDD-N3-83-4001 COMBUSTIBLE GAS CONTROL SYSTEM Rev. 0013

71111.21N.04 Procedures TVA-NQA-PLN89-A Nuclear Quality Assurance Plan Rev. 0042

71111.21N.04 Procedures WBN IPP PLAN (ECM-8) Watts Bar Nuclear Plant: Integrated Pollution Rev. 37

Prevention (IPP) Plan and Spill Response Plan

71111.21N.04 Shipping Records 7456673 Batch-LL13A19721 05/04/2022

71111.21N.04 Shipping Records G9150-2-065EQ LUBRICANT, OIL, QA 2, DRUM, FAMILY, 10/7/2021

TURBINE OIL 46 INDUSTRY GRADE ISO VG-46,

TURBINE OIL, TVA CODE STO-2 / HTO-2

71111.21N.04 Work Orders WO 111412275,

111984041, 112604458,

Inspection Type Designation Description or Title Revision or

Procedure Date

116002096, 119467471,

119623179, 121467934,

21491782, 121491783,

21775913, 121878090,

21878091, 121951060,

2220778, 122610257,

2744165, 122744186,

2875135, 122875181,

2942239, 122942360,

23179448, 123187912,

23188000, 123220607,

23220875, 123304942,

24047203, 124131946

11