ML26064A235
| ML26064A235 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 03/05/2026 |
| From: | Walker M South Texas |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| NOC-AE-26004145, STI: 35842638 | |
| Download: ML26064A235 (0) | |
Text
March 05, 2026 NOC-AE-26004145 10 CFR 50.55a STI: 35842638 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 South Texas Project Unit 2 Docket No. STN 50-499 Inservice Inspection Summary Report - 2RE24 Attached is the South Texas Project Electric Generating Station Unit 2 summary report for inservice inspections performed prior to and during scheduled refueling outage 2RE24 completed in November 2025. This summary report satisfies the reporting requirements of American Society of Mechanical Engineers ASME Code Section XI, Article IWA-6230.
There are no commitments in this letter.
If there are any questions regarding this report, please contact Zachary Dibbern at 361-972-4336 or me at 361-972-8352.
Mark Walker Director Plant Engineering
Enclosure:
Summary Report for the 2RE24 Inservice Inspection of Unit 2 South Texas Project Electric Generating Station cc:
Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 1600 E. Lamar Boulevard Arlington, TX 76011-4511 Chief Inspector Texas Department of Licensing and Regulation Boiler Program P.O. Box 12157 Austin, TX 78711 Docusign Envelope ID: A6BAB4AB-173A-4F57-ADC6-092449C840A9
SUMMARY
REPORT for the 2RE24 INSERVICE INSPECTION of UNIT 2 SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION STP NUCLEAR OPERATING COMPANY Fall 2025 Docusign Envelope ID: 5F00FB99-2704-4665-A68A-74273284D1D4 Docusign Envelope ID: A6BAB4AB-173A-4F57-ADC6-092449C840A9
COVER SHEET 2RE24 INSERVICE INSPECTION
SUMMARY
REPORT SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION, UNIT 2 P.O. BOX 289 WADSWORTH, TEXAS 77483 USNRC DOCKET NO: 50-499 OPERATING LICENSE NO: NPF-80 COMMERCIAL OPERATION DATE: June 19, 1989 Prepared by: ___________________________________ Date ___________
James Williams, ISI Program Owner Reviewed by: ___________________________________ Date__ _
Robert Berg, Supervisor, Testing / Programs Docusign Envelope ID: 5F00FB99-2704-4665-A68A-74273284D1D4 3/5/2026 3/5/2026 Docusign Envelope ID: A6BAB4AB-173A-4F57-ADC6-092449C840A9
SCOPE COMPONENT SUPPORTS, WELDS, THERMAL FATIGUE, REPAIR/REPLACEMENT, AND SYSTEM PRESSSURE TESTING INSPECTION PROGRAMS (IWB, IWC, IWD, IWE, IWF)
The examinations summarized in this report were performed in accordance with the 2013 Edition of the ASME Code,Section XI that is applicable to the South Texas Project, Unit 2 fourth ten-year interval (09/25/2020-09/08/2029), Second period (09/25/2023-09/24/2026). This report covers selected ASME Code Class 1, 2, and 3 Systems/Components. This report is documented in accordance with the requirements of ASME Section XI Code Case N-532-5.
Examinations and tests required by the Code are scheduled in accordance with "Inspection Program B" as defined in IWB-2412 for ASME Code Class 1 Systems/Components, IWC-2412 for ASME Code Class 2 Systems/Components, IWD-2412 for ASME Code Class 3 Systems/Components, and IWF-2410 component supports.
ASME Code Class 1 components were examined as prescribed by Table IWB-2500-1 and the applicable Examination Categories, which established the examination frequency at each refueling outage. The ASME Code Class 2 Systems/Components were examined in accordance with Table IWC-2500-1, Examination Categories. The ASME Code Class 3 Systems/Components were examined in accordance with Table IWD-2500-1, Examination Categories. Component Supports were examined in accordance with IWF-Table 2500-1, Examination Categories.
Docusign Envelope ID: 5F00FB99-2704-4665-A68A-74273284D1D4 Docusign Envelope ID: A6BAB4AB-173A-4F57-ADC6-092449C840A9
FORM OAR-1 OWNERS ACTIVITY REPORT (Code Case N-532-5)
Report Number OAR-2RE24 Plant South Texas Project Electric Generating Station Unit No.2 Commercial service date June 19, 1989 Refueling outage no. 2RE24 (if applicable)
Applicable inspection interval IWB, IWC, IWD, IWF - 4th_; IWE -4th (1st, 2nd, 3rd, 4th, other)
Applicable inspection period IWB, IWC, IWD, IWF - 2nd (1st, 2nd, 3rd)
Edition and Addenda of Section XI applicable to the inspection plans 2013 Edition Date and revision of inspection plans September 25, 2022 / Revision 11 Edition and Addenda of Section XI applicable to repair/replacement activities, if different than the inspection plans N/A Code Cases used for inspection and evaluation:
N-532-5, N-593-2, N-716-1, N-729-6, N-770-5, N-722-1 (if applicable)
CERTIFICATE OF CONFORMANCE I certify that (a) the statements made in this report are correct; (b) the examinations and tests meet the Inspection Plan as required by the ASME Code,Section XI; and (c) the repair/replacement activities and evaluations supporting the completion of 2RE24 conform to the requirements of the ASME Code,Section XI.
(refueling outage number)
Signed Date ____________________
(Owner or Owners Designee, Title)
CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and employed by Bureau Veritas Inspection and Insurance Company of Lynn, Massachusetts have inspected the items described in this Owners Activity Report and state that, to the best of my knowledge and belief, the Owner has performed all activities represented by this report in accordance with the requirements of the ASME Code,Section XI.
By signing this certificate, neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the repair/replacement activities and evaluations described in this report. Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damage or loss of any kind arising from or connected with this inspection.
Commission NB12442 (Inspectors Signature)
(National Board Number and Endorsement)
Date (07/15)
Docusign Envelope ID: 5F00FB99-2704-4665-A68A-74273284D1D4 3/5/2026 3/5/2026 Docusign Envelope ID: A6BAB4AB-173A-4F57-ADC6-092449C840A9
1 Table 1 Items With Flaws or Relevant Conditions That Required Evaluation for Continued Service 2RE24 Fall 2025 ASME Category Item Number Item Description Evaluation Description F-A F1.30C Rigid restraint in Component Cooling Water System CR 25-8940, Evaluation: EV-2025-001 No space identified between pipe piece and side beam. Evaluation deemed this acceptable.
F-A F1.20C Spring hanger in Feedwater System CR 25-9557, Evaluation: EV-2025-002 Nameplate information on spring hanger was incorrect, however, the as-found condition and loading condition is Code compliant.
F-A F1.20C Spring hanger in Auxiliary Feedwater System CR 25-9424, Evaluation: EV-2025-003 Spring hanger found out of tolerance. Evaluation deemed the variability factor to be within allowable limits.
Docusign Envelope ID: 5F00FB99-2704-4665-A68A-74273284D1D4 Docusign Envelope ID: A6BAB4AB-173A-4F57-ADC6-092449C840A9
TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE 1
Class Corrective Measure Item Description System Description of Work Date Completed Repair/Replacement Plan 3
REPLACEMENT THERMOWELL ESSENTIAL COOLING WATER REPLACED THERMOWELL 12/9/2025 2-23-036 3
REPLACEMENT PIPING, FLANGE ESSENTIAL COOLING WATER CUT AND REALIGNED PIPING AND FLANGE 12/9/2025 2-23-048 3
REPLACEMENT VALVE ESSENTIAL COOLING WATER REPLACED VALVE 1/7/2026 2-23-051 3
REPLACEMENT VALVE ESSENTIAL COOLING WATER REPLACED VALVE 1/7/2026 2-23-052 3
REPLACEMENT PIPING ESSENTIAL COOLING WATER REPLACED PIPING AND COUPLING 12/9/2025 2-24-014 3
REPLACEMENT PIPING ESSENTIAL COOLING WATER REPLACED PIPING AND COUPLING 12/10/2025 2-24-015 3
REPLACEMENT PIPING AND FITTINGS ESSENTIAL COOLING WATER REPLACED PIPING AND FITTINGS 12/9/2025 2-24-016 3
REPLACEMENT PIPING ESSENTIAL COOLING WATER REPLACED PIPING 12/10/2025 2-24-028 3
REPLACEMENT PIPING ESSENTIAL COOLING WATER REPLACED PIPING 12/10/2025 2-24-032 3
REPLACEMENT PIPING ESSENTIAL COOLING WATER REPLACED PIPING 12/10/2025 2-24-034 3
REPLACEMENT PIPING ESSENTIAL COOLING WATER REPLACED PIPING 12/9/2025 2-24-038 3
REPLACEMENT THERMOWELL ESSENTIAL COOLING WATER REPLACED THERMOWELL 12/10/2025 2-25-003 3
REPLACEMENT THERMOWELL ESSENTIAL COOLING WATER REPLACED THERMOWELL 12/9/2025 2-25-004 3
REPLACEMENT THERMOWELL ESSENTIAL COOLING WATER REPLACED THERMOWELL 12/10/2025 2-25-007 3
REPLACEMENT THERMOWELL ESSENTIAL COOLING WATER REMOVED AND REINSTALLED THERMOWELL 1/6/2026 2-25-014 3
REPLACEMENT PIPING ESSENTIAL COOLING WATER REPLACED PIPING 11/12/2025 2-25-016 2
REPLACEMENT VALVE RESIDUAL HEAT REMOVAL REPLACED VALVE 1/6/2026 2-25-020 3
REPLACEMENT PIPING ESSENTIAL COOLING WATER REPLACED PIPING 11/11/2025 2-25-029 3
REPLACEMENT VALVE ESSENTIAL COOLING WATER REPLACED VALVE 12/10/2025 2-25-035 Docusign Envelope ID: 5F00FB99-2704-4665-A68A-74273284D1D4 Docusign Envelope ID: A6BAB4AB-173A-4F57-ADC6-092449C840A9
TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE 2
Class Corrective Measure Item Description System Description of Work Date Completed Repair/Replacement Plan 3
REPLACEMENT PIPING ESSENTIAL COOLING WATER REPLACED PIPING 12/9/2025 2-25-043 2
REPLACEMENT PSV SPRING MAIN STEAM REPLACED SPRING 12/4/2025 2-25-048 2
REPLACEMENT PSV SPRING MAIN STEAM REPLACED SPRING 1/6/2026 2-25-049 2
REPLACEMENT PSV SPRING MAIN STEAM REPLACED SPRING 12/9/2025 2-25-052 2
REPLACEMENT PSV SPRING MAIN STEAM REPLACED SPRING 12/9/2025 2-25-053 2
REPLACEMENT PSV SPRING MAIN STEAM REPLACED SPRING 12/9/2025 2-25-054 2
REPLACEMENT PSV SPRING MAIN STEAM REPLACED SPRING 12/4/2025 2-25-055 3
REPLACEMENT VALVE INTERNAL PARTS ESSENTIAL COOLING WATER REPLACED INTERNAL CHECK VALVE PLATES 11/11/2025 2-25-064 2
REPLACEMENT VALVE INTERNAL PARTS CHEMICAL VOLUME AND CONTROL REPLACED VALVE PLUG AND STEM 1/6/2026 2-25-068 1
INSPECTION VALVE INTERNAL PARTS REACTOR COOLANT DISASSEMBLED AND INSPECTED VALVE INTERNALS 1/7/2026 2-25-075 1
INSPECTION VALVE INTERNAL PARTS REACTOR COOLANT DISASSEMBLED AND INSPECTED VALVE INTERNALS 1/7/2026 2-25-076 1
INSPECTION VALVE INTERNAL PARTS REACTOR COOLANT DISASSEMBLED AND INSPECTED VALVE INTERNALS 1/7/2026 2-25-077 1
REPLACEMENT PUMP SEAL ASSEMBLY REACTOR COOLANT REPLACED SEAL ASSEMBLY AND CARTRIDGE 1/8/2026 2-23-003 1
REPLACEMENT VALVE REACTOR COOLANT REPLACED VALVE 1/7/2026 2-23-006 3
REPLACEMENT PIPING STANDBY DIESEL GENERATOR REPLACED PIPING 1/12/2026 2-23-030 3
REPLACEMENT PIPING ESSENTIAL COOLING WATER REPLACED PIPING 1/13/2026 2-23-034 3
REPLACEMENT PIPING ESSENTIAL COOLING WATER REPLACED PIPING 1/13/2026 2-23-035 3
REPAIR VALVE ESSENTIAL COOLING WATER REPAIRED VALVE INTERNALS 1/8/2026 2-24-013 2
REPAIR VALVE TAPER PINS COMPONENT COOLING WATER WELDED VALVE TAPER PINS 1/16/2026 2-24-031 3
REPLACEMENT PIPING ESSENTIAL COOLING WATER REPLACED PIPING 1/13/2026 2-24-036 1
REPLACEMENT PUMP SEAL ASSEMBLY REACTOR COOLANT REPLACED SEAL ASSEMBLY 1/8/2026 2-24-039 3
REPLACEMENT VALVE COMPONENT COOLING WATER REPLACED VALVE 1/7/2026 2-25-002 Docusign Envelope ID: 5F00FB99-2704-4665-A68A-74273284D1D4 Docusign Envelope ID: A6BAB4AB-173A-4F57-ADC6-092449C840A9
TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE 3
Class Corrective Measure Item Description System Description of Work Date Completed Repair/Replacement Plan 2
REPLACEMENT PIPING FEEDWATER REPLACED PIPING 1/8/2026 2-25-010 1
REPLACEMENT PUMP SEAL ASSEMBLY REACTOR COOLANT REPLACED SEAL ASSEMBLY 1/8/2026 2-25-015 3
REPAIR SELF-CLEANING STRAINER ESSENTIAL COOLING WATER REALIGNED SELF-CLEANING STRAINER 1/12/2026 2-25-028 2
MODIFICATION VENT VALVE SAFETY INJECTION INSTALLED VENT VALVE 1/13/2026 2-25-044 2
MODIFICATION VENT VALVE SAFETY INJECTION INSTALLED VENT VALVE 1/8/2026 2-25-045 2
REPLACEMENT PSV SPRING MAIN STEAM REPLACED SPRING 1/12/2026 2-25-050 2
REPLACEMENT PSV SPRING MAIN STEAM REPLACED SPRING 1/12/2026 2-25-051 2
REPLACEMENT PSV SPRING MAIN STEAM REPLACED SPRING 1/13/2026 2-25-056 2
REPLACEMENT PSV SPRING MAIN STEAM REPLACED SPRING 1/13/2026 2-25-057 3
REPLACEMENT FLANGE FASTENERS ESSENTIAL CHILLED WATER REPLACED FASTENERS 1/8/2026 2-25-058 3
REPLACEMENT RCP MOTOR AND AIR COOLERS REACTOR COOLANT REPLACED RCP MOTOR AND AIR COOLERS 1/13/2026 2-25-067 3
REPAIR PIPING ESSENTIAL COOLING WATER PERFORMED WELD BUILD UP 1/8/2026 2-25-070 3
REPLACEMENT PIPING AND FITTINGS ESSENTIAL COOLING WATER REPLACED PIPING AND FITTINGS 1/8/2026 2-25-071 3
REPLACEMENT PIPING AND FITTINGS ESSENTIAL COOLING WATER REPLACED PIPING AND FITTINGS 1/8/2026 2-25-072 2
REPLACEMENT VALVE TRIM SET CHEMICAL VOLUME AND CONTROL REPLACED VALVE TRIM SET 1/7/2026 2-25-074 1
REPLACEMENT VALVE INTERNAL PARTS REACTOR COOLANT REPLACED VALVE INTERNALS 1/7/2026 2-25-078 1
REPAIR VALVE BODY TO BONNET CHEMICAL VOLUME AND CONTROL PERFORMED SEAL WELD 1/13/2026 2-25-080 3
REPLACEMENT PIPING AND FITTINGS ESSENTIAL COOLING WATER REPLACED PIPING AND FITTINGS 1/8/2026 2-25-081 3
REPLACEMENT PIPING AND FITTINGS ESSENTIAL COOLING WATER REPLACED PIPING AND FITTINGS 1/8/2026 2-25-082 3
REPAIR PIPING ESSENTIAL COOLING WATER PERFORMED WELD BUILD UP 1/8/2026 2-25-083 1
REPLACEMENT PUMP SEAL ASSEMBLY REACTOR COOLANT REPLACED PUMP SEAL ASSEMBLY 1/8/2026 2-25-085 3
REPLACEMENT VALVE INTERNAL PARTS ESSENTIAL COOLING WATER REPLACED VALVE INTERNALS 2/3/2026 2-25-062 Docusign Envelope ID: 5F00FB99-2704-4665-A68A-74273284D1D4 Docusign Envelope ID: A6BAB4AB-173A-4F57-ADC6-092449C840A9
TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE 4
Docusign Envelope ID: 5F00FB99-2704-4665-A68A-74273284D1D4 Docusign Envelope ID: A6BAB4AB-173A-4F57-ADC6-092449C840A9