ML23044A619

Summary Report for Inservice Inspection (2RE22) Completed in November 2022

ML23044A619
Person / Time
Site:	South Texas
Issue date:	02/13/2023
From:	Georgeson C South Texas
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
NOC-AE-23003937
Download: ML23044A619 (1)

Text

February 13, 2023 NOC-AE-23003937 10 CFR 50.55a STI: 35423738 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 - 2RE22 Attached is the South Texas Project Electric Generating Station Unit 2 summary report for inservice inspections performed prior to and during scheduled refueling outage 2RE22 completed in November 2022. 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 361-972-7806.

Digitally signed by C. H.

C. H. Georgeson Georgeson Date: 2023.02.13 16:46:23 -06'00' C. H. Georgeson General Manager, Engineering

Enclosure:

Summary Report for the 2RE22 Inservice Inspection of Unit 2 South Texas Project Electric Generating Station

NOC-AE-23003937 Page 2 of 2 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 Dennis Galvin Project Manager U.S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Division of Operating Reactor Licensing Licensing Project Branch 4 Gregory Kolcum Senior Resident Inspector, South Texas Project U.S. Nuclear Regulatory Commission Chad Stott Resident Inspector, South Texas Project U.S. Nuclear Regulatory Commission

SUMMARY

REPORT for the 2RE22 INSERVICE INSPECTION of UNIT 2 SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION STP NUCLEAR OPERATING COMPANY Fall 2022

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), first period (09/25/2020-09/24/2023). 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.

TABLE 1 ITEMS WITH FLAWS OR RELEVANT CONDITIONS THAT REQUIRE EVALUATION FOR CONTINUED SERVICE 2RE22 FALL 2022 ASME Item Item Evaluation Description Category Number Description CC-LINER-MB-1 During Inservice visual Inspection of Containment E-A E1.30 CONTAINMENT LINER liner at the RCB -11Summary #: 2CISI-901000, ISI PLATE (240-360 DEG) Drawing Number: CISI-2000-03. Linear indication of approximately 59 in length identified at the moisture barrier location, and approximately 335 to 340 tearing was found in the coating/grouting moisture barrier boundary. CR# 22-10588 1

TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE REPAIR/REPLACEMENT Class CORRECIVE MEASURE ITEM DESCRIPTION System DESCRIPTION OF WORK Date Completed PLAN RESIDUAL HEAT 1 REPAIR VALVE REMOVAL REMOVED WELD. 12/7/2022 2-17-032 ESSENTIAL COOLING REPLACED FLANGE AND 3 REPLACEMENT FLANGE WATER WELD-O-LET. 12/14/2022 2-20-033 ESSENTIAL COOLING REPLACED FLANGE AND 3 REPLACEMENT FLANGE WATER WELD-O-LET. 12/14/2022 2-20-034 ESSENTIAL REPLACED COOLING THERMOWELL AND SOL 3 REPLACEMENT THERMOWELL WATER 12/13/2022 2-21-004 COMPONENT COOLING 2 REPLACEMENT VALVE REPLACED VALVE. 12/14/2022 2-21-008 ESSENTIAL COOLING 3 REPLACEMENT VALVE WATER REPLACED PLUGS. 12/13/2022 2-21-009 ESSENTIAL COOLING 3 REPLACEMENT FLANGE WATER REPLACED FLANGE 12/14/2022 2-21-012 ESSENTIAL COOLING 3 REPLACEMENT FLANGE WATER REPLACED FLANGE 12/14/2022 2-21-013 ESSENTIAL COOLING 3 REPLACEMENT VALVE WATER REPLACED PLATES. 12/13/2022 2-21-016 COMPONENT REPLACED PIN COOLING 2 REPLACEMENT VALVE RETAINERS. 12/13/2022 2-21-019 ESSENTIAL COOLING REPAIRED FLANGE AND 3 REPAIR FLANGE AND PIPE WATER PIPE. 12/14/2022 2-21-025 1

TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE REPAIR/REPLACEMENT Class CORRECIVE MEASURE ITEM DESCRIPTION System DESCRIPTION OF WORK Date Completed PLAN ESSENTIAL COOLING REPAIRED FLANGE AND 3 REPAIR FLANGE AND PIPE WATER PIPE. 12/14/2022 2-21-026 ESSENTIAL COOLING REPLACED PLUGS AND 3 REPLACEMENT VALVE WATER STUDS. 12/6/2022 2-21-029 REACTOR COOLANT 1 REPAIR VALVE REMOVED VALVE. 12/7/2022 2-21-030 REACTOR COOLANT 1 REPLACEMENT VALVE INSTALLED VALVE. 12/8/2022 2-21-031 CHEMICAL VOLUME 2 REPLACEMENT VALVE CONTROL REPLACED DISC. 12/7/2022 2-21-034 RESIDUAL HEAT 2 REPLACEMENT VALVE REMOVAL REPLACED VALVE. 12/14/2022 2-22-002 ESSENTIAL COOLING REPLACED PUMP AND 3 REPLACEMENT PUMP WATER BOLTING. 12/14/2022 2-22-008 STEAM REMOVED/REINSTALLED 2 REPAIR STEAM GENERATOR GENERATOR HATCH. 12/7/2022 2-22-017 STEAM REMOVED/REINSTALLED 2 REPAIR STEAM GENERATOR GENERATOR HATCH. 12/14/2022 2-22-018 STEAM REMOVED/REINSTALLED 2 REPAIR STEAM GENERATOR GENERATOR DIAPRAGMS. 12/14/2022 2-22-019 REACTOR COOLANT REPLACED PLUG, SEAT, 4 REPLACEMENT VALVE CAGE, AND SOLENOID. 1/10/2023 2-22-023 2

TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE REPAIR/REPLACEMENT Class CORRECIVE MEASURE ITEM DESCRIPTION System DESCRIPTION OF WORK Date Completed PLAN REPLACED CARTRIDGE REACTOR SEAL PACKAGE AND COOLANT 1 REPLACEMENT PUMP SEAL. 12/6/2022 2-22-024 REACTOR REMOVED/REINSTALLED COOLANT 1 REPAIR VALVE VALVE. 12/13/2022 2-22-025 REACTOR REMOVED/REINSTALLED COOLANT 1 REPAIR VALVE VALVE. 12/13/2022 2-22-026 REACTOR COOLANT 1 REPLACEMENT PIPE REPLACED PIPE. 12/7/2022 2-22-027 ESSENTIAL COOLING REPLACED EXPANSION 3 REPLACEMENT EXPANSION JOINT WATER JOINT. 12/8/2022 2-22-028 REPLACED BEARING OIL REACTOR COOLANT COOLER AND MOTOR 3 REPLACEMENT MOTOR AIR COOLERS. 1/10/2023 2-22-030 ESSENTIAL COOLING 3 REPLACEMENT STRAINER WATER REPLACED FASTENERS. 12/8/2022 2-22-031 ESSENTIAL COOLING 3 REPLACEMENT PIPE WATER REPLACED PIPE. 12/14/2022 2-22-032 REACTOR TEMPERATURE REPLACED COOLANT 1 REPLACEMENT ELEMENT THERMOWELL. 1/10/2023 2-22-034 STEAM GENERATOR 2 REPLACEMENT SNUBBER BLOWDOWN REPLACED SNUBBER 12/8/2022 2-22-037 INSTRUMENT 2 REPLACEMENT VALVE AIR REPLACED STUDS. 12/7/2022 2-22-039 3

TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE REPAIR/REPLACEMENT Class CORRECIVE MEASURE ITEM DESCRIPTION System DESCRIPTION OF WORK Date Completed PLAN REACTOR COOLANT 1 REPLACEMENT SNUBBER REPLACED SNUBBER. 12/8/2022 2-22-040 STEAM 2 REPLACEMENT STEAM GENERATOR GENERATOR REPLACED FASTENERS. 12/7/2022 2-22-041 FEEDWATER 2 REPLACEMENT SNUBBER REPLACED SNUBBER 12/13/2022 2-22-042 CONTAINMENT BUILDING & REMOVED/REINSTALLED 2 REPAIR VALVE MSIV CUBICLE WELD. 12/6/2022 2-22-044 4