NOC-AE-21003819, Inservice Inspection Summary Report - 2RE21

Inservice Inspection Summary Report - 2RE21

ML21196A492
Person / Time
Site:	South Texas
Issue date:	07/15/2021
From:	Georgeson C South Texas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NOC-AE-21003819, STI:35187483
Download: ML21196A492 (10)

Text

Nuclear Operating Company South Texas Pmlcct Electric Generating Station P.O. Bos 289 Wadsnvrlh. Texas 77483 July 15,2021 NOC-AE-21003819 10CFR50.55a STI:35187483 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 - 2RE21 Attached is the South Texas Project Electric Generating Station Unit 2 summary report for inservice inspections performed prior to and during scheduled refueling outage 2RE21 completed in April 2021. This summary report satisfies the reporting requirements of American Society of Mechanical Engineers ASME Code Section Xl, Article IWA-6230.

There are no commitments in this letter.

If there are any questions regarding this report, please contact All Albaaj at (361) 972-8949 or me at (361) 972-7806.

'*H^

Chris Georgesor General Manager, Engineering aa

Enclosure:

Summary Report for the 2RE21 Inservice Inspection of Unit 2 South Texas Project Electric Generating Station ec:

Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 1600 East Lamar Boulevard Arlington, TX 76011-4511 Chief Inspector Texas Department of Licensing and Regulation Boiler Program P.O. Box 12157 Austin, TX 78711

SUMMARY

REPORT for the 2RE21 INSERVICE INSPECTION of UNIT 2 SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Nuclear Operating Company STP NUCLEAR OPERATING COMPANY Spring 2021

COVER SHEET 2RE21 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: Date5<S3w^31 Eric Lahtz^lSl^fbgram Owne Reviewed by: Date ^1^^\2\

Clay1'bn^B6nno(,Supe esting Programs

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 Xl 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 Xl 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 forASME 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 2RE21 SPRING 2021 ASME Item Item Evaluation Description Category Number Description F-A F1.20C MS-2001-HL5014:Main Inservice Inspection identified Spring Hangar MS-Steam Spring Hangar 2001-HL5014 setpoint out of tolerance per

[2-CS-224000] procedure.

[VTC-2021-016]

Corrective Action to perform Evaluation perASME Xl IWF-3122.3. Results determined Acceptable for Service at current setpoint.

[21-3514-2]

Work Order adjusted Spring Hangar back to original design setpoint.

[21-3514-1]

B-D B3.110 Safety Nozzle to Shell weld Historical: 2RE20 - Inservice Inspection identified an PRZ-2-N4C area of interest, requiring evaluation.

[Summary 2-WD-011000] [UT-2019-031]

Analytical Evaluation performed by Westinghouse determined indication is acceptable in accordance with IWB-3132.3 and IWB-3600. (applicable until 2RE22)

[LTR-SDA-19-095-P Rev 0] - [STI 34937975]

Re-examination scheduled for 2RE21 in accordance with IWB-2420(b) and (c).

Current: 2RE21 Examination found flaw did not increase in size.

[UT-2021-025]

Westinghouse Analytical Evaluation to accept condition for Life of Plant scheduled prior to 2RE22.

[CR-19-11865-8]

TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE CORRECTIVE ITEM DATE REPAIR / REPLACMENT CLASS SYSTEM DESCRIPTION OF WORK MEASURE DESCRIPTION COMPLETED PLAN AUXILIARY 3 REPLACEMENT VALVE Installed new by-pass body. 10/12/2020 2-18-019 FEEDWATER COMPONENT 2 REPAIR VALVE Reworked Spare valve. 11/1/2019 2-19-034 COOLING ESSENTIAL 3 REPLACEMENT VALVE COOLING Valve internals replaced. 2/12/2020 2-19-043 WATER ESSENTIAL Replaced packing fasteners, 3 REPLACEMENT STRAINER COOLING cover fasteners, back wash 1/24/2020 2-20-003 WATER arm/shat assembly.

ESSENTIAL 3 REPLACEMENT VALVE COOLING Replaced valve. 1/22/2020 2-20-004 WATER ESSENTIAL 3 REPLACEMENT FLANGE COOLING Replaced flange. 2/26/2020 2-20-005 WATER ESSENTIAL 3 REPLACEMENT VALVE COOLING Replace valve. 10/20/2020 2-20-007 WATER REACTOR 1 REPLACEMENT SEAL PACKAGE Replaced Seal Pkg 04/09/2021 2-20-009 COOLANT CHEMICAL 2 REPLACEMENT VALVE VOLUME Plug replaced. 4/4/2021 2-20-012 CONTROL 2 REPLACEMENT VALVE MAIN STEAM Plug replaced. 4/8/2021 2-20-017 ESSENTIAL 3 REPLACEMENT VALVE COOLING Replace valve. 2/27/2021 2-20-019 WATER CONTAINMENT Refurbished valve and return to 2 REPAIR VALVE 04/12/2021 2-20-021 HVAC warehouse.

REACTOR 1 REPLACEMENT VALVE Removed Old Valve. 4/3/2021 2-20-026 COOLANT

TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE CORRECTIVE ITEM DATE REPAIR / REPLACMENT CLASS SYSTEM DESCRIPTION OF WORK MEASURE DESCRIPTION COMPLETED PLAN REACTOR 1 REPLACEMENT VALVE Installed New Valve. 4/4/2021 2-20-027 COOLANT ESSENTIAL Thermowell not replaced.

3 REPAIR THERMOWELL 10/23/2020 2-20-030 COOLING WATER Welding repair performed.

ESSENTIAL 3 REPLACEMENT PIPE & FLANGE Spool replaced. 10/21/2020 2-20-031 COOLING WATER ESSENTIAL 3 REPLACEMENT THERMOWELL Thermowell replaced. 10/21/2020 2-20-032 COOLING WATER ESSENTIAL Removed flange from 3 REPAIR FLANGE 2/9/2021 2-20-035 COOLING WATER damaged spool.

ESSENTIAL Replaced valve with blind 3 REPLACEMENT VALVE 2/27/2021 2-20-036 COOLING WATER flange.

ESSENTIAL Replaced valve with blind 3 REPLACEMENT VALVE 2/27/2021 2-20-037 COOLING WATER flange.

ESSENTIAL Replaced valve with pipe 3 REPLACEMENT VALVE 2/27/2021 2-20-038 COOLING WATER spool.

ESSENTIAL 3 REPLACEMENT PIPE Replaced piping spool. 2/27/2021 2-20-039 COOLING WATER ESSENTIAL Replaced tee with straight 3 REPLACEMENT PIPE 2/27/2021 2-20-040 COOLING WATER piping.

ESSENTIAL 3 REPLACEMENT PIPE Piping Spool Replaced. 1/29/2021 2-20-041 COOLING WATER ESSENTIAL 3 REPLACEMENT FLANGE Replaced Flange. 2/27/2021 2-20-042 COOLING WATER CHEMICAL 3 REPLACEMENT TRANSMITTER Replaced transmitter. 12/6/2020 2-20-043 VOLUME CONTROL 3 REPLACEMENT VALVE DIESEL OIL Replaced valve. 1/29/2021 2-20-044 ESSENTIAL 3 REPLACEMENT VALVE Replaced valve. 2/22/2021 2-20-045 COOLING WATER ESSENTIAL 3 REPLACEMENT VALVE Replaced valve. 2/27/2021 2-20-046 COOLING WATER

TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE CORRECTIVE ITEM DATE REPAIR / REPLACMENT CLASS SYSTEM DESCRIPTION OF WORK MEASURE DESCRIPTION COMPLETED PLAN ESSENTIAL 3 REPLACEMENT VALVE Replaced valve. 2/27/2021 2-20-047 COOLING WATER ESSENTIAL Replaced spools, flanges, 3 REPLACEMENT PIPE & FLANGE 2/27/2021 2-21-002 COOLING WATER and fasteners.

ESSENTIAL Valve replaced with piping 3 REPLACEMENT VALVE 2/27/2021 2-21-003 COOLING WATER spool.

ESSENTIAL 3 REPLACEMENT VALVE Replace valve. 2/27/2021 2-21-005 COOLING WATER ESSENTIAL 3 REPLACEMENT PIPE Replaced piping spool. 2/27/2021 2-21-006 COOLING WATER ESSENTIAL 3 REPLACEMENT PIPE Replaced piping spool. 2/27/2021 2-21-007 COOLING WATER ESSENTIAL Replaced Valve Seat.

3 REPLACEMENT VALVE 2/11/2021 2-21-010 COOLING WATER Machined Valve Plates.

ESSENTIAL 3 REPLACEMENT VALVE Replaced valve. 01/27/2021. 2-21-011 COOLING WATER Spring Can Support 3 REPAIR SPRING CAN FEEDWATER 4/9/2021 2-21-014 adjustment.

Feed Water 3 REPAIR SNUBBER FEEDWATER 4/9/2021 2-21-015 Support/Snubber removed.

TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE CORRECTIVE ITEM DATE REPAIR/REPLACMENT CLASS SYSTEM DESCRIPTION OF WORK MEASURE DESCRIPTION COMPLETED PLAN COMPONENT Replaced valve with new 2 REPLACEMENT VALVE 3/11/2021 2-21-017 COOLING one.

REACTOR 1 REPLACEMENT SNUBBER Replaced Snubber. 4/7/2021 2-21-022 COOLANT 2 REPLACEMENT SNUBBER MAIN STEAM Replaced Snubber. 4/10/2021 2-21-023 2 REPLACEMENT CONTAINMENT VALVE Replaced valve seat. 4/11/2021 2-21-024 HVAC