RA-22-0255, Refuel 31 (O3R31) Inservice Inspection (ISI) Report, Fifth 10-Year ISI Interval

Refuel 31 (O3R31) Inservice Inspection (ISI) Report, Fifth 10-Year ISI Interval

ML22241A116
Person / Time
Site:	Oconee
Issue date:	08/29/2022
From:	Gibby S Duke Energy Carolinas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RA-22-0255
Download: ML22241A116 (9)

Text

Shawn K. Gibby Vice President Nuclear Engineering 526 South Church Street, EC-07H Charlotte, NC 28202 704-519-5138 Shawn.Gibby@duke-energy.com RA-22-0255 10 CFR 50.55a August 29, 2022 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Oconee Nuclear Station, Unit 3 Docket No. 50-287 Renewed License No. DPR-55

Subject:

Oconee Unit 3, Refuel 31 (O3R31) Inservice Inspection (ISI) Report, Fifth 10-Year ISI Interval Pursuant to the 2007 Edition through the 2008 Addenda of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI, IWA-6000, Duke Energy Carolinas, LLC is providing its Inservice Inspection (ISI) summary pertaining to the 31st refueling outage (O3R31) for Oconee Nuclear Station (ONS) Unit 3.

The Enclosure to this letter contains the O3R31 ISI summary report.

This submittal contains no regulatory commitments. Please refer any questions regarding this submittal to Ryan Treadway, Director - Nuclear Fleet Licensing, at 980-373-5873.

Sincerely, Shawn K. Gibby Vice President - Nuclear Engineering JLV

Enclosure:

Inservice Inspection Summary Report Unit 3 Oconee Spring 2022 Refueling Outage O3R31 (Outage 4)

U.S. Nuclear Regulatory Commission Page 2 RA-22-0255 cc: (with Enclosure)

Ms. Laura Dudes Administrator, Region II U.S. Nuclear Regulatory Commission Marquis One Tower 245 Peachtree Center Avenue NE, Suite 1200 Atlanta, GA 30303-1257 Mr. Shawn Williams NRC Senior Project Manager Oconee Nuclear Station Mr. Jared Nadel NRC Senior Resident Inspector Oconee Nuclear Station

Enclosure to RA-22-0255 Enclosure Inservice Inspection Summary Report Unit 3 Oconee Spring 2022 Refueling Outage O3R31 (Outage 4)

DUKE ENERGY INSERVICE INSPECTION

SUMMARY

REPORT UNIT 3 OCONEE SPRING 2022 REFUELING OUTAGE O3R31 (Outage 4)

Location: Highway 130/183, Seneca, SC 29672 NRC Docket No. 50-287 Commercial Service Date: December 16, 1974 Owner: Duke Energy 526 South Church St.

Charlotte, NC 28201-1006 Revision 0 Originated By: Date Austin C. Keller Checked By: Date Angela Staller Approved By: Date Mark A. Pyne

CASE N-532-5 FORM OAR-1 OWNER'S ACTIVITY REPORT Report Number O3R31 Plant Oconee Nuclear Station, Highway 130/183, Seneca, SC 29672 Unit No. 3 Commercial service date 12/16/1974 Refueling outage no. O3R31 (if applicable)

Current inspection interval Fifth Inspection Interval (ISI), Third Inspection Interval (Containment ISI)

(1st, 2nd, 3rd, 4th, other)

Second & Third Inspection Period (ISI) & Third Inspection Period (Containment)

Current inspection period See Attachment A for details (1st, 2nd, 3rd)

Edition and Addenda of Section XI applicable to the inspection plans ASME Section XI 2007 Edition through 2008 Addenda Date and revision of inspection plans See Attachment A Edition and Addenda of Section XI applicable to repair/replacement activities, if different than the inspection plans Same as above The following Code Cases are permitted by the Augmented ISI, ISI, and Pressure Test Plans, 5th Interval: N-513-3,N-513-4, N-532-4, N-532-5, N-586-1, N-600, N-613-1, N-613-2, N-639, N-643-2, N-648-1, N-648-2, N-651, N-663, N-705, N-706-1, N-711-1, N-712, N-716-1, N-722-1, N-729-6, N-731, N-735, N-765, N-770-5, N-771, N-775, N-776, N-786-1, N-798, Code Cases used for inspection N-800, N-805, N-823, N-823-1, N-825, N-831, N-843, N-845, N-853, &

and evaluation: N-854 (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 O3R31 conform to the requirements of Section XI.

(refueling outage number)

Signed Austin C. Keller, ISI Program Owner Date 08/16/2022 CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of South Carolina and employed by Bureau Veritas Inspection and Insurance Company of Lynn, MA have knowledge and belief, the Owner has performed all activities represented by this report in accordance with the requirements of Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the repair/replacement activities and evaluation 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 a loss of any kind arising from or connected with this inspection.

Commissions 13048, 201, AI, IS, N, I, C, R National Board, State, Province, and Endorsements Mark E. Zurbuch Page 1 of 5

CASE N-532-5 Date Attachment A Oconee Unit 3 Refueling Outage 31, Inservice Inspection Report The Oconee Nuclear Station Unit 3 Fifth Ten Year Inservice Inspection (ISI) Plan complies with 10CFR50.55a(g), which implements, by reference, the American Society of Mechanical Engineers (ASME)

Boiler and Pressure Vessel Code,Section XI, 2007 Edition with 2008 Addenda.

Per RIS 2004-12, Letter RA-20-0262, NRC Accession Number ML20260H325 and approval NRC Accession Number ML20300A206, the NRC staff concluded that the use of subparagraph IWA-4540(b) of the 2017 Edition of the ASME B&PV Code,Section XI, is acceptable for Oconee Unit 3.

Per RIS 2004-16, Letter RA-20-0263, NRC Accession Number ML20260H326 and approval NRC Accession Number ML21113A013, the NRC staff concluded that the use of subparagraph IWA-4340 of the 2017 Edition of the ASME B&PV Code,Section XI, is acceptable for Oconee Unit 3.

Per RIS 2004-12, Letter RA-20-0191, NRC Accession Number ML20265A028 and approval NRC Accession Number ML21029A335, the NRC staff concluded that the use of paragraphs IWA-5120, IWA-5213, IWA-5241, IWA-5242, and IWA-5250 of the 2017 Edition of the ASME B&PV Code,Section XI, is acceptable for Oconee Unit 3.

This summary report is being submitted pursuant to the reporting requirements of ASME Section XI, IWA-6000 as amended by ASME Code Case N-532-Requirements and Inservice Inspection Summary Report Preparation and Submission Section XI, Division Contained within this summary report are the form OAR-Code Case N-532-5 for Oconee Nuclear Station during cycle 31 and Refueling Outage 31 (O3R31).

O3R31 is the first outage of the third ISI period in the fifth inspection interval. For ISI examinations Period 2 was extended by 12 months (as permitted by IWA-2430(c)(3)) to 07/15/2022. This allowed for selected placeholder outage (O3R31a) was added to Period 2 to track the scheduling and completion of examinations performed during O3R31 that are to be credited for Period 2. Only those examinations scheduled for O3R31a shall be credited for Period 2 compliance. In no case was any one exam credited for both periods.

For Containment ISI examinations O3R31 is the first outage of the third Containment period in the third inspection interval.

This report includes all Repair/Replacement activities from May 10, 2020 through May 30, 2022, Cycle 31.

Date and Revision of Inservice Inspection Plans:

I. Fifth Interval Inservice Inspection Plans

1. The following documents comprise the Oconee Nuclear Station 5 th Interval Inservice Inspection Plan for ONS Unit 3 (Class 1, 2, and 3 Components):

a. ISI Plan - Fifth Interval Inservice Inspection Plan, Oconee Nuclear Station Units 1, 2, & 3 and Keowee Hydro Station Units 1 & 2, Document #OISI-0169.10-0050-ISI PLAN, Rev.

1, dated 2/22/2021.

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CASE N-532-5

b. ISI Schedule Fifth Ten-Year Interval Inservice Inspection Schedule Oconee Nuclear Station Unit 3, Document #OISI-0169.10-0050-Unit 3, Rev. 1, dated 2/26/2021.

2. The following document comprises the Oconee Nuclear Station 5th Interval Inservice Inspection Pressure Test Plan for ONS Unit 3:

a. Oconee Nuclear Station - Fifth Inspection Interval Inservice Inspection PT (Pressure Test) Plan General Requirements Units 1, 2, and 3, Document #OISI-0169.20-0050-PTPLAN, Rev. 8, dated 7/21/2022.

II. Fifth Interval Augmented Inservice Inspection Plan

1. The following document comprises the Oconee Nuclear Station 5th Interval Augmented Inservice Inspection Plan and Schedule for Unit 3:

a. Oconee Nuclear Station - Augmented Inservice Inspection NDE Plan - General Requirements and Units Detail Listing, Document #OISI-0169.10-0050 - AUG-ISI, Rev. 7, dated 1/19/2021.

III. Third Interval Containment Inservice Inspection Plan

1. The following document comprises the Oconee Nuclear Station 3rd Interval Containment Inservice Inspection Plan for Unit 3 (Class MC):

a. Third Interval Containment Inservice Inspection Plan Oconee Nuclear Station Units 1, 2,

& 3, Document #O-ISIC3-62-0001, Rev. 9, dated 05/1/2022.

Page 3 of 5

CASE N-532-5 TABLE 1 ITEMS WITH FLAWS OR RELEVANT CONDITIONS THAT REQUIRED EVALUATION FOR CONTINUED SERVICE Examination Category and Item Description Evaluation Description Item Number Areas identified in NCR #02428399 Boric acid residue was found during ISI C-H / C7.10 were evaluated by Engineering and Pressure Test Zone, O3HPI-2A found to be acceptable.

Areas identified in NCR #02428404 Boric acid residue was found during ISI C-H / C7.10 were evaluated by Engineering and Pressure Test Zone, O3HPI-2B found to be acceptable.

Areas identified in NCR #02428080 Relevant conditions were identified during ISI C-H / C7.10 were inspected and resolved per WO Pressure Test Zone, O3RCMU-1 20537520.

Areas identified in NCR #02366873 Boric acid residue was found during ISI C-H / C7.10 were evaluated by Engineering and Pressure Test Zone, I3HPI-4 found to be acceptable.

Areas identified in NCR #02367446 Boric acid residue was found during ISI C-H / C7.10 were evaluated by Engineering and Pressure Test Zone, I3HPI-7 found to be acceptable.

Areas identified in NCR #02374063 Boric acid residue was found during ISI C-H / C7.10 were evaluated by Engineering and Pressure Test Zone, I3RBS-1 found to be acceptable.

Areas identified in NCR #02374413 Boric acid residue was found during ISI C-H / C7.10 were evaluated by Engineering and Pressure Test Zone, I3HPI-1 found to be acceptable.

Areas identified in NCR #02379143 Boric acid residue was found during ISI C-H / C7.10 were evaluated by Engineering and Pressure Test Zone, I3LPI-1 found to be acceptable.

Areas identified in NCR #02375976 Boric acid residue was found during ISI D-B / D2.10 were evaluated by Engineering and Pressure Test Zone, I3SF-2 found to be acceptable.

Indications identified in NCR #02426502 ISI Summary No. O3-08773. VT-1 were evaluated by Engineering and examination of 3-SCV-011 revealed pitting of found to be acceptable for continued E-C / E4.11 the liner plate exceeding 10% nominal wall service per IWE-3122.3. The liner plate loss. in this area was re-coated during O3R31 per WO 20208696.

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CASE N-532-5 TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE Repair /

Code Item Description Description of Work Date Completed Replacement Class Plan Number Encapsulate wall thinning 3 U3 CCW Inlet piping per IWA-4340 2017 Edition 5/17/2022 20395451-01 Reference RA-20-0263 Perform weld repair of 3 0FO-FL-004B cracked filter bracket 6/18/2020 20405673-02 support Replace cuno filter housing 3 0LPS-FL-0027 10/1/2020 20426301-01 due to crack Remove defect and 3 U3 CCW Inlet piping encapsulate through wall 5/20/2022 20476280-45 hole 1 3RC-HX-000A Plug SG tubes 5/16/2022 20476408-17 1 3RC-HX-000B Plug SG tubes 5/16/2022 20476409-17 Replace piping/fittings due 3 3RC-HX-0018 piping 5/24/2022 20535005-01 to through wall leak Page 5 of 5