RA-24-0073, Transmittal of Oconee Unit 2, Refuel 31 (O2R31) Inservice Inspection (ISI) Report, Fifth 10-Year ISI Interval
| ML24081A315 | |
| Person / Time | |
|---|---|
| Site: |  |
| Issue date: | 03/21/2024 |
| From: | Ellis K Duke Energy Carolinas |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| RA-24-0073 | |
| Download: ML24081A315 (1) | |
Text
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10 CFR 50 .55a RA-24-0073 March 21, 2024
U . S . Nuclear Regulatory Commission Attn: Document Control Desk Washington , DC 20555-0001
Duke Energy Carolinas, LLC Oconee Nuclear Station , Unit 2 Docket No. 50-270 Renewed License No . DPR-47
Subject:
Transmittal of Oconee Unit 2, Refuel 31 (O2R31) lnservice Inspection {ISi) Report, Fifth 10-Year ISi Interval
Pursuant to the 2007 Edition through the 2008 Addenda of the American Soc iety of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code , Section XI , IWA-6000 , Duke Energy Carolinas , LLC is providing its lnservice Inspection (ISi) summary pertaining to the 31 st refueling outage (O2R31) for Oconee Nuclear Station (ONS) Unit 2.
The enclosure contains the O2R31 ISi summary report.
This submittal contains no regulatory commitments . Please refer any questions regarding the submittal to Ryan Treadway, Director- Nuclear Fleet Licensing, at 980-373-5873 .
Kevin M. Ellis Genera l Manager - Nuclear Regulatory Affairs, Policy & Emergency Preparedness
JLV
Enclosure:
lnservice Inspection Summary Report Unit 2 Oconee Fall 2023 Refueling Outage O2R31 (Outage 5)
U.S. Nuclear Regulatory Commission RA-24-0073 Page 2
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-24-0073
Enclosure
Inservice Inspection Summary Report Unit 2 Oconee Fall 2023 Refueling Outage O2R31 (Outage 5)
[6 pages follow this cover page]
DUKE ENERGY
INSERVICE INSPECTION
SUMMARY
REPORT UNIT 2 OCONEE FALL 2023 REFUELING OUTAGE O2R31 (Outage 5)
Location: Highway 130/183 Seneca, South Carolina 29672
NRC Docket No. 50-270
Commercial Service Date: September 9, 1974
Owner: Duke Energy
Revision 0
Digitally signed by ACKell1 (365600)
Date: 2024.02.29 09:13:23 -05'00' Originated By: Date
Austin C. Keller Digitally signed by KASull1 (524967)
Checked By: Date: 2024.02.29 09:31:22 -05'00'Date Kaitlyn Sullivan MAP9681 Digitally signed by MAP9681 (102140)
Approved By: (102140) Date: 2024.03.05 09:39:03 -05'00'Date
Mark A. Pyne CASE N-532-5
FORM OAR-1 OWNER'S ACTIVITY REPORT
Report Number Owners Activity Report for Refueling Outage O2R31
Plant Oconee Nuclear Station, 7800 Rochester Highway, Seneca, SC 29672
Unit No. 2 Commercial service date 09/09/1974 Refueling outage no.O2R31 (if applicable)
Current inspection intervalFifth Inspection Interval (ISI), Thir d Inspection Interval (Containment ISI)
(1st, 2nd, 3rd, 4th, other)
Current inspection periodThird Inspection Period (ISI and Containment ISI)
(1st, 2nd, 3rd)
Edition and Addenda of Section XI applicable to the2007 Edition through 2008 Addenda inspection plans 2017 & 2019 Editions (See Attachment A)
Date and revision of inspection plansSee 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-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-705-1, N-706-1, N-711-1, N-712, N-716-1, N-722-1, N-729-6, N-731, N-735, N-751, Code Cases used for inspection N-765, N-770-5, N-771, N-775, N-776, N-786-3, N-798, N-800, N-805, and evaluation: N-823, N-823-1, N-825, N-831, N-831-1, N-843, N-845-1, N-853, & N-854 (if applicable)
CERTIFICATE OF CONFORMANCE I certify that (a) the statements made in this report arecorrect; (b) the examinations and tests meet the Inspection Plan as required by the ASME Code, SectionXI; and (c) the repair/replacementactivitiesand evaluations supportingthe completionof O2R31 conform to the requirements of Section XI.
(refueling outage number)
Digitally signed by ACKell1 (365600)
Signed Date: 2024.02.29 09:14:03 -05'00'Austin C. Keller, ISI Program Owner Date 02/29/2024
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 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 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 Inspectors Signature National Board, State, Province, and Endorsements Mark E. Zurbuch
Date 3/12/2024
Page 1 of 5 CASE N-532-5
Attachment A Oconee Unit 2 Refueling Outage 31, Inservice Inspection Report
The Oconee Nuclear Station Unit 2 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.
x 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 2.
x 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 2.
x 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 2.
x Per RIS 2004-12, Letter RA-23-0001, NRC Accession Number ML23033A037 and approval NRC Accession Number ML23118A076, the NRC staff concluded that the use of paragraph IWA-6230(b) of the 2019 Edition of the ASME B&PV Code,Section XI, is acceptable for Oconee Unit 2.
This summary report is being submitted pursuant to the reporting requirements of ASME Section XI, IWA-6000 as amended by ASME Code Case N-532-5, Repair/Replacement Activity Documentation Requirements and Inservice Inspection Summary Report Preparation and Submission Section XI, Division 1.
Contained within this summary report are the form OAR-1 (Owners Activity Report) and Tables 1 and 2 of Code Case N-532-5 for Oconee Nuclear Station during cycle 31 and Refueling Outage 31 (O2R31).
O2R31 is the last outage of the third ISI period in the fifth inspection interval. O2R31 is the last outage of the third Containment period in the third inspection interval. This report includes all Repair/Replacement activities from December 8, 2021 through November 22, 2023 cycle 31.
Date and Revision of Inservice Inspection Plans:
I. Fifth Interval Inservice Inspection Plans
- 1. The following documents comprise the Oconee Nuclear Station 5th Interval Inservice Inspection Plan for ONS Unit 2 (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.
3, dated 04/3/2023.
- b. ISI Schedule - Fifth Ten-Year Interval Inservice Inspection Schedule Oconee Nuclear Station Unit 2, Document #OISI-0169.10-0050-Unit 2, Rev. 2, dated 08/16/2022.
- 2. The following document comprises the Oconee Nuclear Station 5th Interval Inservice Inspection Pressure Test Plan for ONS Unit 2:
- 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. 9, dated 04/12/2023.
Page 2 of 5 CASE N-532-5
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 2:
- a. Oconee Nuclear Station - Augmented Inservice Inspection NDE Plan - General Requirements and Units Detail Listing, Document #OISI-0169.10-0050 - AUG-ISI, Rev. 9, dated 03/22/2023.
III. Third Interval Containment Inservice Inspection Plan
- 1. The following document comprises the Oconee Nuclear Station 3rd Interval Containment Inservice Inspection Plan for Unit 2 (Class MC):
- a. Third Interval Containment Inservice Inspection Plan Oconee Nuclear Station Units 1, 2,
& 3, Document #O-ISIC3-62-0001, Rev. 10, dated 02/16/2023.
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 Boric acid residue was found during ISI Areas identified in NCR #02495242 C-H / C7.10 Pressure Test Zone, O2LPI-2A were evaluated by Engineering and found to be acceptable.
Page 4 of 5 CASE N-532-5
TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE
Code Date Repair /
Class Item Description Description of Work Completed Replacement Plan Number 1 2RC-HX-000A Plug A SG tubes as required 11/11/2023 20584397-17 I I 1 2RC-HX-000B Plug B SG tubes as required 11/9/2023 20584398-17
Page 5 of 5