ML24025A159
| ML24025A159 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 01/25/2024 |
| From: | Michael Mahoney NRC/NRR/DORL/LPL2-2 |
| To: | Earp D Duke Energy Progress |
| References | |
| L-2023-LLL-0016 | |
| Download: ML24025A159 (4) | |
Text
From:
Michael Mahoney Sent:
Thursday, January 25, 2024 12:16 PM To:
Dennis Earp (dennis.Earp@duke-energy.com)
Subject:
Shearon Harris Nuclear Power Plant, Unit 1 - Request for Additional Information - RVI AMP and Inspection Plan (L-2023-LLL-0016)
Attachments:
RAIs - Harris AMP and Inspection Plan for RV Internals.docx Hi Dennis, By letter dated September 21, 2023 (Agencywide Documents Access Management System (ADAMS) Accession No. ML23264A034), Duke Energy Progress, LLC (Duke Energy or the licensee), submitted for NRC review its Aging Management Program (AMP) and Inspection Plan for the reactor vessel (RV) internals for the Shearon Harris Nuclear Power Plant, Unit 1 (Harris).
The U.S. Nuclear Regulatory Commission (NRC) staff is reviewing your submittal and has identified areas where additional information is needed to complete its review.
As discussed, response to the attached RAIs is requested no later than 30 business days from todays date.
The NRC staff considers that timely responses to RAIs help ensure sufficient time is available for staff review and contribute toward the NRCs goal of efficient and effective use of staff resources. If circumstances result in the need to revise the requested response date, please contact me.
Once this email is added to ADAMS, I will provide the accession number.
Thanks Mike Mahoney Project Manager, LPL2-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Desk: (301)-415-3867 Mobile: (301)-250-0450 Email: Michael.Mahoney@nrc.gov
Hearing Identifier:
NRR_DRMA Email Number:
2379 Mail Envelope Properties (SA1PR09MB948666543BA431C5267CEB51E57A2)
Subject:
Shearon Harris Nuclear Power Plant, Unit 1 - Request for Additional Information -
RVI AMP and Inspection Plan (L-2023-LLL-0016)
Sent Date:
1/25/2024 12:16:05 PM Received Date:
1/25/2024 12:16:09 PM From:
Michael Mahoney Created By:
Michael.Mahoney@nrc.gov Recipients:
"Dennis Earp (dennis.Earp@duke-energy.com)" <dennis.Earp@duke-energy.com>
Tracking Status: None Post Office:
SA1PR09MB9486.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 1286 1/25/2024 12:16:09 PM RAIs - Harris AMP and Inspection Plan for RV Internals.docx 27722 Options Priority:
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REQUEST FOR ADDITIONAL INFORMATION AGING MANAGEMENT PROGRAM AND INSPECTION PLAN FOR RV INTERNALS REVIEW RENEWED FACILITY OPERATING LICENSE NO. NPF-63 DUKE ENERGY PROGRESS, LLC SHEARON HARRIS NUCLEAR POWER PLANT, UNIT 1 DOCKET NO. 50-400 EPID: L-2023-LLL-0016
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Background===
By letter dated September 21, 2023 (Agencywide Documents Access Management System (ADAMS) Accession No. ML23264A034), Duke Energy Progress, LLC (Duke Energy or the licensee), submitted for NRC review its Aging Management Program (AMP) and Inspection Plan for the reactor vessel (RV) internals for the Shearon Harris Nuclear Power Plant, Unit 1 (Harris).
The AMP and Inspection Plan for Harris is based upon the Electric Power Research Institute (EPRI) Technical Report MRP-227, Rev. 1-A, Material Reliability Program: Pressurized Water Reactor Internals Inspection and Evaluations Guideline (ML19339G350), which provides guidance for managing age-related material degradation in RVI components through the period of extended operation.
Regulatory Basis In accordance with Harris Updated Final Safety Analysis Report (UFSAR), Section 18.1, Duke Energy, provided to the NRC the Harris RV Internals (RVI) AMP and Inspection Plan.
UFSAR, Section 18.1 states that, In accordance with the guidance of NUREG-1801 [Generic Aging Lessons Learned (GALL) Report], regarding aging management of reactor vessel internals components for aging mechanisms, such as embrittlement and void swelling, HNP will:
(1) participate in the industry programs for investigating and managing aging effects on reactor internals (such as Westinghouse Owner's Group and Electric Power Research Institute materials programs), (2) evaluate and implement the results of the industry programs as applicable to the reactor internals, and (3) upon completion of these programs, but not less than 24 months before entering the period of extended operation, submit an inspection plan for reactor internals to the NRC for review and approval.
NRC Staff Request for Additional Information (RAI)
RAI-1
By letter dated May 19, 2023 (ML23290A020) the EPRI Materials Reliability Program (MRP) issued interim guidance in MRP 2023-005 to the members of the Pressurized Water Reactor (PWR) Materials Management Program (PMMP) Executive Committee Members and MRP Research Integration Committee Members. This interim guidance was based on recent operating experience at a United States PWR and was developed by the Core Barrel Focus Group to update the guidelines within MRP-227 regarding inspection of core barrel welds.
Section 4.2.5 of WCAP-18710-NP, Aging Management Program and Inspection Plan for Shearon Harris Unit 1 Reactor Vessel Internals, Revision 0 (Enclosure 1 to letter dated September 21, 2023), states that during a fall 2022 inspection, a 3-loop Westinghouse-designed plant identified crack-like surface indications on the inside diameter of the core barrel upper girth weld. The licensee stated it will participate in an industry focus group, evaluate the impact of this fall 2022 operating experience, and address any resulting industry guidance changes at Harris.
However, the NRC staff noted that the inspections for the core barrel in the licensees RVI AMP and Inspection Plan appear to be based on MRP-227, Revision 1-A and does not address this newly issued interim guidance; thus, it is not clear to the NRC staff whether the licensees RVI AMP and Inspection Plan addresses this recent operating experience.
Discuss the applicability of the interim guidance in MRP 2023-005 to the Harris AMP and Inspection Plan for RVIs:
If this interim guidance is applicable, provide any necessary revisions to the Harris AMP and Inspection Plan for RVIs.
If this interim guidance is not applicable, justify that this recent operating experience and the interim guidance in MRP 2023-05 is not relevant.