ML24095A185

4/4/2024, Summary of Meeting to Discuss MRP-227, Revision 2, PWR Internals Inspection and Evaluations Guideline, RAI No. 4 for the B&W Design Core Barrel Welds

ML24095A185
Person / Time
Site:	Electric Power Research Institute
Issue date:	04/30/2024
From:	Lois James Licensing Processes Branch
To:	Gerond George Licensing Processes Branch
References
MRP-227, Rev 2, EPID L-2022-TOP-0029
Download: ML24095A185 (1)

Text

MEMORANDUM TO:

Gerond A. George, Chief Licensing Projects Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM:

Lois M. James, Senior Project Manager Licensing Projects Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation

SUMMARY

OF MEETING TO DISCUSS MRP-227, REVISION 2, PRESSURIZED WATER REACTOR INTERNALS INSPECTION AND EVALUATIONS GUIDELINE, RAI NO.4 FOR THE B&W DESIGN CORE BARREL WELDS (EPID L-2022-TOP-0029)

On April 4, 2024, the U.S. Nuclear Commission (NRC) staff met with Electric Power Research Institute (EPRI) to discuss EPRI's response to MRP-227, Revision 2, PWR Internals Inspection and Evaluations Guideline, Request for Additional information (RAI) No. 4 for the Babcock &

Wilcox (B&W) design core barrel welds. The meeting summary is Enclosure 1, and the list of attendees is Enclosure 2.

If you have any questions or comments, please contact me via e-mail at Lois.James@nrc.gov.

Docket No. 99902021

Enclosures:

1. Meeting Summary

2. List of Attendees cc: w/enclosure:

See next page CONTACT: Lois M. James, NRR/DORL/LLPB 301-415-3306 April 30, 2024 Signed by James, Lois on 04/30/24

ML24095A185 (Vendor slides are listed in summary)

^via eConcurrence

• via e-mail NRR-106 OFFICE NRR/DORL/LLPB/PM NRR/DORL/LLPB/LA NRR/DNRL/NVIB/BC NRR/DORL/LLPB/BC NAME LJames*

DHarrison ABuford GGeorge DATE 04/05/2024 04/09/2024 4/24/2024 4/24/2024 OFFICE NRR/DORL/LLPB/PM NAME LJames*

DATE 4/30/2024 U.S. Nuclear Regulatory Commission Public Meeting Summary

Title:

Meeting To Discuss Materials Reliability Program (MRP)-227, Revision 2, Pressurized Water Reactor (PWR) Internals Inspection and Evaluations Guideline, Request for Additional Information (RAI) No. 4 for the Babcock & Wilcox (B&W) Design Core Barrel Welds Date of Meeting: April 4, 2024, 10:30 AM - 12:00 PM Location:

Webinar Type of Meeting: This was an Observation Meeting in which attendees had an opportunity to observe the U.S. Nuclear Regulatory Commission (NRC) performing its regulatory function or discussing regulatory issues. Attendees had an opportunity to ask questions of the NRC staff or make comments about the issues discussed following the business portion of the meeting; however, the NRC was not actively soliciting comments towards regulatory decisions at this meeting.

Purpose of the Meeting:

To discuss Electric Power Research Institutes (EPRI's) response to MRP-227, Revision 2, PWR Internals Inspection and Evaluations Guideline, RAI No. 4 for the B&W design core barrel welds General Details:

The NRC staff held a public, observational meeting with EPRI to discuss EPRI's response to MRP-227, Revision 2, RAI No. 4 for the B&W design core barrel welds. The meeting began at 10:30 am and ended at 11:30 am. There were nine NRC staff members, three EPRI staff members, twelve industry members, and no members of the public. The meeting began with introductions of the NRC staff, EPRI staff members and members of industry.

Summary of Meeting:

The NRC staff began its discussion by stating that we received the slides the day prior to the public meeting and the staff did not have sufficient time to process. The NRC staff also stated that no decisions would be made during this meeting.

Industry reviewed the information provided in EPRIs slides (Agencywide Documents Access and Management System (ADAMS) ML24094A326).

The NRC staff expressed concern about the MRP-227, Revision 2, provision that would expand inspections at one site owned by one licensee based on primary inspections done at another site owned by another licensee. Further, the NRC staff explained that Chapter 7 of MRP-227 does not define licensee-to-licensee interactions, just licensee to EPRI.

Industry pointed out that NEI 03-08, Guideline for the Management of Materials Issues, is guidance that the industry has committed to implement and does implement on a routine basis.

NEI 03-08 has provisions for sharing within industry for emerging issues.

The NRC staff stated that, NEI 03-08 notwithstanding, we are reviewing MRP-227, Revision 2.

The EPRI staff members expressed that industry perceives that the NRC staff needs to understand how industry addresses emergent material issues more explicitly than is expressed in MRP-227, Revision 2.

EPRI restated the NRC staffs concern:

utility x performs primary inspection, utility y is obligated to perform expansion inspection This is in MRP-227, Revision 2, and agreed upon by industry There is no regulatory requirement to link the expansion inspection at utility y based on findings at utility x.

EPRI staff further asked if the NRC staffs concern is really about the method of communication.

Specifically, there is a rapid conference call required by NEI 03-08 and then a follow up MRP letter in approximately 6 months.

EPRI staff ended their discussion by stating that the industry understands the NRC staffs concern better and would like to consider how best to address the concern. EPRI staff indicated that the RAI response submitted this week (ADAMS Accession No. ML24095A274) did not include responses to RAIs 3 and 4. The EPRI staff stated that they will request an extension to RAI 3 and 4 responses. The EPRI staff also stated that they may request another public meeting prior to submitting the RAI 3 and 4 responses.

Public Participation Themes:

No member of the public attended the webinar.

Action Items/Next Steps:

The NRC staff will prepare and issue a meeting summary.

Attachments:

Meeting description and agenda - ADAMS Accession No. ML24079A246 Vendor slide presentation - ADAMS Accession No. ML24094A326 U.S. Nuclear Regulatory Commission Public Meeting - Attendees List April 4, 2024

Title:

Meeting to Discuss MRP-227, Revision 2, Pressurized Water Reactor Internals Inspection and Evaluations Guideline, RAI No.4 for the B&W Design Core Barrel Welds Name U.S. Nuclear Regulatory Commission (NRC) Participants Angie Buford NRC James Delosreyes NRC Carolyn Fairbanks NRC Gerond George NRC Lois James NRC James Medoff NRC Demetrius Murray NRC John Tsao NRC On Yee NRC Electric Power Research Institute (EPRI) Participants Name Affiliation Kyle Amberge EPRI Amy Freed EPRI Robert McGill EPRI Industry Participants Name Affiliation Tyler Whaley Ameren Rachel Lee Doss Duke Energy Jasmyn Bone Entergy Sarah Davidsaver Framatome Steve Fyfitch Framatome John Neil Framatome Corey Thomas Southern Nuclear Co.

Timothy Griesbach Structural Integrity Associates, Inc Aaron Bowsher Vistra Josh Morton Vistra Levi Jones Vistra Joshua K. McKinley Westinghouse Electric Company