ML18057A453

Summary of Telephone Conference Call Held on February 20, 2018 Between the U.S. Nuclear Regulatory Commission and Energy Regarding RAI Pertaining to the River Bend Station, Unit 1 License Renewal Application Review

ML18057A453
Person / Time
Site:	River Bend
Issue date:	03/07/2018
From:	Sayoc E C NRC/NRR/DMLR/MRPB
To:	Maguire W F Entergy Operations
Wong A, NRR-DMLR 415-3081
References
CAC MF9757
Download: ML18057A453 (4)

Text

March 7, 2018 . Mr. William F. Maguire Site Vice President River Bend Station, Unit 1 Entergy Operations, Inc.

5485 U.S. Highway 61 N St. Francisville, LA 70775

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON FEBRUARY 20, 2018, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENTERGY REGARDING REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE RIVER BEND STATION, UNIT 1 LICENSE RENEWAL APPLICATION REVIEW (CAC NO. MF9757)

Dear Mr. Maguire:

The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Entergy Operations, Inc. (the applicant) held a public telephone conference call on February 20, 2018, to discuss and clarify the applicant's response to the staff's requests for additional information, RAI B.1.41-1 Structures Monitoring RAI Set 5, (Agencywide Documents Access and Management System (ADAMS) Accession No. ML18025B750). The telephone conference was held at the request of NRC to clarify the applicant's response to the staff's RAI.

Enclosure 1 includes a listing of the participants and Enclosure 2 provides a summary of the key points discussed in the conference call. The applicant had an opportunity to comment on this summary.

If you have any questions, please contact me by telephone at 301-415-4084 or via e-mail at Emmanuel.Sayoc@nrc.gov. Sincerely,

/RA/ Emmanuel Sayoc, Project Manager License Renewal Project Branch Division of Materials and License Renewal Office of Nuclear Reactor Regulation Docket No. 50-458

Enclosures:

1. List of Participants

2. Summary of the Telephone Call

ML18057A453 OFFICE PM:MRPB:DMLR BC:MRPB:DMLR BC:MRPB:DMLR PM:MRPB:DMLR NAME ESayoc YEdmonds EOeslerle ESayoc DATE 03/6/2018 03/1/2018 03/7/2018 03/7/2018 Enclosure 1 LIST OF PARTICIPANTS FOR THE FEBRUARY 20, 2018 TELEPHONE CONFERENCE CALL PARTICIPANTS A FFILIATIONSBrian Wittick U.S. Nuclear Re g ulator y Commission (NRC)Eric Oesterle NRC Juan Lo pez NRC A n gie Buford NRC Andrew Prinaris NRC Emmanuel Sa yoc NRC A lbert Won g NRC Alan Cox Enter gy Nuclear O p erations Inc.

(Enter gy)Dave Lach Entergy Mark S p inelli Enter gyHerbert Rideout Enter gy Garr y Youn g Enter gySteve McKissack Enter gyJim Mor gan Enter gy Rand y Gauthreaux Enter gyMike Coo p e r Enter gy A l yson Coates Enter gyTim Schenk Enter gy Mark Sandusk y Enter gyLisa Borel Enter gy Enclosure 2

SUMMARY

OF THE TELEPHONE CALL BACKGROUND In response to RAI B.1.41-1 (included in Set 5 RAIs Response, ADAMS ML18025B750), the applicant stated, in part, that The RBS Inservice Inspection-IWF (ISI-IWF) Program and Structures Monitoring Program will be consistent with the programs described in NUREG-1801, Sections XI.S3 and Section XI.S6. The recommendation in the "preventive actions" program elements of NUREG-1801 Section XI.S3 and Section XI.S6 to consider the potential for stress corrosion cracking (SCC) when selecting high-strength bolts is included in the RBS ISI-IWF Program and SMP. A program implementing procedure states: When procuring high strength (yield strength >

150 ksi) fasteners (bolts or studs), greater than 1" nominal diameter, confirmation of actual yield strength is required. If actual strength is greater than 150 ksi, and the proposed installation will be in a corrosive environment (i.e., moisture, dissolved oxygen, sulfates, fluorides, or chlorides), specify inspection/replacement requirements for the fasteners to address the potential for stress corrosion cracking (SCC). During the telephone call, the staff inquired about the procurement of high strength bolts and the applicant's inspection requirements under both the Inservice Inspection - IWF and Structures Monitoring Programs (LRA Sections B.1.23 and B.1.41, respectively). The applicant stated that their intent is not to procure such fasteners, although its procedural guidance permits the purchase of these fasteners. The staff noted that with the program allowing for the procurement of high-strength bolting material, it is not clear what measures are planned for the aging management of the fasteners. The staff also noted that the applicant's Aging Management Program (AMP) does not include enhancements under the "parameters monitored" and "detection of aging effects" program elements to address volumetric examinations that the GALL Report recommended to supplement visual examinations for these fasteners, and that the AMP does not take exception to the GALL Report recommendation in the "preventive actions" program element that high-strength bolting material not be used. The applicant stated that it will reevaluate plans to manage the effects of aging on high-strength bolting material and will supplement its response to RAI B.1.41-1 and the LRA per the discussion. The applicant also stated that should the procurement of such fasteners become necessary for operational reasons, the applicant will state explicitly in its implementing procedure(s) how it will enhance its Structures Monitoring Program to be consistent with the GALL Report recommendations (e.g., supplementing visual inspections with volumetric examinations to detect cracking). The staff also noted that the GALL Report contains provisions that allow for a waiver from volumetric examination if it can be verified during the LRA review that high-strength bolts are not located in a corrosive environment or that the AMP includes provisions to ensure a non-corrosive environment is maintained. The applicant stated that it will factor this waiver into consideration when reviewing its options.

Response Date Entergy and the staff agreed that the supplemented RAI response will be provided no later than 30 days from the date of the of the public telephone conference call.