ML18124A190

Summary of a Telephone Conference Call Held on April 25, 2018, Between the U.S. Nuclear Regulatory Commission and Entergy Regarding the Need for Additional Information to Support the River Bend Station, Unit 1 License Renewal Application Re

ML18124A190
Person / Time
Site:	River Bend
Issue date:	05/25/2018
From:	Sayoc E NRC/NRR/DMLR/MRPB
To:	Maguire W Entergy Operations
Sayoc E, 415-4084
References
CAC MF9757
Download: ML18124A190 (5)

Text

May 25, 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 A TELEPHONE CONFERENCE CALL HELD ON APRIL 25, 2018, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENTERGY REGARDING THE NEED FOR ADDITIONAL INFORMATION TO SUPPORT 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 telephone conference call on April 25, 2018, to discuss the applicants response to a previously issued Request for Additional Information (RAI). The telephone conference call was held at the request of NRC to clarify the applicants response on this RAI.

lists the call participants. Enclosure 2 includes the chronology of the original RAI and the applicants response, and Enclosure 3 includes a summary of the conference call.

Mr. Dave Lach of your staff agreed to provide supplemental information to the April 4, 2018 response within 30 days from the date of the telephone 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 Albert Wong for/

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. Chronology of the RAI Discussed

3. Summary of the Conference Call

ML18124A190 OFFICE PM:MRPB:DMLR LA:MRPB:DMLR BC: MRPB:DMLR PM:MRPB:DMLR NAME ESayoc YEdmonds EOesterle(DDrucker)for ESayoc(AWong)for DATE 05/24/2018 05/24/2018 05/25/2018 05/25/2018

LIST OF PARTICIPANTS FOR THE APRIL 25, 2018 TELEPHONE CONFERENCE CALL PARTICIPANTS AFFILIATIONS Bill Holston U.S. Nuclear Regulatory Commission (NRC)

Brian Allik NRC Emmanuel Sayoc NRC Albert Wong NRC Garry Young Entergy Nuclear Operations Inc. (Entergy)

Alan Cox Entergy Dave Lach Entergy Herbert Rideout Entergy Ted Ivy Entergy Steve McKissack Entergy Mark Spinelli Entergy Jim Morgan Entergy Randy Gauthreaux Entergy Reggie Jackson Entergy Lisa Borel Entergy Mark Sandusky Entergy Mike Cooper Entergy

CHRONOLOGY OF THE RAIs DISCUSSED DURING THE APRIL 25, 2018 TELEPHONE CONFERENCE CALL ORIGINAL RAI#

TRP# RAI Set No.

Date of the Original RAI Issued Date of Applicants

Response

B.1.4-1 Buried Pipe 035 5

December 13, 2017 (ML17347B432)

January 24, 2018 (ML18025B750)

Summary of Public Telephone Call on RAI B.1.4-1 Held on March 6, 2018 035 5

March 28, 2018 (ML18078A755)

April 4, 2018 (ML18094A137)

SUMMARY

OF THE APRIL 25, 2018 TELEPHONE CONFERENCE CALL The following issue was discussed with the applicant during the call. The applicant stated they understood the staffs concerns and would supplement their previous response, dated April 4, 2018, within 30 days from the date of the telephone conference call.

Issue RAI B.1.4-1b Buried Pipe Background. The response to RAI B.1.4-1, dated April 4, 2018, provided updated design information regarding the type of coatings applied to buried stainless steel piping. The RAI response states that in addition to coal tar epoxy, buried stainless steel piping is specified to be coated with silicone-based heat-resistant coatings, specifically Thurmalox 70 or Carboline 4674.

The staff reviewed the technical product data sheets for Thurmalox 70 and Carboline 4674 and noted that these coatings are not recommended for immersion service. The Encyclopedia of Chemical Processing and Design: Volume-50, John J. McKetta Jr, 1994, page 250, states

[a]lthough typical silicone-based heat-resistant coatings work well, they do have some limitations. They are not intended for immersion service and [e]ven when properly cured, these coatings are softer than most organic finishes.

Issue. Although appropriate for high temperature applications, silicone-based heat-resistant coatings are not consistent with the preventive actions program element of GALL Report AMP XI.M41, as modified by LR-ISG-2015-01, Changes to Buried and Underground Piping and Tanks Recommendations. GALL Report AMP XI.M41, Buried and Underground Piping and Tanks Inspection, as modified by LR-ISG-2015-01, states that a broader range of coatings may be used if justification is provided in the LRA; however, it is unclear to the staff how silicone-based heat-resistant coatings can be capable of restricting moisture penetration and electrically isolating the base metal given that they are not recommended for aqueous environments (e.g., groundwater) and may be more susceptible to damage and wear due to ground movement of deleterious material in backfill.

Request. State the basis for why silicone-based heat-resistant coatings, specifically Thurmalox 70 or Carboline 4674, meet the intent of the preventive actions program element of GALL Report AMP XI.M41, as modified by LR-ISG-2015-01 in regard to the unsuitability for immersion service and potential issues with durability of the coating.

Absent an adequate basis associated with the above two limitations, state how many inspections will be conducted per 10-year period and the basis for why the number of inspections will be adequate to manage associated aging effects.