ML12011A009

STP - Record of Conference Call 01102012 on Aluminum-Bronze RAI Responses.Docx

ML12011A009
Person / Time
Site:	South Texas
Issue date:	02/09/2012
From:	Daily J W License Renewal Projects Branch 1
To:
Daily J
References
TAC ME4936, TAC ME4937
Download: ML12011A009 (6)

Text

UNITED NUCLEAR REGULATORY WASHINGTON, D.C. 20555-0001 February 9, 2012 STP Nuclear Operating Company South Texas Project SUMMARY OF TELEPHONE CONFERENCE CALL HELD ON JANUARY 10, 2012, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND STP NUCLEAR OPERATING COMPANY, REGARDING APPLICANT RESPONSES ON ALUMINUM-BRONZE PROGRAMS, FOR THE SOUTH TEXAS PROJECT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC. NOS. ME4936 AND ME4937) The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of STP Nuclear Operating Company (STPNOC or the applicant) held a telephone conference call on January 10, 2012, to discuss and clarify issues related to the applicant's responses to requests for additional information (RAls) on the applicant's aluminum-bronze Aging Management Program (AMP), for the South Texas Project, Units 1 and 2, license renewal application. The telephone conference call was useful in clarifying the applicant's responses and identifying the staff's Issues for the RAls. Enclosure 1 provides a listing of the participants and Enclosure; 2 contains a listing of the issues discussed with the applicant, including a brief description of the status of the items. The applicant had an opportunity to comment on this summary. ! .,-J0 t\AM John Daily, Senior ProJect'Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-498 and 50-499 Enclosures: As stated cc w/ends: ListserJ TELEPHONE CONFERENCE SOUTH TEXAS LICENSE RENEWAL LIST OF JANUARY 10, PARTICIPANTS AFFILIATIONS John Daily r Regulatory Commission (NRC) ! Bill Holston NRC John Wise NRC Jinhui Diao NRC I Ken T aplett Mark Wales STP Nuclear Operating Company (STPNOC) STPNOC NOC I ! Kevin Regis Albert Mcintyre STPNOC STPNOC

• Richard Kersey STPNOC Michael Garner Suryant (Sam) Patel Gary Warner STPNOC STPNOC STARS Center of Business -Worley Parsons ENCLOSURE I CONFERENCE CALL WITH REGARDING APPLICANT RESPONSES ON ALUMINUM-BRONZE STP LICENSE RENEWAL JANUARY 10, The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of STP Nuclear Operating Company (STPNOC or the applicant) held a telephone conference call on January 10, 2012, to discuss and clarify the applicant's responses to RAls B2.1.37 -1 and B2.1.37-2, related to the license renewal application (LRA). The participants indicated that the calls were useful in clarifying the questions discussed. Issues and discussions: The staff explained its general approach to evaluating the aging management of aluminum bronze components susceptible to selective leaching in terms of what will be needed: Given the large number of aluminum-bronze defects that have gone through-wall and the unknown condition of the underground pipe welds, the staff needs to be able to conclude that the analytical basis of this plant-specific phenomenon is adequate to demonstrate structural integrity throughout the period of extended operation. The applicant's analyses and discussions (in the RAI responses and others if necessary) should demonstrate an adequate basis for why emergent through-wall defects and undiscovered dealloying would be acceptable. The program should conduct sufficient inspections to determine the worst-case degradation occurring in the ten-year period prior to the period of extended operation. The program should conduct sufficient inspections to confirm that continued degradation during the period of extended operation is fully bounded by the applicant's assumptions. Discussion revolved around the following topics relative to the responses to RAls B2.1.37 -1 and B2.1.37 -2, in order for the staff to better understand the applicant's responses. Material properties used in APTECH Calculation 8303381, letter calculation AES-C-1964-1, and calculation HL&P Lab Report MT-3512 and its statement about time-dependent crack propagation STP Relief requests 44,42, 37, and 25 RAI B2.1.37-1 Response Tables 1 and 2 Acceptance criteria in STP calculations versus American Society of Engineers (ASNlE) Code Section XI design How the output from the above calculations are used when a selective leaching site is discovered in the plant ENCLOSURE 2

-2 Number and timing of destructive examinations in relation to confirming degree of selective leaching LICENSEE: STP Nuclear Operating Company FACILITY: South Texas Project SUBJECT: SUMMARY OF TELEPHONE CONFERENCE CALL HELD ON JANUARY 10, 2012, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND STP NUCLEAR OPERATING COMPANY, REGARDING APPLICANT RESPONSES ON ALUMINUM-BRONZE PROGRAMS, FOR THE SOUTH TEXAS PROJECT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC. NOS. ME4936 AND ME4937) The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of STP Nuclear Operating Company (STPNOC or the applicant) held a telephone conference call on January 10, 2012, to discuss and clarify issues related to the applicant's responses to requests for additional information (RAls) on the applicant's aluminum-bronze Aging Management Program (AMP), for the South Texas Project, Units 1 and 2, license renewal application. The telephone conference call was useful in clarifying the applicant's responses and identifying the staff's issues for the RAls. Enclosure 1 provides a listing of the participants and Enclosure 2 contains a listing of the issues discussed with the applicant, including a brief description of the status of the items. The applicant had an opportunity to comment on this summary. IRAJ John Daily, Senior Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-498 and 50-499 Enclosures: As stated cc w/encls: Listserv DISTRIBUTION: See next page ADAMS Accession No . .. IV! L 120 11 a009 I OFFICE LARPB1 :DLR PM:RPB1 :DLR BC:RPB1 :DLR PM:RPB1 :DLR NAME YEdmonds JDaily DMorey .JDaily DATE 02/09112 02/09/12 02/09/12 02/09/12 OFFICIAL RECORD Memorandum to File from J. Daily dated February 9,2012 SUMMARY OF TELEPHONE CONFERENCE CALL HELD ON JANUARY 10, 2012, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND STP NUCLEAR OPERATING COMPANY, REGARDING APPLICANT RESPONSES ON ALUMINUM-BRONZE AGING MANAGEMENT PROGRAMS, FOR THE SOUTH TEXAS PROJECT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC. NOS. ME4936 AND ME4937) DISTRIBUTION: E-MAIL: PUBLIC RidsNrrDlr Resource RidsNrrDlrRpb1 Resource RidsNrrDlrRpb2 Resource RidsNrrDlrRerb Resource RidsNrrDlrRpob Resource RidsNrrDraApla Resource RidsOgcMailCenter JDaily TIran DMclntyre, OPA BSingal, DORL WWalker, RIV JDixon, RIV BTharakan, RIV WMaier, RIV VDricks, RIV NOKeefe, RIV AVegel, RIV GPick, RIV