ML12011A008

Summary of Telephone Conference Call Between the NRC and STP Nuclear Operating Company, Regarding Clarifications on Containment Tendon Prestress and One Request for Additional Information, for the South Texas Project, Units 1 and 2.

ML12011A008
Person / Time
Site:	South Texas
Issue date:	02/16/2012
From:	Daily J License Renewal Projects Branch 1
To:
Daily J
References
TAC ME4936, TAC ME4937
Download: ML12011A008 (6)

Text

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NUCLEAR REGULATORY COMMISSION

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LICENSEE:

STP Nuclear Operating Company FACILITY:

South Texas Project

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON JANUARY 4, 2012, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND STP NUCLEAR OPERATING COMPANY, REGARDING CLARIFICATIONS ON CONTAINMENT TENDON PRESTRESS AND ONE REQUEST FOR ADDITIONAL INFORMATION, 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 4, 2012, to discuss and clarify issues related to the applicant's containment tendon prestress programs and to discuss applicant questions regarding request for additional information (RAI) 4.7.3-2, for the South Texas Project, Units 1 and 2, license renewal application. The telephone conference call was useful in clarifying the questions and issues for both staff and applicant. 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 Docket Nos. 50-498 and 50-499

Enclosures:

As stated cc w/encls: Listserv

SUMMARY

OF TELEPHONE CONFERENCE CALL SOUTH TEXAS PRO~IECT LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS JANUARY 4, 2012 PARTICIPANTS AFFILIATIONS John Daily Nuclear Regulatory Commission (NRC)

Bill Holston Angela Buford NRC NRC I NRC John Wise James Gavula NRC Arden Aldridge STP Nuclear Operating Company (STPNOC)

Ken Taplett STPNOC Mark Wales STPNOC Gary Warner STARS Center of Business (COB)

Donald (Brett) Lynch COB ENCLOSURE 1

TELEPHONE CONFERENCE CALL SOUTH TEXAS PROJECT LICENSE RENEWAL APPLICATION JANUARY 4, 2012 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 4, 2012, to discuss and clarify the following issues and requests for additional information (RAls) related to the license renewal application (LRA).

The participants indicated that the call was useful in clarifying the questions discussed.

Issues and discussions:

Staff identified questions regarding LRA Section 4.5, "Absence of TLAA for Concrete Containment Tendon Prestress Analysis," and GALL AMP X.S1, for Containment Tendon Prestress. Staff noted apparent anomalies in the applicant's discussions related to the grouping of containment tendons, in tendon surveillance frequencies, scheduling and performance, and whether temperature effects have been factored in to predicted results, especially when related to guidance in Reg Guide 1.35 and ASME Code Section IWL. The applicant and the staff discussed these items and looked at various information and data already provided by the applicant in its RAI responses. With the exception of some issues pertaining to how the applicant applied its reasoning regarding interpretations of tendon surveillances at the three year point of a given unit's life, the information and discussion appeared to resolve the staff's questions. The staff indicated it would continue to review these items, and if further information is needed, then it will issue an RAI.

Applicant requested clarifying information on RAI4.7.3-2. The issue presented in RAI4.7.3~2 is that the staff is not convinced that visual inspections alone will be capable of prompting followup thickness measurements such that the 40-mil corrosion allowance will not be exceeded during the period of extended operation. The staff believes that visual examinations may need to be augmented with physical measurements, using tools such as inside calipers, to ensure that corrosion is not approaching the limit. Given that physical measurements might be required to augment the visual inspections, or alternatively, some sort of sampling inspection performed to validate that the visual inspections are performing adequately, the RAI requests further details on how the program will manage this time-limited aging analysis, such as how often physical measurements will be conducted, how many locations will be checked, how the most susceptible location will be selected, what devices will be used, and the criteria that would result in a followup volumetric examination. The staff and the applicant discussed this viewpoint and the applicant indicated that it now better understands the staff's concerns; the applicant indicated it would consider these things in preparing its response.

ENCLOSURE 2

Memorandum to File from J. Daily dated January xx, 2012

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON JANUARY 4, 2012, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND STP NUCLEAR OPERATING COMPANY, REGARDING CLARIFICATIONS ON CONTAINMENT TENDON PRESTRESS AND ONE REQUEST FOR ADDITIONAL INFORMATION, FOR THE SOUTH TEXAS PROJECT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC. NOS. ME4936 and ME4937)

DISTRI BUTION:

E-MAIL:

PUBLIC RidsNrrDlr Resource RidsNrrDlrRpb1 Resource RidsNrrDlrRpb2 Resource RidsNrrDlrRerb Resource RidsNrrDlrRpob Resource RidsNrrDraApla Resource RidsOgcMailCenter JDaily TTran DMclntyr,OPA BSingal, DORL WWalker, RIV JDixon, RIV BTharakan, RIV WMaier, RIV VDricks, RIV NOKeefe, RIV AVegel, RIV GPick, RIV

LICENSEE:

STP Nuclear Operating Company FACILITY:

South Texas Project

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON JANUARY 4, 2012, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND STP NUCLEAR OPERATING COMPANY, REGARDING CLARIFICATIONS ON CONTAINMENT TENDON PRESTRESS AND ONE REQUEST FOR ADDITIONAL INFORMATION, 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 4, 2012, to discuss and clarify issues related to the applicant's containment tendon prestress programs and to discuss applicant questions regarding request for additional information (RAI) 4.7.3-2, for the South Texas Project, Units 1 and 2, license renewal application. The telephone conference call was useful in clarifying the questions and issues for both staff and applicant. 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.

IRA DMorey forI 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'.. ML12011A008 OFFICE LA:DLR PM:RPB1 :DLR BC:RPB1 :DLR PM:RPB1:DLR NAME YEdmonds JDaily DMorey JDailylDMorey for DATE 02/08/12 02/13112 02/16/12 02/16/12 OFFICIAL RECORD COpy

Memorandum to File from J. Daily dated February 16, 2012

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON JANUARY 4, 2012, BElWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND STP NUCLEAR OPERATING COMPANY, REGARDING CLARIFICATIONS ON CONTAINMENT TENDON PRESTRESS AND ONE REQUEST FOR ADDITIONAL INFORMATION, 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 DMclntyr,OPA BSingal, DORL WWalker, RIV JDixon, RIV BTharakan, RIV WMaier, RIV VDricks, RI V NOKeefe, RIV AVegel, RIV GPick, RIV