ML12080A044

STP - Record of Conference Call-02092012 on RAIs-TLAAs

ML12080A044
Person / Time
Site:	South Texas
Issue date:	04/11/2012
From:	Daily J License Renewal Projects Branch 1
To:	License Renewal Projects Branch 1
Daily J
References
TAC ME4936, TAC ME4937
Download: ML12080A044 (5)

Text

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UNITED STATES

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NUCLEAR REGULATORY COMMISSION

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WASHINGTON, D.C. 20555-0001 0

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April 11, 2012

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~o LICENSEE:

STP Nuclear Operating Company FACILITY:

South Texas Project

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON FEBRUARY 9, 2012, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND STP NUCLEAR OPERATING COMPANY, REGARDING REQUESTS FOR ADDITIONAL INFORMATION ON TLAA EXEMPTIONS, 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 February 9, 2012, to discuss requests for additional information (RAls) on the applicant's Time limited Aging Analysis (TLAA) exemptions, for the South Texas Project, Units 1 and 2, license renewal application. The telephone conference call was useful in clarifying the staffs requests and the applicant's questions for the RAls. provides a listing of the participants and Enclosure 2 contains a summary of the discussion.

The applicant had an opportunity to comment on this summary.

Jo~~

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

TELEPHONE CONFERENCE CALL SOUTH TEXAS PROJECT LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS February 9,2012 PARTICIPANTS AFFILIATIONS John Daily Nuclear Regulatory Commission (NRC)

Jim Medoff NRC Arden Aldridge STP Nuclear Operating Company (STPNOC)

GaryWamer STARS Center of Business - Worley Parsons Donald Lynch STARS Center of Business - Worley Parsons ENCLOSURE 1

CONFERENCE CALL WITH STPNOC REGARDING TLAA EXEMPTIONS STP LICENSE RENEWAL APPLICATION February 9, 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 February 9,2012, to discuss requests for additional information (RAls) on the applicant's Time limited Aging Analysis (TLAA) exemptions, for the South Texas Project, Units 1 and 2, license renewal application.

The participants indicated that the calls were useful in clarifying the questions discussed.

Discussion:

The staff and the applicant discussed the following:

TLAA Exemptions (LRA Section 4.1)

RAI4.1-3a, (Clarifications for RG 1.43 compliance)

The staff explained that, regarding the applicant's response to RAI 4.1-3, the applicant based its "absence of a TLAA" conclusion for the RV SA-50S Class 2 forging components upon criteria that were established in Regulatory Guide (RG) 1.43 and not on the activities or analyses that were implemented in the current licensing basis (CLB) in order to conform to the weld qualification test criteria in RG 1.43. The staff also noted in addition that the applicant's conclusion was not based on a comparison of these activities or evaluations to the criteria for identifying TLAAs in 10 CFR 54.3. The staff indicated that more documentation would be needed so that the staff can complete its evaluation of the applicant's position.

RAJ 4.1-5a (Vibratory analysis and TLAA Basis)

The staff noted that in the applicant's response to RAI 4.1-5 (November 21,2011), the applicant identified that Westinghouse proprietary reports WCAP-7879, WCAP-8766-P-A, and WCAP-9946 were relied upon as part of the CLB for conforming to RG 1.20, and that the methodologies in these reports include high cycle fatigue modeling analyses that evaluate the impact of flow induced vibrations of the measured strains for the components. The staff also noted that these WCAP high cycle fatigue analyses conform to Criteria 1, 2, 4, 5, and 6 for defining TLAAs in 10 CFR 54.3.

Furthermore, since the assumption of vibratory cycles in the fatigue analyses is a time dependent parameter that is analyzed in the reports, the staff noted that these analyses are time-dependent; thus, the applicant's "absence of a TLAA" basis is valid only if the applicant can establish that the vibratory fatigue analyses in the reports were not defined in terms of the current operating life for the units (i.e., for example, on a 40-year operating basis).

As a result of the discussions, the applicant indicated it understood the staffs issues and would formulate responses to address them.

ENCLOSURE 2

LICENSEE:

STP Nuclear Operating Company FACILITY:

South Texas Project

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON FEBRUARY 9, 2012, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND STP NUCLEAR OPERATING COMPANY, REGARDING REQUESTS FOR ADDITIONAL INFORMATION ON TLM EXEMPTIONS, 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 February 9, 2012, to discuss requests for additional information (RAls) on the applicant's Time limited Aging Analysis (TLM) exemptions, for the South Texas Project, Units 1 and 2, license renewal application. The telephone conference call was useful in clarifying the staff's requests and the applicant's questions for the RAls. provides a listing of the participants and Enclosure 2 contains a summary of the discussion.

The applicant had an opportunity to comment on this summary.

IRA!

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 1\\10... ML12080a044 OFFICE LA: RPB1:DLR PM:RPB1 :DLR BC:RPB1:DLR PM:RPB1 :DLR NAME YEdmonds JDaily DMorey JDaily DATE 4/3/12 4/5/12 4/5/12 4/11 112 OFFICIAL RECORD COPY

Memorandum to file from J. Daily dated April 11, 2012

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON FEBRUARY 9, 2012, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND STP NUCLEAR OPERATING COMPANY, REGARDING REQUESTS FOR ADDITIONAL INFORMATION ON TLAA EXEMPTIONS, FOR THE SOUTH TEXAS PROJECT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC.

NOS. ME4936 AND ME4937)

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