ML18038B857

Provides Notification That Util Completed Resolution of Outliers for Unit 3 Identified in Accordance W/Seismic Qualification Util Group Generic Implementation Procedure Criteria

ML18038B857
Person / Time
Site:	Browns Ferry
Issue date:	04/11/1997
From:	Abney T TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML18038B858	List: ML18038B857 ML18038B859
References
REF-GTECI-A-46, REF-GTECI-SC, TASK-A-46, TASK-OR GL-87-02, GL-87-2, GL-88-20, TAC-M69432, TAC-M83597, NUDOCS 9704220047
Download: ML18038B857 (12)

Text

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REGULATI INFORMATION DISTRIBUTIONISTEM A'CCESSIOt'?/BR:9704220047 DOC'.,DATE: 97/04/11 . NOTARIZED: NO ,D.O.C K ET FACIE..;5d-296 Browns Ferry Nuclear Power Station, Unit 3, Tennessee 05000296 AUZH':NAME'UTHOR AFFILIATION ABNEY,T.E. Tennessee Valley Authority RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Provides notification that util completed. resolution of outliers for Unit 3 identified in accordance w/Seismic Qualification Util Group Generic Implementation Procedure criteria. A DISTRIBUTION CODE: A011D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: Generic Ltr 88-20 re Individual Plant Evaluations T NOTES RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL 0

PD2-3-PD 1 1 WILLIAMS,J. 1 1 INTERNAL: "HOVSTO 1 1 AEOD/SPD/RRAB 1 1 ILE CENTER 0 1 1 NRR/DRPE/PD1-3 1 1 1 1 NRR/DSSA/SPSB 1 1 RES/DST/IPEEE 1 1 RES/PRAB 3 3 RGN 1 1 1 RGN 2 1 1 RGN 3 1 1 RGN 4 1 1 EXTERNAL: LITCO-BRYCE,J. 1 1 NOAC 1 1 NRC PDR 1 l.

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NOTE TO ALL "RIDSM RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE. TO HAVE YOUR NAME OR ORGANIZATION REMOVED FROM DISTRIBUTION LISTS OR REDUCE THE NUMBER OF COPIES RECEIVED BY YOU OR YOUR ORGANIZATION, CONTACT THE DOCUMENT CONTROL DESK (DCD) ON EXTENSION 415-2083 TOTAL NUMBER OF COPIES REQUIRED: LTTR ~

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Tennessee Valley Authority, Post Office Box 2000, Decatur, Alabama 35609-2000 April 11, 1997 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:

In the Matter of Docket No. 50-296 Tennessee Valley Authority BROWNS FERRY NUCLEAR PLANT (BFN) - UNIT 3 - GENERIC LETTER (GL) 87-02, SUPPLEMENT 1, VERIFICATION OF SEISMIC ADEQUACY OF MECHANICAL AND ELECTRI CAL EQUI PMENT IN OPERATI NG REACTORS r UNRESOLVED SAFETY ISSUE (USI) A-46, AND GL 88-20, SUPPLEMENT 4, INDIVIDUAL PLANT EXAMINATION OF'XTERNAL EVENTS (IPEEE)

FOR SEVERE ACCIDENT VULNERABILITIES (SEISMIC PORTION)

NOTIFICATION OF COMPLETION OF OUTLIER RESOLUTION (TAC NOS.

M69432, AND M83597)

This letter provides notification that TVA has completed the resolution of outliers for BFN Unit 3 identified in accordance with the Seismic Qualification Utility Group (SQUG) Generic Implementation Procedure (GIP) criteria.

TVA submitted Seismic Evaluation Reports that summarized the results of the USI A-46 and seismic IPEEE programs for BFN Units 2 and 3 by, letter dated June 28, 1996. These reports listed outliers that were identified during the seismic evaluations for mechanical and electrical equipment and electrical relays. The outliers identified for BFN Unit 3 were resolved, during the Cycle 7 re cling ou age that completed on March 13, 1997.

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U:S. Nuclear Regulatory Commission Page 2 April 11, 1997 to this letter provides background information regarding the BFN commitments to GL 87-02 and GL 88-20, Supplement 4. Enclosure 2 contains a completion report for BFN Unit 3 which notes changes made to some of the outlier resolutions listed in the Seismic Evaluation Report submitted by TVA letter dated June 28, 1996. TVA considers the commitments regarding USI A-46 and the seismic portion of IPEEE to be complete for BFN Unit 3.

There are no commitments contained in this letter. If you have any questions, please contact me at (205) 729-2636.

Si cerely, Abney Manager of Lic nsing and Industry ffair Enclosures cc (Enclosures):

Mr. Mark S. Lesser, Branch Chief U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 NRC Resident Inspector Browns Ferry Nuclear Plant 10833 Shaw Road Athens, Alabama 35611 Mr. J. F. Williams, Project Manager U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852

ENCLOSURE 1 TENNESSEE VALLEY AUTHORITY BROWNS FERRY NUCLEAR PLANT (BFN)

UNIT 3 GENERIC 'LETTER (GL) 87-02, SUPPLEMENT 1, VERIFICATION OF SEISMIC ADEQUACY OF MECHANICAL AND ELECTRICAL EQUIPMENT IN OPERATING REACTORS, UNRESOLVED SAFETY ISSUE (USI) A-46 AND GL 88-20, SUPPLEMENT 4, INDIVIDUAL PLANT EXAMINATION OF EXTERNAL EVENTS (IPEEE) FOR SEVERE ACCIDENT VULNERABILITIES, (SEISMIC PORTION)

BACKGROUND INFORMATION In GL 87-02, NRC established the process for resolution of USI A-46 and encouraged the affected licensees to participate in a generic program. In Supplement 1 to GL 87-02, the staff required a response that included a commitment to the Generic Implementation Procedure, Revision 2, (GIP-2) prepared by the Seismic Qualification Utility Group (SQUG), a schedule for implementation of the GIP-2, and submission of a report summarizing the results of the USI A-46 program. By letters to NRC dated September 21, 1992, January 19, .1993, and March 19, 1996, TVA committed to implement GIP-2, including the c'larifications, interpretations, and exceptions in NRC s Supplemental Safety Evaluation Report Number Two (SSER-2), and to communicate to the staff any significant or programmatic deviations from the GIP-2 guidance. For BFN Units 2 and 3, TVA committed to submit the results of the USI A-46 evaluation by June 28, 1996.

On June 28, 1991, NRC issued GL 88-20, Supplement 4, which requested that the systematic examination for plant specific vulnerabilities be expanded to include the consideration. of five external events. Included in the five external events are seismic events. By letter dated December 20, 1991, TVA committed to address the seismic portion of the IPEEE within 120 days after NRC issued an SSER that resolved USI A-46. The above referenced TVA to NRC letters that addressed the USI A-46 program also provided the BFN commitments regarding the seismic,IPEEE

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evaluation. For BFN Units 2 and 3, TVA committed to submit the results of the seismic IPEEE evaluation by June 28, 1996.

Combined USI A-46 and seismic IPEEE walkdowns, were performed in accordance with the SQUG GIP-2. Outliers were identified during the seismic evaluations for mechanical and electrical equipment and electrical relays that did not meet the GIP-2 criteria.

Seismic Evaluation and Relay Reports listed the outliers that were identified during these evaluations. The reports were submitted by TVA letter dated June 28, 1996. In that letter, TVA committed to resolve the outliers for Units 2 and 3 prior to restart from the next refueling outage for each unit. The outliers for Unit 2 will be resolved prior to restart from the Cycle 9 refueling outage scheduled to begin on September 21, 1997. The outliers identified for Unit 3 were resolved prior to restart from the Cycle 7 refueling outage that completed on March 1'3, 1997.

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ENCLOSURE 2 TENNESSEE VALLEY AUTHORITY BROGANS FERRY NUCLEAR PLANT (BFN)

UNIT 3 GENERIC LETTER (GL) 87-02, SUPPLEMENT 1, VERIFICATION OF SEISMIC ADEQUACY OF MECHANICAL AND ELECTRICAL EQUIPMENT IN OPERATING REACTORS, UNRESOLVED SAFETY ISSUE (USI) A-46 AND 'GL 88-20/

SUPPLEMENT 4, INDIVIDUAL,PLANT EXAMINATION OF EXTERNAL EVENTS (IPEEE) FOR SEVERE ACCIDENT VULNERABILITIESi (SEISMIC PORTION)

COMPLETION REPORT (See Attached)

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