ML18038B988

Provides Notification That Util Completed Resolution of Outliers for Unit 2 Identified in Accordance W/Seismic Qualification Util Group Generic Implementation Procedure Criteria

ML18038B988
Person / Time
Site:	Browns Ferry
Issue date:	11/18/1997
From:	Abney T TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML18038B989	List: ML18038B988 ML18038B990
References
REF-GTECI-A-46, REF-GTECI-SC, TASK-A-46, TASK-OR GL-87-02, GL-87-2, GL-88-20, TAC-M69431, TAC-M83596, NUDOCS 9711260198
Download: ML18038B988 (12)

Text

CATEGORY 1 REGULAT Y INFORMATION DISTRIBUTZO YSTEM (RIDS)

ACCESSION NBR:9711260198 DOC.DATE: 97/11/18 NOTARIZED: NO DOCKET

&AC/L:50-260 Browns Ferry Nuclear Power Station, Unit 2, Tennessee 05000260 AUTH. ~lAME AUTHOR AFFILjATION 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 2 identified in accordance w/Seismic Qualification Utl Group generic implementation procedure criteria.

DISTRIBUTION CODE: A025D COPIES RECEIVED:LTR j ENCL l in Operating Plants SIZE:

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TITLE: Seismic Qualification of Equipment GL-87 E

NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL 0 OGC/HDS3 1, 1 PD2-3-PD 1 1 DEAGAZZO,A 1 1 R INTERNAL: ACRS 1 1 8 01 1 1 NRR/DE 1 1 NRR/DE/ECGB 1 1 NRR/DE/EMEB 2 2 NRR/DRCH/HHFB 1 1 NRR/DRCH/HICB 1 1 NRR/DRPE/PD1-3 1 1 NRR/DSSA/SRXB 1 1 EXTERNAL: NRC PDR 1 1 D

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NOTE TO ALL "RIDS" 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 14 ENCL 14

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Tennessee Valley Authority. Post Office Box 2000. Decatur. Alabama 36609 November 18, 1997 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:

In the Matter of Docket No. 50-260 Tennessee Valley Authority BROWNS FERRY NUCLEAR PLANT (BFN) UNIT 2 GENERIC LETTER (GL) 87 02 I SUPPLEMENT 1 I VERI FICATION OF SE ISMIC ADEQUACY OF MECHANICAL AND ELECTRI CAL EQUI PMENT IN OPERATING REACTORS I I I UNRESOLVED SAFETY SSUE (US ) A 4 6 I AND GL 88 20 I SUPPLEMENT 4 INDIVIDUAL PLANT EXAMINATION OF EXTERNAL EVENTS (IPEEE) FOR SEVERE ACCIDENT VULNERABILITIES (SEISMIC PORTION)

NOTIFICATION OF COMPLETION OF OUTLIER RESOLUTION (TAC NOS.

M69431, AND M83596)

This letter provides notification that TVA has completed the resolution of outliers for BFN Unit 2 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 (i.e., items of equipment that did not meet the walkdown screening criteria) identified during the seismic evaluations for mechanical and electrical equipment and electrical relays. For BFN Unit 3, the outliers identified were resolved during the Cycle 7 refueling outage and notification of completion provided to NRC by TVA letter 97<xaeoxea 97xxxs Q lllllillllilllilllllllllllllllllllllllll

.PDR,-'ADOCK 05000260 l P PDR

0 U.S. Nuclear Regulatory Commission

'age 2 November 18, 1997 dated April 11, 1997. The outliers identified for BFN Unit 2 were resolved by engineering evaluation,, plant modification, or maintenance work order during the Cycle 9 refueling outage that completed on October 19, 1997.

Enclosure 1 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 2, which notes changes for 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 2.

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

ncerel E. Abney Manager of Li nsin and Industr ffai s Enclosures cc (Enclosures):

Mr. Mark S. Lesser, Branch Chief U.S. Nuclear Regulatory Commission Region II 61 Forsyth Street, S.W.

Suite 23T85 Atlanta, Georgia 30303 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

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

UNIT 2 GENERIC LETTER (GL) 87 02 I SUPPLEMENT 1 I VERI'F 1 CATION OF SEISMIC ADEQUACY OF MECHANICAL AND EL'ECTRICAL EQUIPMENT .IN I I OPERATING REACTORS I UNRESOLVED SAFETY SSUE (US ) A 4 6 AND GL 88 20 I SUPPLEMENT 4 ~ INDIVIDUAL PLANT EXAMINATION OF EXTERNAL EVENTS (IPEEE) FOR SEVERE ACCIDENT VULNERABILITIES (SEISMIC PORTION)

BACKGROUND'NFORMATION 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. Supplement 1 to GL 87-02, 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 the GIP-2, including the clarifications, interpretations, and exceptions in the NRC 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 licensees expand 'the systematic examination for plant specific vulnerabilities to include considerat:-ion 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 letters also provided BFN's commitments regarding the seismic IPEEE evaluation. For BFN Units 2 and 3, TVA committed to submit'.-the results of the seismic IPEEE evaluation by June 28, -1'996.

Combined USI A-46 and seismic IPEEE walkdowns were performed in accordance with the SQUG GIP-2. Outliers (i.e , items of equipment that did not meet the walkdown,screening criteria) were identified during the seismic evaluations

ig for mechanical and electrical equipment and electrical

'relays. Seismic Evaluation and Relay Reports listed the outliers 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. 3 were resolved prior to restart from the Cycle 7 refueling outage that corn'pleted on March 13, 1997. A completion report for the BFN 'Unit 3 A-46 and seismic IPEEE program was submitted by TVA letter dated April 11, 1997. For Unit 2, the outliers were resolved prior to restart from the Cycle 9 refueling outage that completed on October 19, 1997. The BFN Unit 2 A-46 and seismic IPEEE program completion report is contained in Enclosure 2 of this letter.

E1-2

ig ENCLOSURE 2 TENNESSEE VALLEY AUTHORITY BROWNS FERRY NUCLEAR PLANT (BFN) 2 'NIT I

GENERI C LETTER (GL) 87 02 ~ SUPPLEMENT 1 ~ VERIF CATION OF SEISMIC ADEQUACY OF 'MECHANICAL AND ELECTRICAL'QUIPMENT IN I

OPERATING REACTORS ~ UNRESOLVED SAFETY ISSUE (US ) A 4 6 AND GL 88 20 ~ SUPPLEMENT 4 g INDIVIDUALPLANT EXAMINATION OF EXTERNAL EVENTS (IPEEE) FOR SEVERE ACCIDENT VULNERABILITIES (SEISMIC PORTION)

COMPLETION REPORT (See Attached)

i