ML18036B337

Informs of Licensee Completion of Post Restart Portion of Design Baseline Verification Program,Phase II

ML18036B337
Person / Time
Site:	Browns Ferry
Issue date:	06/24/1993
From:	Salas P TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9306300173
Download: ML18036B337 (10)

Text

ACCEI ERAT DOCVMKNT DIST UTION SYSTEM REGULAT INFORMATION DISTRIBUTION STEM (RIDS)

ACCESSION NBR:9306300173 DOC.DATE: 93/06/24 NOTARIZED: NO DOCKET g FACIL:50-260 Browns Ferry Nuclear Power Station, Unit 2, Tennessee 05000260 AUTH. NAME AUTHOR AFFILIATION SALAS,P. Tennessee Valley Authority RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Informs of licensee completion of post restart portion of design baseline verification program for Unit 2.

DISTRIBUTION CODE: D030D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: TVA Facilities Routine Correspondence NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL INTERNAL: ACRS 6 6 NRR/DSSA 1 1 OC CB 1 0 OGC/HDS3 1 0 E ILE 01 1 1 RES/DE/SSEB/SES 1 1 EXTERNAL: NRC PDR 1 1 NSIC 1 1 NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTEI CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 504-2065) TO EUMINATE YOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEEDI TOTAL NUMBER OF COPIES REQUIRED: LTTR 13 ENCL 11

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Tennessee Valley Authority. Post Office Box 2000. Oecatur, Alabama 35609 June 24, 1993 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555 Gentlemen:

In the Matter of ) Docket Nos. 50-260 Tennessee Valley Authority )

BROWNS FERRY NUCLEAR PLANT (BFN) COMPLETION OF COMMITMENT FOR UNIT 2 CYCLE 6 FOR DESIGN BASELINE VERIFICATION PROGRAM (DBVP) PHASE II This letter provides notification that TVA has completed the post restart portion (Phase II) of the Design Baseline Verification Program (DBVP) for BFN Unit 2. Additionally, this letter provides a description of changes in the scope of DBVP, phase II which depart from wording previously submitted to NRC.

Revision 4 of the DBVP Program Plan was submitted for NRC review in Reference 1 and is described in section III.2.2 of Revision 2 to the Browns Ferry Nuclear Performance Plan (Reference 2). DBVP Phase I was completed prior to Unit 2 Cycle 6 operation and was comprised of those systems or portions of systems required for the safe shutdown of the plant as identified in Chapter 14 of the BFN Final Safety Analysis Report (FSAR). Phase II extended the program to include the balance of the safety-related functions and was completed prior to Unit 2 Cycle 7 operation.

noted that portions of Phase II are to be It should be addressed as part of the NRC's Seismic Qualification of Equipment Program (Unresolved Safety Issue [USI] A-46).

In Reference 4 TVA committed to provide descriptions of how the wording of Unit 2 Cycle 6 commitment closures differs from the wording previously submitted to NRC. In Reference 5, TVA responded to a pre-restart (Unit 2 Cycle 6) request by NRC to identify those systems within the scope of DBVP Phase II. The enclosure to Reference 5 listed the system mode descriptions for DBVP Phase II. Subsequent to the restart of Unit 2, the DBVP System Mode Requirements Calculation was revised in accordance with the methodology described in the 9306300173 930'624' PDR ADOCK 05000260 P PDR

I June 24, 1993 U.S. Nuclear Regulatory Commission DBVP Program Plan (Reference 1). As a result, the system mode requirements for DBVP Phase II changed from those previously submitted in Reference 5. The enclosure to this letter provides a summary of the differences between the scope of DBVP Phase II submitted to NRC in Reference 5 and the scope at the time of program closure.

TVA considers the changes in DBVP Phase II scope to be consistent with the methodology and content described in the DBVP Program Plan previously accepted by the staff (Reference 3).

There are .no additional commitments contained in this letter.

If you have any questions, please telephone me at (205) 729-2636.

Sincerely, Pedro Salas Manager of Site Licensing Enclosure cc (Enclosure):

Mr. R'. V. Crlenjak, Project Chief U.S. Nuclear Regulatory Commission II Marietta Street, NW, Suite 2900

'egion 101 Atlanta, Georgia 30323 NRC Resident Inspector Browns Ferry Nuclear Plant Route 12, Box 637 Athens, Alabama 35611 Mr. Thierry M. Ross, Project Manager U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852

4 June 24, 1993

.U.S. Nuclear Regulatory.'Commission

References:

1. TVA letter to NRC dated: March 25, 1988, Design 'Baseline and Verification Program (DBVP) ,Program. Plan, Revision 4

2. TVA letter to .NRC dated October 24, 1988, Nuclear Performance Plan, Revision 2

3. NRC letter to TVA dated January 23, 1991, NUREG-1232, Volume 3, Supplement 2 Browns Ferry Unit 2 [Section 2'.1, Page 2-1]

4. TVA letter to NRC dated May 24,, 1993, Completion of Commitments for Unit 2 Cycle 6 Outage and Response to Related Issues

5. TVA letter to NRC, dated May 3, 1991, Request for Additional Information on TVA's Design Baseline Verification Program (DBVP)

Phase II

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ENCLOSURE BROWNS FERRY NUCLEAR PLANT UNIT 2 DESIGN BASELINE, VERIFICATION PROGRAM PHASE II Listed below are those systems that .were not id'entified in Reference 5,. with .portions added to the scope of DBVP Phase II in accordance with the DBVP Program Plan:,

SYSTEM NO. DESCRIPTION'O>

39 Fire Protection 65 Standby Gas Treatment 67 Emergency Equipment Cooling Water 70 Reactor Building Closed Cooling Water

'74 Residual Heat Removal 78 Fuel Pool Cooling Listed below are those systems identified in Reference 5 that were determined'not required" for DBVP 'Phase, II in accordance with the DBVP Program Plan:

SYSTEM NO. DESCRIPTION 32 Control Air 84 Containment Atmosphere Dilution

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