ML20098E019

Responds to GL 91-06 Re Resolution of GI A-30,concerning Adequacy of safety-related DC Power Supplies

ML20098E019
Person / Time
Site:	Browns Ferry
Issue date:	05/27/1992
From:	Baron R TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-GTECI-A-30, REF-GTECI-EL, TASK-A-30, TASK-OR GL-91-06, GL-91-6, NUDOCS 9206010191
Download: ML20098E019 (3)

Text

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d wnese vw, Ad?(F4 Ftst 0+ fro Eh Mo Dacator Alatema 3%D9 i

May 27, 1992 1

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i U.S. Nuclear Regulatory Commission 1 ATTN: Document Control Desk

Washington, D.C. 20555 i

Gentlemen:

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In the Matter of ) Docket Nos. 50-259

Tennessee Valley Authority ) 50-260 296 ,

BROWNS FERRY NUCLEAR PLANT (BFN) - UNITS 1,.2,. ND A 3 - SUPPISMENTAL j RESPONSE TO GENERIC LETTER (GL) 91-06, RESOLUTION OF GENERIC ISSUE _(GI) i A-30, ADEQUACY OF SAFETY-RELATED DC POWER SUPPLIES 4

Reference:

TVA to NRC letter dated October.28, 1991, Response to' Generic 4

Letter 91-06, Resolution of Generic Issue A-30, " Adequacy of

! Safety-Related DC Power Supplies," Pursuanc to 10 CFR 50.54(f).

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A conference- call was held between BFN personne1 'and Mr. J.! F.- Williams,_

Nuclear Reactor Regulation, on January 27, 1992 to discuss BFN's response to GL 91-06 (Reference). During the telecon, the~four' commitments listed on Enclosure 2 of the reference letter were discussed. Commitments 1,;2, and 3 documented BFN's intention to revise its procedures to provide-for l

collection of Lus voltmeter and battery ammater data each shift on the 250V DC Unit Batteries, 250V DC Shutdown Batteries, and the 125V DC

- Diesel Generator Batteries. These commitments should-have stated that 1 this data will-be-collected daily instead of each shift. 'Due to the i large number of battery systems installed at BFN, a'significant amount of battery data must be collected.- Reasonable manpower resourec. allocation precludes the collection of all of the. data each shift. BFN has

. apportioned the battery data collection among the Operations shifts to-ensure.that all of the data is collected daily. Commitments 1, 2, and 3 are restated on the. Enclosure to correctly reflect the daily _ data collection frequency. Commitment 4 is unchanged.-

All_of the commitments made-in response to the-GL have been' completed.

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0-G01-300-1, Operations Routine Sheets, has been revised to include collection of bus _ voltmeter and battery ammeter. data --Alarm Response-

i. Procedure. 0-ARP-9-26. has_been issued to address one 250V DC Battery Charger Failure annunciator window which had not;been incluted in BFN's alarm response procedures, 9206010191 920527- -

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4 FDR 'ADOCK 05000259-P PDR

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o ENCLOSURE 4

RESTATEMENT OF THE COMMITMENTS MADE IN RESPONSE TO GENERIC LETTER 91-06

1. TVA vill add procedures to provide for reading the bus (250V DC Unit Batteties) voltmeters and battery ammeters daily.

2. TVA vill add procedures to provide for reading the bus (250V DC Shutdown Board Batteries) voltmeters and battery ammeters daily.

3. TVA vill add procedures to provide for reading the bus (125V DC Diesel Generator Batteries) voltmeters and battery ammeters daily.

4. Written procedures will be prepared to respond to the alarms and indications listed in question 3.

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• 2-U.S. Nuclear Regulatory Commission May 27, 1992 If you have any questions, please contact me at (205) 729-7566.

Sincerely,

'ht b$'M_

R. R. Baron Manager of Site Licensing In the absence of 0. J. Zeringue Vice President, Browns Ferry Operations Subscribed,fndsworngobeforeme ay on this day of 1992.

2 @tbGAn ) k. RR Ct1 Hotary-Public 10-30-94

.My Commission Explres Enclosure cc (Enclosure):

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,I, orth 11555 Rockville Pike Rockville, Maryland- 20852 Mr. B. A. Wilson, Project Chief U.S. Nuclear Regulatory Commission Region II-101 Marietta Street, NW,' Suite 2900 Atlanta, Georgia 30323

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