ML17313A679

Forwards LER 98-003-01,IAW 10CFR50.73.Interim Corrective Actions Which Were Implemented to Control Fbt Blocking, Have Subsquently Been Discontinued Based Upon More Recent Analysis

ML17313A679
Person / Time
Site:	Palo Verde
Issue date:	11/09/1998
From:	Overbeck G ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17313A680	List: ML17313A679
References
192-01035-GRO-D, 192-1035-GRO-D, NUDOCS 9811180071
Download: ML17313A679 (4)

Text

CATEGORY 1~

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RZDS)

ACCESSION NBR:9811180071 'OC.DATE: 98/11/09 NOTARIZED: NO DOCKET FACIL:STN-50-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi 05000528 AUTH.NAME AUTHOR AFFILIATION OVERBECK,G.R. Arizona Public Service Co. (formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Records Management Branch (Document Control Desk)'UBJECT:

Forwards LER 98-003-01,IAW 10CFR50.73.Intermin corrective actions which were implemented to control FBT blocking, have subsquently been discontinued based upon more recent analysis.

DISTRIBUTION CODE: IE22T COPIES RECEIVED:L'TR ENCL TITLE: 50.73/50.9 Licensee>Event Report (LER), Incident Rpt, etc.

'IZE:

E NOTES: STANDARDIZED PLANT 05000528 G

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD4-2 PD 1 1 FIELDS,M 1 1 INTERNAL: ACRS 1 1 AEO Q B 2 2 AEOD/SPD/RRAB 1 1 1 1 NRR/DE/ECGB 1 1 NRR/DE/EELB 1 1 NRR/DE/EMEB 1 1 NRR/DRCH/HICB 1 1 NRR/DRCH/HOHB 1 "

1 NRR/DRCH/HQMB 1 1 NRR/DRPM/PECB 1 1 NRR/DSSA/SPLB 1 1 RES/DET/EZB 1 1 RGN4 FILE 01 1 1 D

EXTERNAL: L ST LOBBY WARD 1 1 LITCO BRYCE,J H 1 1 NOAC POORE,W. 1 1 NOAC QUEENER,DS 1 1

- NRC PDR 1 1 NUDOCS FULL TXT 1 1 NOTE TO ALTi "RZDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE. TO HAVE YOUR NAME OR ORGANIZATION REMOVED FROM DZSTRZBUTZON LISTS OR REDUCE THE NUMBER OF COPIES RECEIVED BY YOU OR YOUR ORGANIZATION, CONTACT THE DOCUMENT CONTROL DESK (DCD) ON EXTENSION 415-2083 FULL TEXT CONVERSION REQUIRED TOTAL NUMBER OF COP1ES REQUIRED: LTTR'3 ENCL 23 Pug

conrm//ment. Inner/an. Energy.

Gregg R Overbeck Mail Station 7602 Palo Verde Nuclear Vice President TEL 602/3934148 P.O. 8ox 52034 Generating Station Nuclear Production FAX 602/3936077 Phoenix, AZ 85072-2034 192 P1P35. GR0/nt:~/RAS November 9,. 1998 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-37 Washington, DC 20555-0001

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Units 1,2, and 3 Docket Nos. STN 50-528/529/530 License Nos. NPF41/51/74 Supplement to Licensee Event Report 98403 Attached please find supplement 1 to Licensee Event Report (LER)98-003 prepared and submitted pursuant to 10 CFR 50.73. This LER reports a previously unanalyzed condition which existed during periods when automatic fast bus transfer (FBT) capability was blocked to prevent.

the transfer of non-class plant equipment from the unit auxiliary transformer to the startup transformer.

This condition is no longer an unanalyzed condition because subsequent analysis has demonstrated that none of the Anticipated Operational Occurrences or Design Basis Events require FBT to be functional in order to mitigate the consequences or meet acceptance criteria for any accident. Interim corrective actions which were implemented to control FBT blocking, have subsequently been discontinued based upon the more recent analysis. APS makes no new regulatory commitments as a result of this LER supplement.

In accordance with 10CFR50.73(d), a copy of this LER is being fotwarded to the Regional Administrator, NRC Region IV. If you have questions regarding this submittal, please contact Daniel G. Marks, Section Leader, Regulatory Affairs, at (602) 393-6492.

Sincerely, GRO/DGM/RAS/rlh 98iii8007i PDR ADOCK 05000528 98ii09 8 PDR

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