ML17312A687

Rev 1 to Special Rept 2-SR-96-001,on 960404,alert Declared Due to Fire in Voltage Regulator for CR & Remote Shutdown Panel Essential Lighting,Clarifying Status of Power to UPS 2EQDNN02.Further Investigations Into Event Being Performed

ML17312A687
Person / Time
Site:	Palo Verde
Issue date:	04/05/1996
From:	James M. Levine ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
192-00963-JML-B, 192-963-JML-B, 2-SR-96-001, 2-SR-96-1, NUDOCS 9604160423
Download: ML17312A687 (8)

Text

CATEGORY 1 REGULATORY INFORMATION DISTRIBUTiON SYSTEM (RIDS)

ACCESSION NBR:9604160423 96/04/05 FACIL:STN-50-529 Palo Verde Nuc'ear S"ation, Unit 2, Arizona Publi 05000529I DOC.DATE: NOTARIZED: NO DOCKET AUTH. NAME AUTHOR AFFILIATION LEVINE,J.M. Arizona Public Service Co. (formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT; Rev 1 to Special Rept 2-SR-96-001,on 960404,alert declared due to fire in voltage regulator for CR 6 remote shutdown pane'ssential lighting,clar'fy.'ng status of power to UPS 2EQDNN02.Further investiga='ons .'nto e rent being performed.

DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR I ENCL I SIZE:

TITLE: 50.73/50.9 Licens~~ Event Report (LER), Incident Rpt, etc.

E NOTES:Standardized plant. 05000529 G

REC.PIENT COPIES RECIPIENT COPIES 0 D CODE/NAME LTTR ENCL ID CODE/NAME 'TTR ENCL PD4-2 PD 1 1 THOMASPC 1 1 INTERNAI: ACRS 1 1 AEOD SPD RAB 2 2 AEOD/SPD/RRAB 1 1 CE TE 1 1 NRR/DE/ECGB 1 1 E EELB 1 1 NRR/DE/EMEB 1 1 NRR/DRCH/HHFB 1 1 NRR/DRCH/HICB 1 1 NRR/DRCH/HOLB 1 1 NRR/DRCH/HQMB 1 1 NRR/DRPM/PECB 1 1 NRR/DSSA/SPLB 1 1 NRR/DSSA/SRXB 1 1 RES/DSIR/EIB 1 1 RGN4 FILE 01 1 1 D EXTERNAL: L ST LOBBY WARD 1 1 LITCO BRYCEPJ H 2 2 NOAC MURPHY,G.A 1 1 NOAC POORE,W. 1 1 NRC PDR 1 1 NUDOCS FULL TXT 1 1 NOTE TO ALL "RIDSN RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM OWFN SD-5(EXT. 415-2083) TO ELIMINATE YOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 26 ENCL 26

Arizona Public Service Company PALO VERDE NUCLEAR GENERATING STATiON P 0 BOX 52034 ~ PHOENIX, ARIZONA 85072-2034 192-00963-JML/BAG/DRL JAMES M. LEVINE April 5, 1996 VICE RREEIDER NUCI,EAR RRODUC iON U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-37 Washington, DC 20555-0001

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Unit 2 Docket No. STN 50-529 (License No. NPF-51)

Special Report 2-SR-96-001, Revision 1 Enclosed please find Special Report 2-SR-96-001, Revision 1 prepared and submitted pursuant to PVNGS Emergency Plan Implementing Procedure (EPIP-03),

"Emergency Classification Implementing Actions". This report discusses a condition requiring the declaration of an Alert due to a fire in a voltage regulator for Control Room and Remote Shutdown Panel essential lighting and clarification for the status of power to 2EQDNN02.

If you have any questions, please contact Burton A. Grabo, Section Leader, Nuclear Regulatory Affairs, at (602) 393-6492.

Sincerely, GRO/BAG/DRL Attachment cc: L. J. Callan (all with attachment)

K. E. Perkins K. E. Johnston 9604i60423 960405 PDR ADOCK 05000539 S PDR >zP~

ENCLOSURE PALO VERDE NUCLEAR GENERATING STATION UNIT 2 ALERT DOCKET NO. 50-529, LICENSE NO. NPF-51 SPECIAL REPORT 2-SR-96-001, Revision 1

PALO VERDE NUCLEAR GENERATING STATION UNIT 2 ALERT DOCKET NO. 50-529, LICENSE NO. NPF-51 SPECIAL REPORT 2-SR-96-001, Revision 1 This Special Report is being provided pursuant to PVNGS Emergency Plan Implementing Procedure (EPIP-03), "Emergency Classification Implementing Actions" to report a condition requiring the declaration of an Alert for Palo Verde Unit 2 at approximately 1714 MST on April 4, 1996. The Alert was terminated at approximately 1807 MST on April 4, 1996.

On April 4, 1996, at approximately 1700 MST, Palo Verde Unit 2 was in Mode 6 (REFUELING) when a fault occurred in the voltage regulator for Control Room and Remote Shutdown Panel Essential Lighting (2EQBBV02) resulting in a fire in the 100 foot elevation of the Control building "B" Battery Equipment Room and smoke in the 140 foot elevation of the Control building Unintermptable Power Supply (2EQDNN02). Fire teams responded and both fires were considered out by 1735.

At approximately 1700 MST, a smoke condition was discovered on the 140 foot elevation of the Control Room area immediately behind the main control panel. This fire was identified at 2EQDNN02 which operators then down-powered. Light smoke was present in the local area.

Main Control Room access was not lost and evacuation of Control Room staF was not required.

HVAC equipment was switched to smoke removal mode and the smoke was quickly removed from the area. In addition, a second related fire was noted in the Control building "B" Battery Equipment Room and the event was classified as an Alert in accordance with EPIP-02. The Nuclear Regulatory Commission (NRC) Operations Center was notified at approximately 1810 MST.

At approximately 1807 MST on April 4, 1996, the Alert was terminated in accordance with EPIP-03. The fires caused a brief delay to work on the stuck fuel assembly. The assembly is now scheduled to be liAed and moved early Saturday morning. Further investigation into the circumstances surrounding this event is being performed in accordance with the APS Incident Investigation Program. The results of the investigation will be reported pursuant to 10CFR50.73.