ML17305A333

Forwards Rev 3 to Justification for Continued Operation Control Element Assembly (CEA) Drop Events, Per 891020 Telcon.Discovery of Grounded Coil Assemblies in Unit 2 on 891014 Resulted in Reevaluation of Operating Plans

ML17305A333
Person / Time
Site:	Palo Verde
Issue date:	10/25/1989
From:	Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17305A334	List: ML17305A333 ML17305A335
References
161-02523-WFC-R, 161-2523-WFC-R, NUDOCS 8911020138
Download: ML17305A333 (6)

Text

~C CELERATED D BUTION DEMONS T10N SYFI'EM REGULA . Y INFORMATION DISTRIBUTI .. SYSTEM (RIDS)

ACCESSION NBR:8911020138 DOC.DATE: 89/10/25 NOTARIZED: NO DOCKET FACIL:STN-50-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi 05000528 STN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi 05000529 STN-50-530 Palo Verde Nuclear Station, Unit 3, Arizona Publi 05000530 AUTH. NAME AUTHOR AFFILIATION CONWAY,W.F. Arizona Public Service Co. (formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Con k)

SUBJECT:

Forwards Rev 3 to util justification for continued o P eration caused by CEA drop events. I DISTRIBUTION CODE: A001D TITLE: OR COPIES RECEIVED:LTR Submittal: General Distribution C

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NOTES:

Standardized pl,ant.

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05000528 05000529 05000530 j

h RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA 1 1 PD5 PD 1 1 CHAN,T 5 5 DAVIS,M. 5 5 INTERNAL: ACRS 6 6 NRR/DEST/ADS 7E 1 1 NRR/DEST/ESB 8D 1 1 NRR/DEST/ICSB 1 1 NRR/DEST/MTB 9H 1 1 NRR/DEST/RSB 8E 1 1 NRR/DOEA/TSB 11 1 1 NUDOCS-ABSTRACT 1 1 OC/AM 1 0 OGC/HDS1 1 0 01 1 1 RES/DSIR/EIB 1 1 EXTERNAL: LPDR 1 1 NRC PDR 1 1 NSIC 1 1 NOTES: 1 1 D

S TOTAL NUMBER OF COPIES REQUIRED: LTTR 33 ENCL 31

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Arizona Public Service Company P.O. BOX 53999 ~ PHOENIX, ARIZONA85072<999 WILLIAMF. CONWAY 161-02523 WFC/RAB/JST EXECUTIVEVICE PRESIDENT NUCLEAR October 25, 1989 Docket Nos. STN 50-528/529/530 Document Control Desk U. S. Nuclear Regulatory Commission Mail Station Pl-37 Washington, D.C. 20555

Reference:

Letter from W. F. Conway (APS) to USNRC dated July 27, 1989.

Subject:

Justification for Continued Operation as a Result of CEA Drop Events, Revision 1

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Units 1, 2, and 3 Justification for Continued Operation as a Re'suit of CEA Drop Events, Revision 3 File: 89-A-056-026 The referenced letter submitted a Justification for Continued Operation (JCO) of the PVNGS units based on information concerning events in which Control Element Assemblies (CEA) dropped or slipped into the core during CEA motion.

It provided a plan for operation and corrective action based on events and testing which were known at that time.

The discovery of grounded coil assemblies in Unit 2 on October 14, 1989 has caused APS to re-evaluate the operating plans in CEA coil assemblies and to modify the JCO.

if ground faults are known to exist Attached to this letter is Revision 3 of the subject JCO. Based on a discussion of Revision 2 with NRR and Region V personnel in a phone call on October 20, 1989, APS has clarified sections in which the Staff had questions.

If you should have any further questions, please call R. A. Bernier at (602) 371-4295.

Sincerely, WFC/RAB/j le Attachment ot(

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161-02523 WFC/RAB/JST October 25, 1989 Document Control Desk U.. S. Nuclear Regulatory Commission Page 2 cc: J. B. Martin (all w/attachment)

G. W.. Knighton T. L. Chan M. J. Davis T. J. Polich

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