ML17305A333

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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  Arizona Public Service icon.png
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:
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)DOCKET 05000528 05000529 05000530 P I szzE: A+A D DISTRIBUTION CODE: A001D COPIES RECEIVED:LTR C ENCL TITLE: OR Submittal:

General Distribution ACCESSION NBR:8911020138 DOC.DATE: 89/10/25 NOTARIZED:

NO FACIL:STN-50-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi STN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi STN-50-530 Palo Verde Nuclear Station, Unit 3, Arizona Publi 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 eration caused by CEA drop events.NOTES: Standardized pl,ant.Standardized plant.S 05000528 05000529 j 05000530 h RECIPIENT ID CODE/NAME PD5 LA CHAN,T INTERNAL: ACRS NRR/DEST/ESB 8D NRR/DEST/MTB 9H NRR/DOEA/TSB 11 OC/AM 01 EXTERNAL: LPDR NSIC NOTES: COPIES LTTR ENCL 1 1 5 5 6 6 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 RECIPIENT ID CODE/NAME PD5 PD DAVIS,M.NRR/DEST/ADS 7E NRR/DEST/ICSB NRR/DEST/RSB 8E NUDOCS-ABSTRACT OGC/HDS1 RES/DSIR/EIB NRC PDR COPIES LTTR ENCL 1 1 5 5 1 1 1 1 1 1 1 1 1 0 1 1 1 1 D S TOTAL NUMBER OF COPIES REQUIRED: LTTR 33 ENCL 31 0 D h I, la IM Arizona Public Service Company P.O.BOX 53999~PHOENIX, ARIZONA 85072<999 WILLIAM F.CONWAY EXECUTIVE VICE PRESIDENT NUCLEAR 161-02523 WFC/RAB/JST 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

Dear Sirs:

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 if ground faults are known to exist in CEA coil assemblies and to modify the JCO.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(PDR A 8 89l025 89'p DOC<05ppp>28 Q peu i+i 7 mp 4 Document Control Desk U..S.Nuclear Regulatory Commission Page 2 161-02523 WFC/RAB/JST October 25, 1989 cc: J.B.Martin G.W..Knighton T.L.Chan M.J.Davis T.J.Polich (all w/attachment) i'[i ,J y~I