ML17305A484

Confirms Compliance W/Agreed Upon Course of Action for Restart of Plant & Completion of Items Contained in Restart List,Per 890628 & 0807 Ltrs.Formal Unit 3 Restart Oversight Program Implemented.Unit Ready for Restart

ML17305A484
Person / Time
Site:	Palo Verde
Issue date:	12/24/1989
From:	Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
102-01554-WFC-T, 102-1554-WFC-T, NUDOCS 9001290244
Download: ML17305A484 (8)

Text

REGULATORY XNFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9001290244 DOC.DATE: 89/12/24 NOTARXZED-'O DOCKET FACIL:STN-50-530 Palo Verde Nuclear Station, Unit 3, Arizona Publi 05000530 AUTH.NAME AUTHOR"AFFILIATION CONWAY,M.F. Arizona Public Service Co. (formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION MARTIN,J.B. Region 5, Ofc of the Director

SUBJECT:

Confirms compliance w/agreed course of action for restart of facility.

DISTRIBUTION CODE: IE26D COPIES RECEIVED:LTR ( ENCL SIZE:

TITLE: Startup Report/Refueling Report (per TecE Specs) S NOTES:Standardized plant. 05000530 RECXPXENT COPIES RECIPIENT COPIES XD CODE/NAME LTTR ENCL ZD CODE/NAME LTTR ENCL PD5 LA PD5 PD PETERSON,S.

INTERNAL: ACRS IRM TECH ADV NRR CHATTERTON NUDOCS-ABSTRACT REG PZ~OW RGN5 FILE 01 EXTERNAL: LPDR NRC PDR NSIC NOTES R

D S

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NOIR TO ALL "RIDS" RECIPIENIS:

PLEA% HELP US TO REDUCE %ASTE t CONI'ACI'HE DOCUMENI'ONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISrRIBUHON USIS FOR DOCUMENIS YOU DOUBT NEEDl TOTAL NUMBER OF COPIES REQUIRED: LTTR 18 ENCL ~ Q

Arizona Public Service Company P.Oi BOX 53999 ~ PHOENIX, ARIZONA 85072-3999 WILLIAMF. CONWAY 102-01554-WFC/TDS/LtJN EXECUTIVEVICEPRESIDENT NUCLEAR December 24,, 1989,! Il "I Mr. John B. Martin, Regional Administrator U.S. Nuclear Regulatory Commission Region V 1450 Maria Lane, Suite 210 Walnut Creek, CA 94596-5368

References:

(1) Letter from J. B. Martin, NRC, to W. F. Conway, ANPP, dated June 28, 1989.

(2) Letter from W. F. Conway, APS, to J ~ B. Martin, NRC, dated August 7, 1989.

Subject:

Palo Verde Nuclear Generating Station (PVNGS) Unit 3 Restart Docket No. STN 50-530 (License No. NPF-74)

File 89-056-026 This letter confirms compliance with the agreed upon course of action for the restart of PVNGS Unit 3 as outlined in Reference (1). With the modification of the item discussed in the next paragraph, this submittal also confirms completion of the items contained in the PVNGS Unit 3 Restart List which was provided to you as an attachment to Reference (2). The specific actions taken to address those items have been documented in individual closure packages previously provided to the NRC Senior Resident Inspector.

Record 91 in the Unit 3 Restart List provides for an inspection of all Reactor Coolant Pump seals to determine further the root cause of failure of the seals during the Unit 3 event on March 3, 1989. An engineering investigation of the 1B Reactor Coolant Pump seals determined the root cause of failure to be a thermal transient, caused by the flow of hot reactor coolant system water near normal control bleedoff flowrates with no interstage cooling or seal injection, which damaged all three seal stages. Since the root cause could be determined from the evaluation of the seals of one pump and was not associated with the design, construction, or assembly of the seals, inspection of the remaining pump seals would not contribute to a further determination of root cause. Therefore, as previously discussed with members of your staff, the objective of record 91 was accomplished in a manner different from that stated. All four (4) RCP seals have been replaced.

Although not a specific restart action as specified in Reference (1), APS has identified concerns for the operability of the Unit 3 Essential Turbine Driven Auxiliary Feedwater Pump, During testing of this pump following the refueling outage, abnormal suction and discharge pressure oscillations were noted. Further testing and analysis has determined the cause as discussed with NRC Region V on 9001290244 S91224 PDR AGOCK 05000530 P PDC

John B. Martin Page 2 December 22, 1989. A modification to correct this condition has been implemented and successfully tested.

As discussed with the NRC in Walnut Creek on October 10, 1989, a formal Unit 3 Restart Oversight Program was implemented under the direction of the Management Review Committee. The Committee has evaluated the actions taken in accordance with the Restart Program, concluded that Unit 3 is ready for restart and so advised me. I have reviewed the status of preparations to restart Unit 3 and have so determined that Unit 3 is ready for restart.

This letter, together with APS's presentations to you and your staff, stand as APS's certification of compliance with your confirmatory action letter of June 28, 1989.

Very truly yours, WFC/TDS/JJN/kj Attachment CC: A. E. Chaffee T. J. Polich M. J. Davis S. A. Richards T. L. Chan A. C. Gehr R. P. Zimmerman

I I

STATE OF ARIZONA )

) vs COUNTY OF MARICOPA )

I, William F. Conway, represent that I am Executive Vice President - Nuclear, that the foregoing document has been signed by me on behalf of Arizona Public Service Company with full authority to do so, that I have read such document and know its contents, and that to the best of my knowledge and belief, the statements made therein are true.

William F. Conway Sworn to before me this ~~~r+ day of 1989 8.

Notary Public My Commission Expires:

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