ML17305A669

Documents Compensatory Actions Operations Personnel Will Perform Prior to Requested Waiver of Compliance on Feedwater Isolation Valves

ML17305A669
Person / Time
Site:	Palo Verde
Issue date:	03/23/1990
From:	Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
161-03008-WFC-J, 161-3008-WFC-J, NUDOCS 9004180362
Download: ML17305A669 (6)

Text

ACCELERATED DL')TEHBUTION DEMONSTRATION SYSTEM I

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(f REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9004180362 DOC.DATE: 90/03/23 NOTARIZED:'NO, DOCKET FACIL: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 MARTIN,J.B.

Region 5, Ofc of the Director

SUBJECT:

Documents compensatory actions operations personnel will perform prior to requested waiver of compliance on FWIV.

DISTRIBUTION CODE IE01D COPIES RECEIVED:LTR ENCL 0 SIZE:

TITLE: General (50 Dkt)-Insp Rept/Notice of Vio ation Response NOTES:Standardized plant.

-05000530 RECIPIENT ID CODE/NAME PD5 PD CHAN,T INTERNAL: ACRS AEOD/DEIIB DEDRO NRR/DLPQ/LPEB10 NRR/DREP/PEPB9 D NRR/DST/DIR SE2 NUDOCS-ABSTRACT OGC/HDS1 RES/DSR/HFB/HFS EXTERNAL: LPDR NSIC NOTES:

COPIES LTTR EN 1

1 2

1 1

1 1

1 1

1 1

CL RECIPIENT ID CODE/NAME PETERSON,S.

AEOD AEOD/TPAD NRR SHANKMAN,S NRR/DOEA DIR 11 NRR/DRIS/DIR NRR/PMAS/ILRB12 0 ~Z.LE 02 RGN5 FILE 01 NRC PDR COPIES LTTR ENCL 1

1 1

1 1

1 1

1 1

NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTEI CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAMEFROM DISIRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEEDl TOTAL NUMBER OF COPIES REQUIRED:

LTTR 26 ENCL

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Arizona Public Service'Cbmpany P.O. BOX 53999

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PHOENIX, ARIZONA85072%999 WILLIAMF. CONWAY EXECUTIVEVICEPRESIDENT NUCLEAR L,c Ar) o7161 $380IISFC/JST i J !'AI> 4 March 23, 1990.

Docket No.

STN 50-530 Mr. John B. Martin Regional Administrator, Region V U. S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, CA 94596-5368 Ref'erence:

Letter from W.

F.

Conway (APS) to J.

B. Martin (NRC Region V) dated March 22, 1990;

Subject:

Waiver of C'ompliance Concerning Feedwater Isolation Valves

Subject:

Palo Verde Nuclear Generating Station Unit 3 Compensatory activities performed during the waiver compliance period requested in above referenced letter File:

90-056-026 r

of This letter documents the compensatory actions Unit 3 operations personnel will perform prior to and during the requested waiver of compliance period on Feedwater Isolation Valves (FWIV) 3JSGBUV0132 and 3JSGBUV0137.

The following measures are being taken to ensure the activity will be performed in the safest possibl~

manner and to minimize potential effects of multiple system failures during the time period one of the FWIVs is inoperable:

1.

Prior to commencing any work a briefing will be held with the operations and maintenance personnel in accordance with plant policy.

2.

The FWIV in series with the FWIV to be removed from service will be surveillance tested immediately prior to commencing work.

3.

The first FWIV removed from service will be surveillance tested following replacement of the four way valve to verify operability prior to proceeding to the second FWIV.

This way no more than one FWIV will be inoperable at any time.

4.

Operations personnel will be instructed to take the following actions in the event a

Main Steam Isolation Signal (MSIS) occurs

. during maintenance on one of the FWIVs and the FWIV in series does not close:

a)

Use the handswitch 'in the control room to close the FWIV in series with the inoperable FWIV.

9004i80362 900323 P13R I-"IDOCK 05000530 p

PDC

Mr. John B. Martin Regional Administrator, Region V U.

S. Nuclear Regulatory Commission Page 2

161-03008-WFC/JST March 23, 1990 b) If the FWIV does not go closed in response to the handswitch, trip both main feedwater pumps and close their discharge valves..

These actions will provide additional assurance of preventing containment overpressurization and excessive reactor cooldown following a main steam line

break, main feedwater line break, or loss of coolant accident during the period of time one of the FWIVs is inoperable.

Additionally, these" actions will prevent equipment damage-in the event a failure of the feedwater control system results in overfeeding a steam generator to the MSIS trip setpoint.

Sincerely, WFC/J ST/j le cc:

T. L. Chan S.

R. Peterson D. H.

Coe A. C. Gehr A. H. Gutterman (all w/attachment)