ML17348A334

Special Rept:On 900527,discovered That Both nonsafety-related Standby Feedwater Pumps Unavailable. Condition Discovered While Aligning Pumps to Steam Generators.Cause Unknown.Replacement Bushing Mfg Onsite

ML17348A334
Person / Time
Site:	Turkey Point
Issue date:	06/19/1990
From:	HARRIS K N FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-90-206, NUDOCS 9006280059
Download: ML17348A334 (5)

Text

ACCELERATED DILUTION DEMONS'TION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)ACCESSION NBR: 9006280059 DOC.DATE: 90/06/19 NOTARIZED:

NO DOCKET FACIL:50-250 Turkey Point Plant, Unit 3, Florida Power and Light C 05000250 AUTH.NAME AUTHOR AFFILIATION HARRIS,K.N.

Florida Power&Light Co.RECIP.NAME RECIPIENT, AFFILIATION Document Control Branch (Document'ontrol Desk)

SUBJECT:

Special rept:on 900527,both standby feedwater pumps unavailable.

DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR 0 ENCL g SIZE: TITLE: 50.73/50.9 Licensee Event Report (LER), Incident Rpt, etc.NOTES RECIPIENT ID CODE/NAME PD2-2 LA EDISON,G INTERNAL: ACNW AEOD/DS P/TPAB DEDRO NRR/DET/EMEB9H3 NRR/DLPQ/LPEB10

'NRR/DREP/PRPB11 NRR/DST/SICB 7E NRR/DST/SRXB SE RES/DSIR/EIB EXTERNAL EG&G STUART g V A LPDR NSIC MAYS,G NUDOCS FULL TXT COPIES LTTR ENCL 1 1 1 1 2 2 1 1 1 1 1'1 1 2 2 1 1 1 1 1 1 4 4 1 1 1 1 1 1 RECIPIENT ID CODE/NAME PD2-2 PD AEOD/DOA AEOD/ROAB/DSP NRR/DET/ECMB 9H NRR/DLPQ/LHFBll NRR/DOEA/OEAB11 NRR/DST/SELB SD N~~BSDl G FI 02 R FILE 01 L ST LOBBY WARD NRC PDR NSIC MURPHY,G.A'OPIES LTTR ENCL 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE~VASTE!CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT.20079)TO ELIMINATE YOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!TOTAL NUMBER OF COPIES REQUIRED: LTTR 34 ENCL 34.y

P.O.Box 14000, Juno Beach, FL 33408-0420 JUN)S$80 L-90-206 U.S.Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C.20555 Gentlemen:

Re,: Turkey Point Unit 3 Docket No.50-250 Unit 3 Standby Feedwater Pumps Unavailability S ecial Re ort Technical S ecification 3.20.1 Action 2.b On May 27, 1990, at 1300 EDT, Florida Power&Light discovered that both non-safety related standby feedwater pumps were unavailable for Turkey Point, Unit 3.In accordance with the requirements of Technical Specification (TS)3.20.1, Standby Feedwater System" and TS 6.9.3.j., a description of the cause of the unavailability and corrective actions taken to restore the system to operability is enclosed.Should you have any questions please contact us.Very truly yours, K.NX, Vice Ci>l arris esident Turkey Point Plant-Nuclear KNH/DRP/DPS/dps attachment cc: Stewart D.Ebneter, Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, Turkey Point Plant ATTACHMENT 1 Event

Description:

On May 27, 1990, at 1300 EDT, with Unit 3 in Mode 2 (Start-up)

'at zero power, Florida Power&Light discovered that both standby feedwater pumps were unavailable for Turkey Point Unit 3.This condition was discovered while aligning the standby feedwater pumps to supply feedwater to the steam generators.

Valve DWDS-3-012 (a non-safety related commercial grade valve)could not be opened due to a stem bushing failure.Since this valve is in the common discharge header for the standby.feedwater pumps, both pumps were unavailable on Unit 3.The standby feedwater pumps were to be used while 3A steam generator feedwater pump (SGFP)was out of service for maintenance.

Cause: Mechanical failure of a valve stem bushing on valve DWDS-3-012 (a non-safety related commercial grade valve)made the valve handwheel inoperable.

Although no specific cause has been determined for the bushing failure, the failure is believed to have been caused by an over-stress condition on the bushing.No previous failures of this bushing were noted.Corrective Actions: Immediate attempts were made to locate a replacement for the failed bushing.When a replacement could not readily be obtained, a replacement bushing was manufactured on-site.After being approved as acceptable by engineering, the replacement bushing was installed.

Valve DWDS-3-012 was successfully test operated and on May 31, 1990, at 1930 EDT, it was declared operable.'