ML17223B057

Special Rept:On 901130,loose Parts Monitor Declared Out of Svc for More than 30 Days.Caused by Presence of Large Hz Signal.Troubleshooting Efforts Will Resume on Inaccessible Areas of Sys During Next Available Opportinity

ML17223B057
Person / Time
Site:	Saint Lucie
Issue date:	01/07/1991
From:	Sager D FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-91-13, NUDOCS 9101140102
Download: ML17223B057 (5)

Text

ACCELERATED DISTRIBUTION DEMONSTRATION SYSTEM RECIPIENT ID CODE/NAME PD2-2 LA NORRXS,J XNTERNAL: ACNW AEOD/DOA AEOD/ROAB/DSP NRR/DET/EMEB 7E NRR/DLPQ/LPEB10 NRR/DREP/PRPBll NRR/DST/SICB 7E NRR/DST/SRXB 8E RES/DSIR/EIB COPIES LTTR ENCL 1 1 1 1 2 2 1 1 2 2 1 1 1 1 2 2 1 1 1 1 1 1 RECIPIENT ID CODE/NAME PD2-2 PD ACRS AEOD/DS P/TPAB NRR/DET/ECMB 9H NRR/DLPQ/LHFB1 1 NRR/DOEA/OEAB NRR/DST/SELB 8D COPIES LTTR ENCL 1 1.2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1-1 REGULATORY INFORMATION DISTRIBUTION SYSTEM (RXDS)ACCESSION NBR:9101140102 DOC.DATE: 91/01/07 NOTARIZED:

NO FACIL:50-389 St.Lucie Plant, Unit'2, Florida Power&Light Co.AUTH.NAME AUTHOR AFFILIATION SAGER,D.A.

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

SUBJECT:

Special rept:on 901130,loose parts monitor.declared out of svc for greater than 30 days.Caused by presence.of large HZ signal.Sys undergone complete channel calibr,per Teh spec 4.3.3.8.c during completed refueling outage.DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR ENCL SIZE: TITLE: 50.73/50.9 Licensee Event Report (LER), Incident Rpt, etc.NOTES: DOCKET 05000389 R D/A D s EXTERNAL: EG&G BRYCE,J.H NRC PDR NSIC MURPHY,G.A 3 3 1 1 1 1 L ST LOBBY WARD NSIC MAYS,G NUDOCS FULL TXT 1 1 1 1 1 1 D s NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE!CONTACT THE DOCUMENT CONTROL DESK, ROOihl P 1-37 (EXT.20079)TO ELIMINATE YOUR NAME FROiVI DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!TOTAL NUMBER OF COPIES REQUIRED: LTTR 33 ENCL 33 D D J

P.O.ux 128, Ft.Pierce, FL 34954.0'IZE JAN 7 199!L-91-13 10CFR50.36 U.S Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 Gentlemen:

Re: St.Lucie Unit 2 Docket No.50-389 Special Report Date of Event: November 30, 1990 Loose Parts Detection System Channel Out of Service The attached Special Report is being transmitted pursuant to the requirements of St.Lucie Unit 2 Technical Specification 3.3.3.8 and pursuant to Technical Specification 6.9.2 The report provides notification that a Loose Parts Detection System channel was out of service for greater than thirty (30)days and the plans for restoring the channel to service.Should there be any questions on this information, please contact us.Very truly yours, D.A ager Vice resident St.Lucie Plant DAS:GRM:kw DAS/PSL N323 Attachment cc:.Stewart D.Ebneter, Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, St.Lucie Plant 9'101140102 910107 F'DR ADOCK 05000389 PDR i(]

NRC SPECIAL REPORT ONE CHANNEL OF LOOSE PARTS MONITOR OUT OF SERVICE FOR A PERIOD GREATER THAN ALLOWED BY TECHNICAL SPECIFICATIONS On November 30,1990 Channel 8 of the St.Lucie Unit 2 Loose Parts Monitor (LPM)was declared out of service due to the presence of a large 60 HZ signal.As required by Technical Specification 3.3.3.8 this Special Report is being submitted to notify the NRC that the channel has been out of service greater than 30 days.The cause of this failure has not yet been determined.

because not all areas of the system are accessible during power operations.

All accessible areas of the system have been investigated.

Efforts are continuing to identify the source of the electrical noise, and the mechanism for induction into the Loose Parts Monitoring System.Trouble shooting efforts and input from the vendor point to a failed sensor/cable.

The LPM system had undergone a complete channel calibration per TECH SPEC 4.3.3.8.c during the just completed refueling outage.At the next available opportunity troubleshooting efforts will resume on the areas of the system not accessible while at power.Channel 7 and 8 of the Loose Parts Monitor are located on the 2B Steam Generator, therefore Channel 7 is still available for alarm functions on the 2B steam generator.

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