ML17227A688

Special Rept:On 921208,channel 7 of Loose Parts Monitoring Sys Declared Out of Svc Due to Excessive Electrical Noise Received at Preamplifier for More than 30 Days.Complete Channel Calibr Performed.Channel 8 Still Available

ML17227A688
Person / Time
Site:	Saint Lucie
Issue date:	01/14/1993
From:	Sager D FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-93-013, L-93-13, NUDOCS 9301220230
Download: ML17227A688 (3)

Text

4 ACCELERATED DOCUMENT DIS'1BUTION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9301220230 DOC.DATE: 93/01/14 NOTARIZED: NO DOCKET FACIAL:50-389 St. Lucie Plant, Unit 2, Florida Power & Light Co. 05000389 AU'ZH.NAME AUTHOR AFFILXATION SAGERiD.A. Florida Power & Light Co.

RECIP.NAME RECIPIENT AFFILIATION.

Document Control Branch (Document .Control Desk)

SUBJECT:

Special rept:on'21208,channel 7 of loose parts monitoring sys declared out of svc due to excessive electrical noise received at preamplifier for more than 30 days. Complete channel calibr performed. Channel 8 still available.

DISTRIBUTION CODE: ZE22D COPIES RECEIVED:LTR t ENCL C, SIZE:

TITLE: 50.73/50.9 Licensee Event Report (LER), Incident Rpt,'-etc.

NOTES:

RECIPIENT COPIES RECXPIENT COPIES ID CODE/NAME'D2-2 LTTR ENCL ID CODE/NAME LTTR ENCL LA 1 1 PD2-2 PD 1 1 NORRIS P J 1 1 INTERNAL: ACNW 2 2 ACRS 2 =

2 AEOD/DOA 1 1 AEOD/DSP/TPAB 1 1 AEOD/ROAB/DSP 2 2 NRR/DET/EMEB 7E 1 . 1 NRR/DLPQ/LHFB10 1 1, NRR/DLPQ/LPEB10 1 ~ 1 NRR/DOEA/OEAB 1 1 NRR/DREP/PRPB11 2 2 NRR/DST/SELB SD 1 NRR/DST/SXCB8H3 1 RR/RDBg/SPLB8Dl 2 1 1 NRR/DST/SRXB 8E 1 1 EG ~LE 02 1 1 RES/DSIR/EIB 1 1' FILE 01 'GN2 1 1 EXTERNAL 'G &G NRC PDR BRYCE P J ~ H 2 2 L ST LOBBY WARD NSIC MURPHY,G.A 1

1 1 1 1 NSIC POOREPW 1 1 NUDOCS FULL TXT 1 1 NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM PI-37 (EXT. 504-2065) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DONT, NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 31 ENCL '1

P.O. Box 128, Ft. Pierce, FL 34954-0128 January 14, 1993 FPL L-93;013 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555 Re: St. Lucie Unit 2 Docket No. 50-389 Special Report Date of Event: December 8, 1992 Loose Parts Monitor Channel Out of Service The attached Special Report is being submitted pursuant to the requirements of St. Lucie Technical Specification 3.3.3.8. This report provides notification that a Loose Parts Monitoring channel has been out of service for greater than thirty days and describes the plans for restoring the channel to service.

Very truly yours, 8'

" F D. ager Vice President St. Lucie Plant DAS/JWH/kw Attachment cc: Stewart D. Ebneter, Regional Administrator, USNRC Region II Senior Resident Inspector, USNRC, St. Lucie Plant DAS/PSL 4844-93 ZlP $

O,"'301220230 930114 PDR S

ADOCK 05000389 PDR an FPL Group company

~i>>

NRC SPECIAL REPORT

-On December'8, 1992 Channel 7 of the St. Lucie Unit 2 Loose Parts. Monitor (LPM) was declared out of service due to excessive electrical noise being received at the preamplifier . As required by Technical Specification (TS) 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. The LPM system had undergone a complete channel calibration per TS 4.3.3.8.c 'during, the 1992 refueling outage. At the next available opportunity troubleshooting efforts willresume on the areas of the system not accessible while at power.

1 Channel 7 and 8 of the Loose Parts Monitor are located on the 2B Steam Generator, therefore Channel 8 is still available for alaim functions on the 2B steam generator.