ML17227A773

Special Rept:On 930307,SG Blowdown Treatment Facility Bldg Exhaust Sys Radiation Monitor Failed Functional Test & Declared Inoperable.Monitor Out of Svc for More than 72 H Due to Repair Problems.Detector Repaired & Placed in Svc

ML17227A773
Person / Time
Site:	Saint Lucie
Issue date:	03/22/1993
From:	Sager D FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-93-073, L-93-73, NUDOCS 9303260164
Download: ML17227A773 (4)

Text

ACCEI ERAT DOCUMENT DISTRI TION SYSTEM REGULATO~INFORMATION DISTRIBUTION TEM (RIDS)

ACCESSION NBR:9303260164 DOC.DATE: 93/03/22 NOTARIZED: NO DOCKET ¹ FACIL:50-335 St. Lucie Plant, Unit 1, Florida Power & Light Co. 05000335 50-389 St. Lucie Plant, Unit 2, Florida Power & Light Co. 05000389 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 930307,SG blowdown treatment facility bldg exhaust sys radiation monitor failed functional test &

declared inoperable. Monitor out of svc for more than 72 h due to repair problems. Detector repaired & placed in svc.

DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR ENCL SIZE:

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

NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD2-2 LA 1 1 PD2-2 PD 1 1 NORRIS,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/DE/EELB 1 1 NRR/DE/EMEB 1 1 NRR/DORS/OEAB 1 1 NRR/DRCH/HHFBHE 1 1 NRR/DRCH/HICB 1 1 NRR/DRCH/HOLB 1 1 NRR/DRIL/RPEB 1 1 NRR/DRSS/PRPB 2 2 NRR JDSSA/SPLB 1 1 NRR/DSSA/SRXB 1 1 EE E 02 1 1 RES/DSIR/EIB 1 1 RGN2 FILE 01 1 1 EXTERNAL EG&G BRYCE g J ~ H 2 2 L ST LOBBY WARD 1 1 NRC PDR 1 1 NSIC MURPHY,G.A 1 1 NSIC POOREgW. 1 1 NUDOCS FULL TXT 1 1 NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT TIIE DOCUME."I'I'ONTROI. D!-'SK, ROOM Pl-37 (EXT. 504-2065) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DONT NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 32 ENCL 32

March 22, 1993 L-93-073 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555 Re: St. Lucie Units 1 and 2 Docket Nos. 50-335 and 50-389 Special Report Date of Event: March 7, 1993 Steam Generator Blowdown Treatment Facilit Buildin Exhaust S stem Radiation Monitor Out of Service The attached Special Report is being submitted pursuant to the requirements of St. Lucie Technical Specification 3.3.3.1. This report provides notification that a Steam Generator Blowdown Treatment Facility Building Exhaust System Radiation Monitor has been out of service for greater than seventy two hours.

Very truly yours, D. A. er Vice P sident St. Lu e Plant DAS/JWH/kw Attachment cc: Stewart D. Ebneter, Regional Administrator, USNRC Region Senior Resident Inspector, USNRC, St. Lucie Plant II DAS/PSL 78883-93 p6OO64 9303260164 930322 PDR ADOCK 05000335 8 PDR an FPL Gcoup company

NRC SPECIAL REPORT Pursuant to Unit 1 and Unit 2 Technical Specification 3.3.3.1, this 14 day Special Report is generated to notify the NRC of an inoperable Steam Generator Blowdown Treatment Facility Building Exhaust System Radiation monitor.

On March 7, 1993, a Chemistry Technician performed a monthly functional check of RM-45-1, Steam Generator Blowdown Treatment Facility Building Exhaust System Radiation Monitor. The radiation monitor failed its functional check and was declared inoperable by Operations at 0015.

Instrumentation and Controls personnel immediately began troubleshooting Radiation Monitor 45-1 and discovered that its scintillation detector had failed. A new detector was installed, but efforts to restore the monitor were delayed by the discovery of damaged coaxial cables for a power supply and input signal line.

Action Statement 15 of Tech Spec 3.3.3.1 requires the monitor to be restored to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, or that a preplanned alternate method of sampling be initiated and a Special Report be submitted. Since the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> requirement was nearing completion, a portable radiation monitor was installed as an alternate method of sampling. This portable monitor was mounted on a movable skid and had the same function as the existing monitor. The process lines and alarm functions were rerouted to the portable monitor and this monitor was subsequently declared operable at 1600 on March 9, 1993. Technical Specification 3.3.3.10 allows this effluent pathway to remain in service for up to 30 days when monitored by alternate sampling equipment.

On 12 March, 1993, Instrumentation & Controls personnel completed repairs on the detector. These repairs included replacement of the scintillation detector and the two degraded coaxial cables. The detector's performance was monitored for several days, and the detector was placed back in service on 15 March, 1993. The alternate sampling equipment was then removed.