ML17342B188
| ML17342B188 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 02/16/1988 |
| From: | Woody C FLORIDA POWER & LIGHT CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| L-88-77, NUDOCS 8802230028 | |
| Download: ML17342B188 (5) | |
Text
REGULATORY INFORMATION DISTRIBUTlON SYSTEM (RIDB)
ACCESSION NBR: 8802230028 DOC. DATE: 88/02/16 NOTARIZED:
NQ FACIL: 50-250 Turkey Point Planti Unit 3i Florida Power and Light C
50-251 Turkey Point Planti Unit 4i Florida Power and Light C
AUTH. NAME AUTHOR AFFILIATION WOODY'. O.
Florida Power
- 8. Light Co.
REC IP. NAME REC IP IENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Special rept: on 871218. standby feedwater pump (SPF) failed to start. Caused bg failure of SFP motor due to Failed differential pressure sensor. Motor repaired 5 replaced.
New flow indicatoT (FI-6657A) installed.
DOCKET 05000250 05000251 DISTRIBUTION CODE:
IE22D COPIES RECEIVED: LTR ENCL SIZE:
TITLE: 50. 73 Licensee Event Report (LER) i Incident Rpti etc.
NOTES:
REC IP IENT ID CODE/NAME PD2-2 LA ED ISONi G INTERNAL:
ACRS MICHELSON
- EOD/DOA AEQD/DSP/ROAB ARM/DCTB/D*B NRR/DEST/ADS NRR/DEST/ELB NRR/DEBT/MEB NRR/DEST/PBB NRR/DEST/BGB NRR/DLPG/G*B NRR/DREP/RAB N.
D S/SIB RE~-
02 RES/DE/EIB RGN2 FILE 01 EXTERNAL:
EGK.G GRQHi M H ST LOBBY WARD NRC PDR NSIC MAYS> G COPIES LTTR ENCL 1
1 1
1 1
1 2
2 1
1 0
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
5 5
1 1
1 1
1 1
RECIPIENT ID CODE/N*ME PD2-2 PD ACRS MOELLER AEOD/DSP/NAS AEOD/DSP/TP*B DEDRO NRR/DEBT/CEB NRR/DEST/ICSB NRR/DEBT/MT13 NRR/DEBT/RBl3 NRR/DLPG/HFB NRR/DOEA/EAB NRR/DREP/RPB NRR/PMAS/ILRB RES TELFORD> J RES/DRPS DIR FORD BLDG HOYi A LPDR NSIC HARRISi J COPIES LTTR ENCL 1
1 2
2 1
1 1
1 1
1 1
1 1
1 1
1 1
1, 1
1 1
1 1
1 1
1 1
TOT*L NUMBER OF COPIES REQUIRED:
LTTR 46
.ENCL 45
P.O.
14000, JUNO BEACH, FL 334080420 FEBRUARY 1 6 1983 L-88-77 U. S. Nuclear Regulatory Commission Attn:
Document Control Desk Washington, D.
CD 20555 Gentlemen:
Re:
Turkey Point Units 3 and 4
Docket Nos.
50-250 and 50-251 Special Report Standby Feedwater Pump Out of Service in Excess of 30 Da s In accordance with Technical Specification 6.9.3.j.
the attached Special Report is provided for your information.
Should there be any questions on this information, please contact us.
Very truly yours, CD 0 ~
W y
Execu e Vice President COW/SDF/gp Attachment cc:
Dr. J. Nelson Grace, Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, Turkey Point Plant 8802230028 8802i6 PDR ADDCH 05000250 8
SDF/022.SR an FPL Group company
SPECIAL REPORT Turkey Point Units 3 and 4
February 16, 1988 STANDBY FEEDWATER PUMP OUT OF SERVICE IN EXCESS OF 30 DAYS PURPOSE:
Technical Specification (TS) 3.20 requires the submission of a special report in accordance with TS 6.9.3.) if one Standby Feedwater Pump (SFP) is unavailable in excess of 30 days.
This report is being submitted in compliance with the above TS requirement.
EVENT:
On December 18, 1987, at 2000, an attempt was made to start SFP 3A in order to support the startup of Unit 3.
The pump failed to start, and the 3C Bus Ground/Overvoltage alarm annunciated
~
A Plant Work Order (PWO) to repair the pump was generated, and SFP 3A was declared out of service (OOS) at this time ~
Investigation revealed zero resistance from the motor windings to ground.
The SFP motor was then removed and shipped offsite for repair.
The repaired motor s
installation was completed on January 3,
1988.
The A SFP breaker was then racked in and though technically
- OOS, the pump was capable of performing its design functi,on until the breaker was racked out again on January 15.
Prior to the performance of post-maintenance (PM) testing, it was noticed that Flow Indicator FI-6657A, which measures flow from SFP A, was malfunctioning, and the PM test could not be performed.
Another PWO was generated in order to repair FI-6657A.
A search for parts for the flow indicator was initiated but was unsuccessful, and approximately 7 days later a decision was made to expedite the inst'allation of a new flow indicator per an existing Plant Change/Modification (PCM).
This PCM was approved and the implementing Process Sheet (PS) was in the approval process at that time.
The Plant Nuclear Safety Committee (PNSC) approved the implementing PS on January 18, 1988.
The new installation was completed, PM testing was performed, and SFP A
was placed in service on January 22, 35 days after it was declared OOS.
CAUSE OF THE EVENT:
The cause of the ground was a failure internal to the SFP motor.
The cause of the failure of the original flow indicator was a failed differential pressure sensor.
The reason SFP A was OOS in excess of 30 days was the sum and coincidence of the independent failures of the SFP motor and the flow indicator, along with difficulties in locating suitable spare parts.
CORRECTIVE ACTIONS:
1)
SFP A s rootor was repaired and replaced.
2)
A new flow indicator (FI-6657A) was installed.