ML20006D520
| ML20006D520 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 01/29/1990 |
| From: | Joyce T COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| OSR-007-90, OSR-7-90, NUDOCS 9002130398 | |
| Download: ML20006D520 (4) | |
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ion. Illinois 60099
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January 29, 1990
_gc U.'S. Nuclear Regulatory Commission
. Document Control Desk
' Washington, DC 20555
Dear. Sir:
The enclosed Special Report number OSR/007/90, Docket No. 50-2PS/DPR-39 from Zion Generating Station !s being transmitted to you in accordance with the requirements of. Technical Specification 3.21.2.0.
Very truly yours, L
T. P. Joyce
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Station Manager Zion Generating Station TJP/rmd
Enclosure:
Special Report cc: NRC Region III. Administrator NRC Resident' Inspector INP0 Record Center CECO Distribution List t
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9002130398 900129
.PDR ADOCK 05000295
'o PDC JAN 3 01990
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i January 25, 1990 OSR/007/90 t
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T. P. Joyce'
Subject:
On-Site Review of.0B Diesel Fire Pump Inoperable Greater Than Seven r
Days.
.On-Site review has investigated the inoperability of the OB' Diesel Fire Pump.
This report was prepared accordihg to the requirements of Technical Specification 3.21.2.B.
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On-Site Review has determined the following:
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On December 28,-1989 at approximately 1800 hours0.0208 days <br />0.5 hours <br />0.00298 weeks <br />6.849e-4 months <br />, OB Diesel Fire Pump was ifound-to have fuel oil-in the lube oil system after performance of routine periodic testing.(PT-201). -This failure is presently under investigation (DVR 22-1-89-183) and is believed to be caused by wear between the injector body and plunger assemblies.
This diesel is tested weekly and has been started more than 1500+ times-since it was installed.
Repairs were begun the following morning under Work Request Z-88852. Due ito the extended. Unit 1 outage and availability of service representatives, the repairs were carried out on day shift only.
Work is currently underway and is not complete beca'use of the availability of parts for this-model year and type of. engine.
(See Attachment A)
During the time 08 diesel fire pump was inoperable, two service water
. booster pumps (each rated at 4000 gpm capacity) were operable to provide water
.to the site main ring header. 0A fire pump, normally available for service, was undergoing modification testing to prove operability of a new NFPA 1
mandated controller. While testing was underway, pump problems developed
. causing overheating and high amperage readings.
This problem was investigated and the decision was made to remove 0A Fire Pump and rebuild it on site.
Repairs are underway and are pending on parts needed to complete the total overhaul.
In the event that neither service water booster pump nor the OA motor l
-driven fire pump are available, the fire header will be fed from the service water pumps through a bypass around the service water booster pumps.
-Normally, pressure from the service water booster pumps holds check valve OSW-0008 in the bypass line closed.
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January 25, 1990 OSR/007/90 ATTACHMENT A QB_Elte__P_ilmp_1titus and Action Plan l
As of January 25, 1990 OB Fire Pump repairs were delayed due to procurement difficulties regarding piston ring sets for three piston / liner replacements..These piston ring sets were shipped late on 1/25/90 and will be on site 1/29/90..The remaining plans to return OB Fire Pump to service are as follows:
1.
Receive new ring sets into stores and. issue to Mechanical Maintenance t
Dept.
1/29/90 2.
Complete remaining engine assembly.
1/30/90 - 1/31/90 3.
perform low speed run-in, simuiated overspeed test (with 2:1 reducer) and other minor engine adjustments as required by Cummins Factory Representative.
2/1/90 - 2/2/90 4.
Reconnect engine controls, return to service and turn over to Operating Dept, for performance of PT 201, 2/2/90 5.
Declare OB Diesel Fire Pump operable.
2/3/90 Notification will be made to the Senior Resident' Inspector if any further delays will be incurred.
Submitted by:
Charles E. Prymula Tech Staff Aux Systems Group Leader l
L 18130 l
tui OSR/007/90 y,
l-Based on the above considerations, On-Site Review has determined that the backup systems are adequate to provide for loss of OB diesel fire pump in conjunction with OA motor driven fire pump and no special procedures or additional equipment are required.
Preparedby:[/'4dr[PAvm[A Disciplines required: Jk.B. G C. E. Prym61a Station Review:
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f6ff supervisor //
'O rating Engineer Asst. Superintendent
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N080 I concur and approve:
T. P. Joyce Station Manager Zion Station TPJ/CEP/rmd cc: R. N. Cascarano H. Stone /PNSRC A. J. Ockert H. R. Kurth/ Operating Engineers C. E. Prymula T. J. Malman-R. J. Squires T. E. Hatts
- u. E. Trzyna G. J. Plimi Reg. Assurance File b
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