ML20080M706
| ML20080M706 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 02/09/1984 |
| From: | Schroeder C COMMONWEALTH EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20080M708 | List: |
| References | |
| 8119N, NUDOCS 8402210251 | |
| Download: ML20080M706 (29) | |
Text
_ _ _
Commonwealth Edison
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' / ona First N:tional Plaza Chicago. lilino.s 7 Address Reply to: Post Othee Box 767 Chicago, Illinois 60690 February 9, 1984 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. N; clear Regulatory Commission Washington, DC 20555
Subject:
LaSalle County Station Units 1 and 2 Deviation Report History for LaSalle Ccunty Station's Diesel Fire Pumps from April 17, 1982 to January 1,1984 NRC Docket Nos. 5D-373 and 50-374 References (a):
C. W. Schroeder letter to H. R. Denton dated November 23, 1983, subject LaSalle County Station, Unit 2, Fire Protection (b): LaSalle County Station, Unit 2 Facility Operating License, NPF-10 License Condition 2.C.(15).(f)
Dear Mr. Denton:
The Deviation Report History for LaSalle County Station Diesel Fire Pumps from April 17, 1982 to January 1,1984 is being submitted to your office in accordance with Commonwealth Edison's commitment in reference (1). This report meets the requirements of reference (2) and it is requested that thit 2 license condition 2.C.(15).(f) be closed.
The attached Diesel Fire Pump Report was extracted from the Deviation Report file that is maintained on site in accordance with the Commonwealth Edison Quality Assurance program. The enclosed index and attachments indicate that this History Report is listed in three different methods. The Deviation Report History Subject mentioned in the index and throughout this report refers to certain types of failure. If the fuel filters clogged and a Deviation Report was written, the Deviation Report History Subject would be categorized as " clogged fuel filters". Attachment D provides a listing and copies of Special Reports submitted to the Regional Administrator when both Diesel Fire Pumps were declared inoperable at the same time.
During the last failure of the A Diesel Fire Pump in December, 1983, questions were raised by NRR on the operability of the Diesel Fire Pumps discharge check valves. The failure has been attributed to a large foreign object lodged in the check valve and both Discharge Check Valves have been functionally tested satisfactorily.
8402210251 840209 Of PDR ADOCK 05000373 S
PDR 0
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. c. :, o; H. R. Denton February 9, 1984 It-should be noted that Commonwealth Edison believes that the availability of the subject pumps will be improved significantly as the number of starts are decreased. Administrative actions have been taken to reduce the number of starts and design changes are under review to improve the fire jockey pump system.
To the best of my knowledge and belief the statements contained herein and in the attachments are true and correct. In some respects these statements are not based on my personal knowledge but upon information furnished by other Commonwealth Edison and contractor employees. Such information has been reviewed in accordance with Company practice.and I believe it to be reliable.
Enclosed for your use are one signed original and forty (40) copies of this letter and the attachment. If there are any further questions in this matter, please contact this office.
Very truly yours, 2/4/84 C. W. Schroeder Nuclear Licensing Administrator CWS/lm t
cc:
J. G. Keppler A. Bournia - Federal Express NRC Resident Inspector - LSCS
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INDEX ATTACHMENT A:
Alphabetical List of Deviation Abport History Subject and whether an engine failed or more than one DVR was written per subject.
- ATTACHMENT B:
-Alphabetical List of Deviation Abport Subjects and each subject report describes what has been done to date to prevent this problem froc. happening in the future.
ATTACHMENT C:
Chronological List of Diesel Fire Pump Deviation Abports from April 17, 1982 to January 1,1984.
ATTAC M T;D:
Special % ports submitted to N30 %gional Administrator under Technical Specification 3.7.5.1.b.2.
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ATTACHW.NT A DEVIATION EPORT SUBJECT Battery Cable Check Valve (Fire Pump Discharge)
Engine Failed Cooling Water Lines
. Cooling water solenoid Day Tank Fuel Leak Fuel Filter Fuel Line Leak Fuel Pump Input Shaft Broken Glycol in Oil Engine Failed Jacket Water Level Low Maintenance Minimum Flow Line, Jockey Fire Pump 011 Level Low Oil Pressure Switch Stuck 011. Dipstick
%diator Cap
%w Water %ducer Speed Cable Temperature Gauge U-Joint Engine Failed V-Belt Engine Failed l
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- means more than one DVR was written for this subject.
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ATTACHENT B This Section addresses each Deviation Report subject and describes what has been done to date to prevent this problem from happening in the future.
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DEVIATION EPORT SUBJECT Battery Cable DVR #
DATE OF.0CCURENCE EQUIPMENT INVOLVED 1-1-82-378 12/27/82 OA DFP STATUS TO DATE:
Battery cable was replaced and we have had no further problems with
. battery cables. The Diesel Fire Pump batteries have been mounted off the floor on battery stands to simplify and insure proper maintenance. The
-battery cables from the batteries to the engine have been routed via conduit so as to protect the battery cables from damage.
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DEVIATION 8EPORT SUBJECT Check' Valve (Fire Pump Discharge)
DVR (
DATE OF OCCUR 8ENCE EQUIPENT INVOLVED l-1-83-479 12/27/83 "A" DFP r
. STATUS TO DATE:
' A. block of wood was found in OA DFP discharge check valve.
The block of
. wood caused the discharge check valve to stick open and the pump and diesel rotated backward. The wood was removed and the diesel en i l
. The fire pump and check valve were tested satisfactorily.g ne was rep aced.
'To prevent this happening in the future the fire protection strainers are to be checked regularly for debris.
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DEVIATION EPORT SUBJECT Cooling Water Lines DiR #
DATE OF OCCURENCE EQUIPMENT INVOLVED l-1-83-188 5/17/83 OA DFP
-J1-1-83-194 5/25/83 OA DFP l-1-83-353 8/27/83 OA DFP STATUS TO DATE:
- The above problem was due mainly to hard piped lines connected to the angle drive and the hard piped lines vibrating and starting to leak.
The above problem has been addressed on OA and OB DFP by bracing the lines
~ that vibrate and using stainless steel. covered flexible hose to join the cooling water pipes to the angle drive. This problem has not reoccured since installation of the flexiale hoses.
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U DEVIATION EPORT SUBJECT Couling Water Solenoid
. DVR #
DATE OF OCCURENCE EQUIPMENT INVOLVED
.1-1-82-107 6/23/82 OB DFP
-STATUS TO DATE:
08 DFP. overheated because the cooling water solenoid failed to open.
'This problem was' solved by removing the cooling water solenoids from both
'DFP's.
NFPA'20 states an electric solenoid cooling water valve is not Jrequired on a vertical shaft turbine type pump when there is no pressure in the discharge when the punp is idle.
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- DEVIATION 8EPORT SUBJECT Day Tank Fuel Leak DVR #
DATE.0F OCCURT_NCE -
EQJIPENT INVOLVED l-1-82-201 8/22/82 OB DFP
--l-1-82-208 8/28/82 08 DFP STATJS TO DATE:
- The Diesel Fire Pump Day Tank was reinforced in the area of fuel supply line and this problem has never occurred since.
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DEVIATION EPORT SUEGECT Fuel Filter
' DVR #
DATE OF OCCURENCE EQUIPMENT INVOLVED
- 1-1-82-99 6/18/82 OA DFP 1-82-273 10/10/82 =
OA DFP STATUS'TO DATE:
The fuel filters were becoming clogged and starving the engine of fuel.
This was due to construction work being done on Diesel Oil Lines and causing
. debris to enter the Diesel Fuel Oil System. This problem has not occurred since 10/10/82.
A modification is being considered to add a duplex strainer upstream of both DFP Day Tanks to prevent debris from entering Day Tanks. This problem has not reoccurred since the last occurrence.
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- 4 DEVIATION EPORT SUa]ECT Fuel Line Leak DVR # '
DATE OF OCCURENCE EQUIPMENT INVOLVED l-1-82-62 5/26/82 OA DFP 1-1-82-124_
7/6/82 OB DFP STATUS TO baim.
The Fuel Line connections from the Day Tank to the engine Fuel Pump leaked fuel. Stainless Steel jacketed flexible hose was used to connect the fuel
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line to the diesel engine fuel pump and the Day Tank. This problem has not happened since 7/6/82.
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DEVIATION EPORT SUBJECT
,,.or Fuel Pump Input Shaft Broken DVR # '
DATE OF OCCURTNCE EQUIPMENT INVOLVED l-1-82-130 7/14/82 OB DFP STATUS TO DATE:
' The fuel pump input shaft was replaced and has caused no problems since.
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' DEVIATION EPORT SUBJECT Glycol in Oil DVR #
DATE OF OCCURENCE EQUIPENT INVOLVED l-1-83-144 4/24/83 OA DFP STATUS TO DATE:-
It was not ' determined how Glycol entered the diesel enpine oil system.
The diesel engine was replaced and this problem has not happened since this
-failure.
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DEVIATION EPORf SUEDECT Jacket Water Level Low DVR #
DATE OF OCCURENCE EQUIPMENT INVOLVED l-1-83-313 8/9/83 OB DFP STATUS TO DATE:
-It has not been determined why the diesel engine jacket water level was low.. Coolant mixture was added to OB DFP and this problem has not happened since.
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- DEVIATION SEPORT SUBJECT
.3 Maintenance
.' DVR #
DATE OF: OCCUR 8ENCE EQUIPMENT INVOLVED'
'l-1-83-473
'12/6/83 OB DFP STATUS TO DATE:
OB 0FP was out' of' service only to replace the engine because of good
.' maintenance practices and not because of a failure on OB DFP.
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A DEVIATION EPORT SUBJECT Minimum Flow Line, Jockey Fire Pump 3--
. DVR # -
DATE OF OCCURAENCE Qf l1-1-83-331 8/18/83 ~
EQUIPENT INVOLVED "B" Jockey Fire Pump
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- -STATUS TO DATE:
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.This line was _ repaired and has not leaked.since the original failure.
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DEVIATION SEP05U SUBJECT Engine Oil Level Low DVR #
DATE OF OCCUR 5ENCE
- EQUIPENT INVOLVED l-1-82-256-10/3/82 OA DFP STATUS TO DATE:
- The diesel engine would not reach rated SPM because the engine oil level
'was low. 011 was added to the engine crank case and the engine tested satisfactorily. AIR l-82-543 was written to ensure that proper Diesel Fire Pump starting / running will be trained on by operating.
In particular, the proper way to check engine oil.
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4 DEVIATION EPORT SUBJECT 011 Pressure Switch Stuck
. DVR # -
DATE OF OCCURTNCE EQUIPMENT INVOLVED 1-1-82-251-9/29/82 OB DFP
-STATUS TO DATE:
08 DFP failed to start in the Manual or Test Mode. No problems were found so the 08 DFP was retested and operated satisfactorily.
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[I DEVIATION EPORT SUBJECT 011 Dipstick DVR #
DATE OF OCCURENCE.
EQUIPMENT INVOLVED 1-1-82-38 5/12/82 OA DFP STATUS TO DATE:
An_ operator while checking engine oil with the engir.J dipstick, shorted between the engine block and the positive terminal of the starter solenoid.
- To prevent happening in the future, the starter connections at the diesel have been insulated with electrical tape. This problem has not reoccurred since this. failure.
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CEVIATION EPORT SUBJECT
%diator Cap DVR #
DATE OF OCCURENCE EQUIPENT INVOLVED 1-1-82-117 7/8/82 OA DFP STATUS TO DATE:
4 OA DFP overheated as the result of a leaking radiator cap. The radiator cap was replaced _and the engine was retested satisfactorily. A step has been
- added to weekly procedure LOS-FP-W2 to inspect the radiator cap for possible damage..
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DEVIATION SEPORT SUBJECT Shw Water Fbducer DVR #
DATE OF OCCUR 8ENCE EQU1PMENT INVOLVED l-1-83-402 10/4/83 OB DFP STATUS'TO DATE:
The Raw Water Reducer is not able to supply enough water to cool the diesel' engine jacket water heat exchanger when the angle drive raw water cooling supply is opened fully. Die temporary fix is to install caution tags on the raw water bypass valve around the Raw water reducer to ensure enough water is available to cool both the angle drive and engine jacket water heat
'cxchange~ adequately.
. Both fire pumps have been tested at full load with this temporary fix and the jacket water-temperatures did not exceed the normal operating temperatures. A permanent fix to this problem is now under investigation.
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J DEVIATION EPORT SUBJECT Speed Cable
. DATE OF OCCORTNCE _
EQUIPENT INVOLVED DVP.9-1-1-82-12 4/17/82.
OB DFP JSTATUS TO DATE:
The speed cable was replaced and the 08 DFP tested SAT. This probler ias
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DEVIATION EPORT SUBJECT Temperature gauge DVR # :
DATE OF OCCURENCE EQUIPMENT INVOLVED-1-1-82-379' 12/18/82 08 DFP ST4TUS TO DATE:
The' operator stated the Diesel Fire Pump Temperature was excessive. After testing the 08 DFP it did not over heat and was declared operable. A work request was written to investigate the possibility of a defective temperature gauge. This problem has not happened.since this incident.
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DEVIATION EPORT SUBJECT U-Joint DVR #
DATE OF OCCURTNCE EQUIPMENT INVOLVED
'1-1-83-390
'9/22/83 OA DFP STATUS TO DATE:
The Universal Joint on OA DFP broke and damaged the diesel engine and angle. drive. Both the diesel engine and angle drive were repaired and returned to service. It was believed this failure was caused by lack of lubrication of the universal joint. - A surveillance has been initiated that
. lubricates the universal joints regularly.
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DEVIATION SEPORT SUa]ECT V-belt 4
DVR # ~
DATE OF OCCUR 5ENCE EQUIPMENT INVOLVED l-1-83-229 6/19/83 OA DFP
- STATUS TO CATE:
The V-belt' guard was crac.ked and caused the water pump V-belt to break.
= The broken VAelt caused the engine to overheat and the engine was damaged because of the lack of Acoling water flow.
The engine was replaced and tested satisfactorily. An addition to LOS-FP-W2 has been added to inspect the V-belt and V-belt guard for cracks at least once a week. This problem has never reoccurred.
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v ATTACl+ENT C Chronological list of Diesel Fire Pump Deviation % ports from April 17, 1982,- to January 1,1984..
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.t ATTACHENT C Deviation
' % port #
'Oate Subject Downtime Pump Involved
'l-1-82-17 4/17/82-. Speed Cable 3 days B
21-1-82-38 5/12/82 011 Dipstick 1 days A
1-1-82-62
-5/26/82-Fuel Line Leak 1 day A 1-82-99 6/18/82. Fuel Filter 1 day A
.1-1-82-107 6/23/82 Cooling Water Solenoid 1 day B
1-1-82-124-7/06/82 Fuel Line Leak' 7 days B
'l-1-82-117 7/08/82
%diator Cap 6 days A
1-1-82-130 ^7/14/82 Fuel Pump Input Shaft Broken 2 days B
1-1-82-201 8/22/82 Day Tank Fuel Leak 2 days B
l-1-82-208' =8/28/82 Day Tank Fuel Leak 4 days '
B
'l-1-82-251 9/29/82 011 Pressure Switch Stuck 2 days B
l-1-82-256 10/03/82 Engine Oil Level Lcw 2 days A
1-1-82-273 10/10/82 Fuel Filter 1 day A
1-1-82-379 12/18/82 Temperature Gauge 7 days B
l-1-82-378. 12/27/82 Battery Cable-4 days A
'l-1-83-144 4/19/83 Glycol in Oil 21 days A
1-1-83-188 5/17/83 Cooling Water Lines 2 days A
1-1-83-194 5/25/83 Cooling Water Lines 7 days A
1-1-83-229 6/19/83 V-Belt 10 days A
1-1-83-313 8/09/83.
Jacket Whter Level Low 1 day B
.1-1-83-331
-8/18/83. Minimum Flow Line, Jockey 1 day A&B Fire Pump 1-1-83-353 8/27/83
. Cooling Water Linas 1 day A
1-1-83-390 9/22/83-U-Joint 44 days A
1-1-83-402 10/02/83
%w Water %ducer 1 day B
'l-1-83-473 12/06/83 Maintenance 7 days B
1-1-83-479 12/27/83. Check Valve 16 days A
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ATTAC M T D Special Reports submitted to NRC Regional Administrator under Technical Specification 3.7.5.1.b.2..
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