ML20129E965
| ML20129E965 | |
| Person / Time | |
|---|---|
| Site: | 05000447 |
| Issue date: | 08/30/1983 |
| From: | Earle R GENERAL ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML20127A304 | List: |
| References | |
| FOIA-84-175, FOIA-84-A-66 NUDOCS 8506060646 | |
| Download: ML20129E965 (14) | |
Text
t GEHiERAL ELECTB10 PROPRIETARY INFORMATION
~
GESSAR II 3 DIESEL GENERATOR COMMON CAUSE FAILURE ASALYSIS August 30, 1983 Prepared by: 3T bWb R.
T.
Earle 1
Verified by:
ed
~
W.
P.
Sullivan 8506060646 841203 PDR FOIA CURRAN 84-A-66 PDR
GENERAL _FI s_c,gl0 PROPR!ETARY INFORMATl0E
-Recort Title f
l --. - -
References 1.
Diesel Generator Reliability at Nuclear Power Plants - Data and Pr eliminary Analysis, EPRI Report No. te-2433. 6/82.
2.
Reliability of Emergency AC Power Systers at Duclear Power Plants, NJREG/CR-29.. ir, CRNL/24-8545. July 1983.
.3.
Handbook of Etrnan Reliability Analysis with E:.phasis on Nuclear Power Plant Applications, NJREG/CR-1278, Swain and Gutt: ann, October 1980.
1
GENERAL ELECTalg PR3?RIETARY IEFDRMhi}Dh CG Data t
f i
1 Abstracts of LERs frcxn the Nuclear Safety Inforination Center (NSIC) computer file.
2.
Daergency compnent cooling system (ECCS) equipnent outage data submitted i
to the lac by licensees in response to a questionaire associated with NUREG-0737.
3.
Diesel generator data suhilitted to the NRC by licensees in respnse to a questionaire prepared as part of the referenced study.
2
LitNhHAL'ELECTR!C l
PROPR!ETARY INFORMAT!w EscriMien of No. 3 Diesel Ganerator Indemndency Tne No. 3 diesel generator for the HPCS system differs frcn the No.1 and No. 2 D/G(s) in that it is specified by General Electric a total gaalified package using equignent and accessories different frca those used for the No.1 and No.2 DGs. 'Ihe equignent for the No. 3 DG system is selected with great care based on the requirements for the HPCS system only.
Tne system does not include Provisions for non-essential equipuent loads or for any bus transfers.
W e HPCS bus is independent of other stancby sources.
n e diesel engines are series 645-E4 units manufactured by General !btors Co. (the No.1 and No. 2 D3s are tycically manuf actured by LN7AL Co.).
Tne use of a diverse D3 for the third division significantly reduces the ptential of connon cause failures resulting frcra manufacturing or design errors.
It also reduces the probability of co m.cn cause maintenance errors since many of the maintenance activities will be unique to the No. 3 diesel only.
Tne HPCS system was designed to be completely independent. The No. 3 IX; has the follcuing dedicated equignent and supprt systers:
battery battery charger air compressor ud start system controls 1 day and 7 day fuel oil tanks 4
LitutHAi. ELECTRIO o
PROPRIETARY IMORMATION air intake rocrn and plenu:n exhaust stack self contained D3 fuel supply system self contained D3 lube oil systen dedicated service water system (frcru Division 1 spray pnd) contained in separate D3 rocm In the EW6 standard plant, the Division 2 and 3 D3 rocms are located adjacent to each other on one side of the reactor building, while the Division 1 D3 room is located on the other side of the reactor building. 2.is se;:aration redaces the pssibility of a 3 D3 ccmnon cause failure.
f Analysis i-G e
W L
t i
l l
I e
5
c.
GENERAL E!.ECTRIO
~
PR3PRIETARY INFORMATi0h APPENDIX A SUl"ARY OF MULTIPLE DIESEL GDL%TR FAILURE EVDTIS WITH ODMMEh"IS EDR GESSAR II SENS3 RING A.
Hardware Common Cause Failure Potential 1.
Beaver Valh.ey LER 479-48 Cause:
Electric fuel ptrnp blocked by desicant bag.
Digine-driven fuel p=p continued to cperate.
Bag found in DG No.1 fuel tank.
i x
Corrment:
.,1
. s' 2.
. Big Rock Point LER 476-8 Cause:
Cooling water shaf t was scored.
Inlet screen was partially plugged.
9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br />.
13
fdtfitMAL tLtUiMlU PROPR!ETARY INFORHil0N Ccanent:
I, I
(
3.
Crystal River 3 Date: 1/4/79 j.
Cause:
.-Roan tenperature was 280?. DGs would not start.,
Ccanent:
4.
Dresden 3 LER 477029 Cause:
Hot envircr;nent caused cooling water ptr::p breaker to trip.
O hours.
Ccmnent:
1 M
14
GEfiERAL ELECTRIC x-PROPRIETARY INFORMAT!DN
/p
~
/
5.
Fort Calhoun LER 979-6 Cause:
Cracked pipe leaked water into the bulk storage. Operator noticed increasing fuel level.
~.
Ccxment:
l
./
- 6. 7. 8. & 9.
Millstone 2 LERs 478-9, 78-33, 76-54, & 76-59 Cause:
Lcw or no cooling water flow due to raussel fouling of the heat exchangers.
4 failures and.47 hours5.439815e-4 days <br />0.0131 hours <br />7.771164e-5 weeks <br />1.78835e-5 months <br />.
Ccment:
t l
J f
15
Liti1 THAL ELECTRIC PROPRIETARY INFORMATION j
10.
Yankee Rwe lgs #77-42 & 77-41 Cause:
Sludge plugged the radiator tubes on DG No. 3.
DG No. 1 also had radiator re:noved and sent to shop for cleaning.
~
's.
Cannent:
11.
Salen 1 LER ?76-012 Cause:
Cooling water lost to all 3 ECs due to the failure of a single service water isolation valve.
Ccmment:
/
./
'I/
s 16
GEEERAL $LECTRIC
~
PROPR;ETARY INFORMATl0N '
12.
Salem 1 LER 077-59 Cause:
DGs lA and 1B failed to reach rate speed during the start atterpt. 'Ibe cause was attrib.ited to the binding of the fuel rack linkage frcra the lack of lubreation.
s Ccment:
(
/
/
Lj 1
db 6
9 9
6 17
GENERAL ELECTRIO
~
PRDPRiETARY INFORMATION B.
Htrnan Error Common Cause Failure Potential (Actual Failures) 1.
Brunswick 1 LER 477001 Cause:
Simulated LCSP test. D3s 3_and 4 tripped on lw lube oil pressure because lube te::p was lw.
Standby heater tempe,rature setpoint raised and pressure trip time delay increased. Time unavailable 1.25 hour2.893519e-4 days <br />0.00694 hours <br />4.133598e-5 weeks <br />9.5125e-6 months <br />.
/
Comment:
r 2.
Calvert Cliffs LER 676044 Cause:
Operator error - both cooling water discharge valves left closed.
Closed valve 2 int.ead of opening valve 1.
Ccmment:
i.
j-18-
BENERAL ELECTRIC PROPRIETARY INFORMATl0N
~
a 3.
D. C. Cook 1 LER 479-9 i
Cause:
Both D3s unavailable simultaneously twice for a total time of 1.1 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />. No cause given, r
Ca=ent.
l t
4.
D. C. Cook 2
,LER 678-37 Cause:
Both D3s incapable of auto start.
'Ibe wrong starting air valves were closed for approximately 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />.
Ccmment: Same comments as No. 2.
5.
Davis-Besse' LER 480065 Cause:
Both DGs unavailable.
Serice representative renoved cotrol pwer frcrn essential bus withvat approval.
Time unavailable was 15 minutes.
Coment:
Same ccxment as No. 2
BENERAL ELECTRl0 PROPRIETARY INFORMATl0N 6.
Davis - Besse LER 479126 Cause:
Incorrect IX3 taken out of service for repair.
Both D3s unavailable for 20 minutes.
Ccr.nent:
Same ccr. ment as No. 2 7.
Millstone 2 LER 477-20 Cause:
Both D3s fuel supply valves were closed during outage.
Cc:nent:
Same cu...ient as No. 3.
8.
Peach Bottcra 3 LER #77-26 Cause:
DGs E3 and E4 were unavailable because of a loss of compressed air for starting.
'Ihe E3-E4 sectioning valve had not been ccrnpletely returned to the closed position after the previous maintenance, and the compressor had tripped on thermal overload.
16, hours.
- Cc.ent :
i
.w="
d 20 u --
r
'e ~
titWEHAL ELECTR!C FRDPRIETARY lhFORMATiBN 9.
Salen 1 LER ?80060 Cause:
The coerator disabled the service water for division 2 while division 1 was 6ce. for maintenance.
Cu..aent:
Same coment as No. 2.
10.
Farley IIR 679-32 Cause:
' Operator error. IG 1C and 2C breakers left racked out for 312 hours0.00361 days <br />0.0867 hours <br />5.15873e-4 weeks <br />1.18716e-4 months <br /> af ter maintenance.
Car.ent:
4
/
,p h
<. \\
l
'\\
f; cL/
l 4
21