ML20009F333
| ML20009F333 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 07/20/1981 |
| From: | Clark R Office of Nuclear Reactor Regulation |
| To: | Groce R Maine Yankee |
| Shared Package | |
| ML20009F334 | List: |
| References | |
| REF-GTECI-A-44, REF-GTECI-EL, TASK-A-44, TASK-OR NUDOCS 8107300304 | |
| Download: ML20009F333 (16) | |
Text
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gmsy-T V\\G-D c_5 Ws, - O N JUL 2 01981 8 I m, l 9
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Docket Ho. 50-309 v
h (4 hh a
L 9,W['b Mr. Robert 11. Groce v
Senior Engineer-Licensing Maine Yankee Atomic Power Company t-
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1671 Worcester Road
'k gG Framingham, Massachusetts 01701
Dear Mr. Groce:
Subject:
Infomation Request Regarding Station Blackout, Unresolved Safety Issue A-44, Maine Yankee Atomic Powee Station The NRC staff is currently addressing Unresolved Safety Issue (USI)
A-44, Station Blackout. The purpose of this work is to establish the safety significance of an event resulting in a loss of all alternating current power and, if significant, to consider the need for any specific changes. Over the past several years infomation requests have been forwarded which requested infomation that is being used in the USI analysis. Your interest and cooperation in the past have been appreciated.
At this time the USI A-44 effort is being directed toward determining the reliability of the onsite standby diesel generators. The enclosed questionnaire has been prepared to provide accurate operating experience to serve as a basis for such a detemination.
I'. ore specifically, its purpose is to obtain more detailed data than were available in previous diesel generator studies such as AEC-00E-ES-002, NUREG/0R-0660, and NUREG/CR-1362.
The questionnaire (enclosure 1) requests infomation in tabular fom and solicits data for the years 1976 through 1980, inclusive. There are four tables enclosed:
(1) Diesel Generator Operations Data, (2) Diesel Generator Scheduled Down Tine Record, (3) Diesel Generator Unscheduled Down Tine Record, and (4) Onsite Emergency Diesel Generator and Auxiliary Equipment Modification Record. Also enclosed are examples of ccnpleted tables as well as a clarification of what should be entered. Please note that, although it may appear that only Licensee Event Report (LER) information is sought, data on all diesel generator malfunctions, independent of whether an LER was prepared, is requested.
Please find enclosed LER documentation (enclosure 2) presently docketed for your facility. You are requested to review these and to indicate if there are other reports which have not been enclosed.
Finally, please find enclosed a copy of the appropriate portions of your response (enclosure 8107300304 810720 PDR ADOCK 05000309 F
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OFFn':1 AL R ECORD COPY usa m m -sw m yc smu 3:a oo am nncu uno
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!?r. Robert H. Groce 3) to cur letter of March 6,1978 which requested related, but different, infomation. This is being forwarded for your infomation only and should aid in preparing Tables 1 through 4.
In consideration of the time and effort necessary to obtain this information, the comsletion of :labic 4 should be considered voluntary. However, it should be noted that if operational and hardware modifications are not identified, the positive or negative influence of these features on emergency alternating current power reliauility may be lost in the evaluation of the data. The expected effect is that our generic reliability estimates may be lower than that which actually exists.
The above information is requested in accordance w;th Sections 103.b.(3) and 161.c of the Atomic Energy Act of 1954, as amended. To meet our schedule requirements for the resolution of 1SI A-44 and to incorporate as much real experience as possible into the reliability model for emergency powr systems, it is requested that your response be provided within 120 days of the receipt of this letter. However, if this schedule d
is inconsistent with priority requirements for other licensing work, please provide us with y5ur proposed date of response within 30 days.
We plan to complete our analysis of this data by Februr.ry 1982. Your data should be provided by that time so that an accurate assessment of onvtn alternating current power sources can be made.
Mr. P. Baranowrt;> has been designated Task Manager for USI A-44.
Should you have any quer. ions, please feel free to contact him at (301) 443-5921. Your time and efforts are appreciated.
DISTRIBUTION Docket Fil'iF50-309 P. Kreuner Sincerely, IN;NRCJ&LocalPDRS G. Requa TERA
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J. Ueletemes Original signed by GIB Reading ACRS (10)
Robert A. Clark ORB #3 Reading I&E (3) i D. Eisenhut OELD Robert A. Clark, Chief i
R. Purple P. Norian Operating Reactors Branch #3 i
J. Roe K. Kniel Division of Licensing T. Novak F. Schroeder R. Clasietosures:
T. Murley f
As Stated P. Baranowsky J. Butts cc: w/ enclosures Sco next page 9
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This request for informtion was approved by the 07fice of Management and Budget under clearance number 3M0-0067 which cxpires May 31, 1983.
Comments on burden and duplication my be directed to the Office of
!!anagement and Budqct, Washington, D. C.
20503.
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anc renu sia oo apncu oaa OFFIClAL RECORD COPY us= im-mmo i
7-Maine Yankee Atomic Power Company cc:
I E. W. Thurlow, President Mrs. L. Patricia Doyle, President l
Maine Yankee Atomic Power Compary SAFE POWER FOR MAINE-Edison Drive Post Office Box 774 Augusta, Maine 04C6 Camden, Maine 04843 Mr. Donald E. Vandenburgh First Selectman of Wiscasset Vice President - Engineering Municipal Building Yankee Atomic Electric Company U. S. Route 1 20 Turnpike Road Wiscasset, Maine 04578 Westboro, Massachusetts 01581 Stanley R. Tupper, Esq.
John A. Ritsher, Esquire Tupper and Bradley Ropes & Gray 102 Townsend Avenue 225 Franklin Street Boothbay liarbor, Maine 04538 Boston,liassachusetts 02110 David Santee Miller, Esq.
Mr. Rufus E. _ Brown 213 Morgan Street, N. W.
Deputy Attorney General Washington, D. C.
20001 State of Maine Augusta, Maine 04330 Mr. Paul Swetland Resident Inspector / Maine Yankee Mr. Nicholas Barth c/o U.S.N.R.C.
Executive Director P. O. Box E Sheepscot Valley Conservation Wiscasset, Maine 04578 Association, Inc.
P. O. Box 125 Mr. Charlbs B. Brinkman Alan, Maine 04535 Manager - Washington Nuclear Operations Combustion Engineering Inc.
Wiscassett Public Library Association 4853 Cordell Avenue, Suite A-1
.High Street Bethesda, Maryland 20014 Wiscasset, Maine 04578 Mr. John H. Garrity, Director Mr. Torbet H. Macdonald, Jr.
Nuclear Engineering & Licensing Office of Energe Resources Maine Yankee Atomic Power Company
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State House Station #53 Edison Drive Augusta, Maine 04333 Augusta, Maine 04336 Robert M. Lazo, Esq., Chairman Atomic Safety and Licensing Board U.S. Environmental Protectior. Agency U.S. Nuclear Regulatory Commission Region I Office Washington, D. C.
20555 ATTN:
EIS COORDINATOR JFK Federal Building Dr. Cadet H. Hand, Jr., Director Boston, Massachusetts 02203 Badega M8rine Laboratory University of California Bodega Bay, California 94923 Mr. Gustave A. Linenberger Atomic Safety and Licensing Board State Planning Officer U.S. Nuclear Regulatory Commission Executive Department Washington, D. C.
20555 189 State Street Augusta, Maine 04330
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Enclosuro 1 - Pcg3 10 TABLE 4 Onsito Emerg:;ncy Discal Cenarctor red Plect Name (Scaplo)
Auxilicry EquipmeIt Hodificction It:cstd Unit No.
Equipment or Date of Reason for Modification and procedure Mod.
Desired Improvement Description of Modification modified Lube oil system 2/76 Improve turbo charger lubrication Soak-hack pump was removed and replaced with a for emergency starts.
continuous lube oil pump. New pump also continuously lubricates the crankshaft.
R21ay cabin.:ts 1/78 Prevent dirt from fouling relay Cabinet doors with gaskets were installed.
contacts.
Instrument 6/79 Eliminate vibration damage to Cbntrol and monitoring instrument panel was R21ocation instruments relocated from the engine skids to a free standing panel mounted on the engin*. room floor.
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Encla uro 1 - Pcge 3 TAHl.E 3 Diesel Centrator Unschsduled Downtimo Record Plant Name Calendar Year 19 Unit No.
s.
Ceum.cnts - If any of the reported failures would not have been a LER Abstract Nte controls, the number of-starts per test is two.
If two or mere diesels are started simultaneously for any reason, please record it as a multiple start.
t DG No.: Enter each diesel generator's identification number in this column
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as shown in the example.
Number of Starts: Enter the sum of tha successful and unsuccessful start-attempts for each category. If there are several starts for each tact, include all of them, but be certain to record the number of starts per test in eclumn one.
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Number of Failures: Enter the num of the failures for each category. A i
failure is counted if the objectives of the test are not achieved. A aubsystem failure that does not cause failure of the diesel generator.
i system is not counted as a failure.
If tha diesel generator did not-start, run, and load as required by the cest, a failure should be recorded. However, if the diesel generator would have supplied power in some capacity for an emergency, please explain in Table 3.
For example, if the diesel started on the second attempt or the diesel was tripped to repair a minor oil leak that would not have been a problem in an emergency, this should be noted in Table 3.
I Percent Loading of DG OKW): Enter the percentage that the diesel is loaded for each category. The continuous kilowatt rating is considered
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to be 100%.
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Duration of Run Befere Stop for each DG Failure: Record the run-time for each failure. If the diesel failed to start, the run-time would I
be 0 min.
l Idertification of Failures: Attar.hed to this questionnaire are abstracts j
of the LERs related to the diesel generators. The abstracts are numbered l
starting with one. Refer to - this number to identify the failures, but if i
I there was a failure for which there is no abstract, assign the failure a i
l-number and include it in Table 3.
Table 2 Reason for Downtime: Enter in this column the categories of schedule ma'in-tenance that make the diesel generator unavailable for emergency service.
If the diesel generator is unavailable for emergency service during
)i surveillance testing, report that also, r
.-..- -. - -.. -.- l
Enclo:ura 1 - Peg 2 6, 2
i Tg le 2 (cont'd)
Hours of Downtime: Enter the number of hours that the diesel generator is unavailable for emergency service. Report the hours under the i
column reactor shutdown or reactor tot shutdown as appropriate-Comments: Conmsent on time to return to service after maintenance has begun, or other pertinent information.
4 Table 3 LER Abstract No. (Refer to attached LER Abstracts): The attached'LERs i
are numbered starting from one. Refer to this LER number in column-one.
Each LER abstract should have an entr-r in t'nis table.
If there was a failure not included in the attached' abstracts, please assign it a number and enter it in this table.
Dos.ntime Bours:
Enger the number of hours that the df.esel generator
- s ucsvailable for emergency service.
Subdivide these total hours into troubleshooting, parts delivery. and repair or replacement.
Comments: Use this coSimn to comment on the downtime and the failure.
If the reported failure was only a technical specification violation, but would not be a complete failure of the diesel generator to supply power or would only i,e a delay, clease elaborate in this column.
Table 4 Equipment or procedure modified: List in this c.olumn the equipment or procedures related to the emergency onsite power system that have s
been modified since the reactor became critical.
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Date of Mod.: Enter the date th t the modification was completed.
Reason for Modification and Desired Improvement: Report the reason for the modification and the desired or observed improvement in the system.
Description of Modification: Briefly describe what modification was made.
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Enciccure 1 - Pega 8 TABLE 2 Plcnt Name t-(Sempla)
Diecal Canarctor Schaduled Downtime R2 card Unit No.
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Calendar Year 19 _
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Hours of Downtime Rcccon for
_ Reactor shutdown Reactor not shutdown Comments Downtime U(jf Dgf gf DGF DGf DI
'Dgf f
DGI DGI Schsduled Haintenance Preventive 24 16 16 Haintenance f
Saci-annual &
Annual 1
j.
Equipment tbdification 8
8 8
Hodified lube oil on each diesel. Diesels down at different times.
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4 1
1 i
Time DC is unavailable for emergency service i
beccuse of required tests i
Down 4 hrs per test 8
48 40 48 I
Diesel cannot be automatically started j
during test or for three hours afterwards e
1
Enclo2ura 1 - Prgi 9 N
TART.E 3 Diesel Cenststor Unscheduled D:wntime R2 card Picat Mime XXX
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(Sample)
Calendar Year 19 _
Unt't No.
1& 2'.,
s.
I.ER Abstract Ni Downtime llours C mm nts - It any of the reported failures would not have been a (Refer o td allure under emergency conditions, please explain here.
a r
e-ar s, Del - Repair /
Refer to attached ms or the faHures Mated 1,n Mle 1.
ed LER Abstract s)Ilours shooting tvery.etc teplace 1
4 1
1 2
2 3
0.5 1
1.5 3
12 1
10 1
4
.0 0
0 0
Diesel started in 15 see instead of required 10 sec 5
0 0
0 0
Secondary air pressure low.
Primary air satisfactory.
6 0.
0 0
0 Secondary air pressure low. Primary air satisfactory.
7 0
0 0
0 Diesel started in 20 see instead of required 10 sec.
8 0
0 0
0 False DG start signal. DC satisfactqry No LER 9
0 0
0 0
Required DC starts after the failure of one diesel.
10 0
0 0
0 Starts to verify repairs.
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C0/b/0000001-0000006//
1 PAGE 387 ACCESSION NG.
0020160329 TITLE DIESCL GENE R AT OR 1 RIPS ON OVERSPLED AT MAINE YANKEC CORPAUTH MAINE YANKEE AlOMIC POWEh CO.
DATE 1930 TYPE G
MEMO LlR W/LER 80-018 TO U.S.
NRC, REblON 1,
SEP 22, 1980. DOCKET 50-309, l YP h --Pw R. MF G --CO M D, AE--SLW AVAll A VA IL Ab lLI T Y - NRC PUBLIC DOCUMEN1 ROOM, 1717 H STREET, MINIMUM CHARGE WASHINGTON, D.
C.
2ObSb (06 CENTS /PAGE 12.00)
ABSlR ACl D Al E OF EVEN1 - 062660.
POWER LEVLL - 065%.
CAUSE - LOUSE OVE R SPE ED TNIP SW IT CH.
DI E SEL GENERATOR, DG-1B, BEING OPERATED IN THE SURVEILLANLC MODE FOLLOWING MAINTENANCE. AUTO TRIPPED ON O VE R S P d E D.
DURING MAINTENANCE INVES11 GALLON 11 WAS DETERMINED T HA T THE OVERSPEED TRIP SWITCH ACTUATING ARM hAS LOOSE.
ACTUAllNG ARM WAS llGHlENED AND SURVE1LLANCE TEST COMPLETED SATISFACTORILY.
COMPGNENT CODE I NST RU-INST RUMEN T AT ION AND CONTROLS SYSlLM CODE EE-eMERG GENER AT OR bYS L CONTROLS C4 /b /0 0 00 0 01 -0 0 0 00 06 //
2 ACCES SI ON NO.
00Z015S304 13TLE DIEbEL GtNERATGR OUTPUT BREAKER F AILS TO STAY CLOSED AT MAINE Y AN K E L CORPAUlH MAINE YANKEE AlOMIC POWER CO.
DATE 1960 1YPE O
MEMU LlR W/LER 060-003 TO U.S.
NRC, REGION 1.
FEb.
14, 1980, DOCKET 50-304, l YP E --P W R, MFG--COMD, AE--SLW AVAIL AVAILAblLilY - NRC PUDLIC DOCUMENT ROOM, 1717 h STREET,-
WASHINGlON, D.
C.
205S6 (OS CLNTS/PAGE -- MINIMUM CHARGE
$2 00) abs 1hACl DAlb OF FVENT - 011660.
POWER LEVEL - 000%.
CAUSE - WEAK PROP P its SPRING ON TR IP LATCH ROLLERS.
DURING ROUTINE REFUELING I NT ER V A L SUR VE !LL ANCE OF THE "B"
1 RAIN DIESEL GENER ATOR. THE CENERATUh U U TP UT bRLAKER FAILED TO RE M A IN CLO SE D FOLLOWING THE FASL S T '. R 1 I LS T I NG.
THE DIESLL LNGINE STARTED AND CAME UP TO SPtLL. AND T HE GENERAlOR OUTPUT OREAKER CLOSED, ALL WITHIN THE REQUIRED TIME FRAME.
HOWEVER, UPON CLOSING. THE OUTPUT OREAKER IMMEDIATELY REOPENED.
THE "A"
TRAIN DIESEL GLNLR A T OR REMAINED UPtRAbLE 1HROUGH 1HL PERIOD.
THL LNTIRE LOSS OF AC TEST WAS RLPLAlLD, WilH T HL BREAKER CLOblNG AND REMAINING CLOSED AS EXPECTLO.
FOL LO w l N G SUCCESSFUL COMPLETION OF 1HE TEST. THE GENERAL ELECTR IC lYPE AM 4.16 2SO-lHB bhEAKER WAS INSPECTED.
THE INSPEL1]DN R EVE ALED A WEAKENED PROP PIN SPRING ON THE TRIP L ATCH ROLLERS WH I CH hAS CAUSING THE BREAKER TO OCC AS I ON ALL Y UOUNCE OFF T HE LATCH.
lHE SPRING WAS RETENSIONLD, AND THEN THE OhEAKER WAb CYCLED.
~COMPONEN1 CODE CKlbRK-CIRCUlf CLOSERS / INTERRUPTERS SY Sl L M CODE LL-LMERb GENER AT OR SYb b CONTROLS
~.
- e 44 /b/ 0 0 0 0 0 01 -0 0 0 u0 06//
3
, ACCESSION Nu.
00Z0154044
.TilLE UPDAlt hcPORT ON DIESEL GENERATOR TURBOCHARGER FAILURE AT MAINE Y ANK E E CORPAUlh MAINE YANKLL ATOMIC POWER CO.,
WISCASSET, ME DATL 1960 TYPE O
MEMO 4 PGS, LTR W/LER 79 -0 2G/ 03L-O TO NRC OFFICE OF 1 L E.
REGION 1.
J AN. - 1 1, 1960, DOCKET S0-309. T YP E -- P WR, M F G --CO M B., AE --S E W AVAIL AVAILAblLITY - NR C PUBL I C DOCUMENT ROOM, 1/17 H STREET, MINIMUM CHARGE WASHINGlON, b.
C.
20SSb (06 CENTS /PAGE
$1.00)
AOSlRACl D All OF EVENT - 101679.
POWLR LEVEL - 097%,
CAUSE - T HRUST BEARING F A I L UR E.
DURING A SPLCIAL TES1 OF ONE OF THE PLANT'S Two EMEHGLNCY DIESEL GENERATORS, lHE DIESEL ENGINE TURBUCHAPGER FAILEb WHICH RLSULT ED IN A FIRE WilHIN THE ENGINE'S EXHAUST SYSTEM, AND EV EN 1 UA L.L Y CAUSED THE ENGINE TO SHU1 DOWN.
THE CAUSE OF T HE T UR BOCH ARGER FAILURE ON THE GM ELEClRO-MOTIVE DIV.
MCDEL 20-04534 DIESLL ENGINE IS A THRUST BEARING FAILURE AS IN0!CATED hY T HE DAMAGED THRUST FACE.
THE FAILED BEARING ALLOWED 1HL ROTAllNG ASSEMBLY 10 MOVE FORWARD.AND 10 DAMAGE THE IkPFLLER, THL CO MPR E S SUR GEARING SUPPORT, THE DIFFUSER. THE e xil AUS1 D I F F US ER. THE HEAT DAM WASHER AND THE TUROINE WHEEL.
M A
0G/b/0000001-00u0006//
3 CONTINUAllON 1
PAGE 388 l HE RESULTINb WebALANCE CAUSED THE ROT AT ING ASSEMBLY TO DAMAGE j
lHE C ul/ PH E S 50'1 O L AR ! f,G. THE TURblNL Uc* RING AND ALL THE LAbYRIN1H SLALS AND ALSO CAUSED 1HE 1URBINL WHEEL DLADES TO RUB THE SHROUD.
COMPONENl CODE L NG INL-LNG I NES I NT ERN AL COMBUSilON
' SY Si t k CODE LE-LMERG GENER AT OR SYS & CONTROLS CC /b / 00 000 01 -0 0 000 0G //
4 ACCESSION NO.
OUZOIS2995 131LL Dit.SEL GENERA 104 CAlCHES ON FIRE Al MAINE YANKEE CORPAUTH N
,NE YANKEL ATOMIC POWEh CO.
'DATL 1979 lYPE O
MEMO L1R W/LER 79-026 10 U.S.
NRC. REGION 1.
NOV 14.
1979. DOCKET 50-309. 1 Y P E -P W R, MF G-COMB,
AE--b+ W CONTROL--027380 AVAIL AVAll.AblL1IV - NRC PubLIC DOCUMENT ROOM. 1717 H STREET.
WASHINGTON D.C. 205bb, (08 /PAGE -- MINIMUM CHARGE S2.OO)
- ABSTRACT D AT E OF EVENT - 101679. POWER LEVLL - 097%. CAUSE 1URUOCH A RGER F AILURC.
DURING A SPECIAL TEST OF AN EMERGENCY DIESEL GENE R AT OR, DIESEL ENGINE 1URBOCHARGER FAILED WHICH RLSULTED IN A FIRE wilHIN ENblNE'S EXHAUST SYSTEM. AND CAO$CD ENGINC 10 S HUI DOWN.
INT ERNAL F I RE REQUIRED EXTENSIVE COOLING OF EXHAU5l COMPONENTS BEFORE REFLASH COULD BE PREVENTED.
REDUNDAN1 D/G AND OFFSITE POWER WERE AVAILABLE. ROOT CAUSE OF T UR BO C H AR GE R F AILU<E 0 14 GM E LE CT R O -MO T I V E DIV. MODEL 20-64bE4 DIESEL ENGINE WAS NOT DETERMINED.
PLANT HAS ASKED MANUFACTURER F OR A FAILURL ANALYSIS REPORT.
APPLICABLE PORTIONS OF DIESEL ENGINL HAVE bEEN DISASSEMBLED L INSPECTED, WllH NO ADDITIONAL DAMAbE tVIDENT.
FAILED TURBOCHARGER UNIT REPLACED.
COMPONLNT CODE ENG INE -Lt.G I NES,1 NT E RN AL COMBUSTION
,SYSlLM CUDE LE-EMERG GE NER ATOR SYS L CON 1ROLS 44/S/0000001-0000006//
b
'ACCEbblON ND.
00/01414e,0 T1TLE DIESEL GtNLR AT OR LOAD DROPS OFF AT MAINE YANKEE C04 PA U1 H MAINE YANKEE AlOMIC POWER CU.,
WISCASbET ME DATE 1978
^ TYPE O
MEMU J PGS. LlR W /d O 7e-023/03L-O TO NRC OFFICE OF I L E.
REGION I,
bEP1. 29, 1976. DOCKEI S0-309. TYPE--PkR.
MFG--COMB.,
AE--STONE L WEH5TER
-AVAIL AVAILAalLliY - NRC PUBLIC DOCUMENT ROOM, 1717 H STREET, WASHINGlON D.
C.,
2065S. (06 CENTS /PAGE - MINIMUM 52 00)
ADS IR ACT ROUTINE PREVENTAllVE MAINTENANCE WAS PERFORMED ON EMERGENCY DIESEL GEN E R AT OR DG-lb.
FOLLOWING COMPLETION OF THIS MAINTENANCE. Db-lu WAS STARTED. BROUGHT UP TO SPEED, AND LOADED.
IN 'i H E PROCESS OF LOADING THE GENERATOR. THE OPERATCOS NOllCtD A S L UG G I SH R t-SP ONS E TO LOAD INCREASE.
- SHORTLY, T HERE AF i tR, THE GENERATOR LOAD BEGAN TO DROP OFF.
AIR IN THE DILLCL FUEL LI Nt b WAS THE PROBABLE CAUSE.
THE FUEL DIL LINES WERE PUHGEC OF THE ROUTINE MAINTENANCE INCLUDED CHANGING THE-e F UE L OIL FIL1ERS.
DURING THIS FIL1ER CHANGE. THE INTRODUCTION OF AIR INTO IH E FUEL LINES IS POSSIBLE.
AIR. THE DIESEL STARTED AND lE S1 RUN SATISFACTORILY.
. COMPONENT CODE ENG INE-CNGINCS,I N TE RN AL COMDUS110N SYSTEM COJL Et-EMERG GENLRAlOR bYS L CONTROLS 44/S/0000001-0000006//
6
^ ACCESSION rO.
00Z0136436
- CORPAUTH M AINE YANKtE ATOMIC POWER CO., WISCASSET. ME
.DAIE 1970 lYPC U
MEMU 4 PGS. LTR h /R O 7E-OO3/03L-G 10 NRC OFFICE OF 1 L E.
REGION 1.
l FEa. 23, 19?o. DOCKET SO-309, lYPE--PWR, M F G --C O M O., AE--STO4E 6 WLBSTLR l AVAIL AVAILADILIT'r - NRC PUBLIC DOCUMENT ROOM. 1717 H STREET, WASHINGION.
D.
C.
20545 (08 CENTS /PAGE - MINIMUM CHARGE l
"ADSlRACT D AT E OF EVENT - 021676.
POWER LEVEL - 100%.
CAUSE - DIRTY C ON I A C T ::. UN PR IN T ED C IRC UI T CAkDS.
EMERGENCY DIESEL GENERATOR Db-1A wAb ST AR TE D F OR T R A I N l twG.
hMILE ATTEMPTING TO PHASL 1HE i
GEN A:9ATEA TO THS BU S, 1T WAS FOUND lHAT THE ELECTRIC SPEED i
GOVCHwm WOULD ND1 RESPOND.
DG-1A WAS SHUT DUWN.
CONTINUITY i
J
,e 44/5/0000001-0000006//
-6 CONTINUAT10N 1
PAGC' 389 CHECNS wERL PIhF GhM ED AND PRINTED CIRCUIT CARDS WERE-REMOVED AND INSPEC1ED.
ALL INDICATIONS WERE' SATISFACTORY.
AFTER THE PC CARDS wtRE RElhSlALLED. THE DILLEL OPERATED SA11SFACTORILY.
lHE PROB AULE C AUSE FOR 1HE' MALFUNCTION WAS A-DIRTY CONTACT ON A 5
PC C ARD.
~COMPUNENT' CODE ENGINE-LNGINLSelNTERNAL COMBUSTION 5YSTEM CG3C EE-L v.LH G btNER ATOR SYS L' CONTROLS' 1
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