L-78-206, Forwards Info from Diesel Generator Questionnaire,In Response to NRC
| ML17341A434 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 06/15/1978 |
| From: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML17341A432 | List: |
| References | |
| REF-GTECI-A-44, REF-GTECI-EL L-78-206, NUDOCS 8108170091 | |
| Download: ML17341A434 (22) | |
Text
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Enclosure 3
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1P'AY June l5, l978 L-78-206 Director of Nuclear Beactor Regulation U.S. Nuclear P~~atory Ccrmission Nashincton, D.C.
20555 Dear Sir.
Fe:
Turkey Point Units 3 and 4
Dccket Nos.
50-250 ard 50-25l Diesel Generator. Questionnaire
'The attachr3 information is sdmtM in response to a letter rem i<ml R. Goller dated Decenber 15,1977.
Very truly yours, t
Bo~~ E. Uhrig Vice P esident
~ut.'Q~/i:al
-"C. M~i Mv Ja~zs D.
Q ~oiliy, ~cv-ion TT Pci=e:
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PDR ADOCK, 05000250
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e If y e s,
( o the r, th a n ha nd po rta b 1 e fire ex ti ng u i she rs )', then i de n ti fy gases a nd g i ve approximate ta nI'ize.
.3 Volume (ft )
Gases S.
Are any ~forei n Oases such as propane, freon, halon, carbon dioxide, e:c.
stored in the:, Diesel Engine:room?
Yes
)io or adjacent buildings?
'Yes lio T'.
Does.control system automatically bypass, in emergency
- starting, any engine temporarily out of service for mainteriance?
Yes Wo X
If yes, then how many failures to bypass have occured?
L U.
Does the control system automatically override the test mode under emergency conditions?
'Yes
,'no Y'.
Have repetitive mechanical failures occurr d in. any component part or subsystem of he eng',ne, generator,
.or swi tch gear, etc.?
Yes
'.(
i90 If yeS, then WhiCh part Or SubSyStem?
-'K'd Breake=.
'~a".e=
S'ys"em, iuel S'v'StKls SiGZikang I'1T.
How many failures? Zoo=ox.
15 Give nature of failure.
""lec"rica1, 1ow ress.
x M.
Gould period'c (yearly or other) evaluation and/or testing by "outside experts" contribute significan'tly. to the diesel-generator reliabi'lity?
Yes X
Ho Give brief reasons for the answer.
This s the practice at PTP.
e X. 1.'ive the accumulated tine-load operating record for each diesel-generator unit from installation to the present (Running Hours):
A 9/14/71 Preoperational test Date B 8/6/71 Engine ':
Surv. Testing 5
Emsergency Total
- Serial Ho.
Haintenance Hrs.":
and Other Hours Ho Load
- Loaded Service Hr's.
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A 1398
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447.7 B
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1302 389. 9
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DG are only run for surveillance tests
& post maintenance no record to separate each; 2.
Surveillance test. load (percent of continuous rating) 110%
-3.
Give the projected or planned time-load operation for each diesel-generator unit during the next 12 months.
27,50 K'J 2750 KW, 2500 KV
- Surveiliance E
Emergency
- Haintenarsce Hrs.
and other Service Hrs.
I otal Houl s 30 0
30 4.
Prov'.de
'h fol loving sunmary of the periodic surveillance testin experience:
r a.
Starting date of surveillance testing (OL dat
)
7/19/72 b.
Periodic test interval Bi-weekly c.
Total number of surveillance tests performed a'oout 180/engine d.
Total n'unber of test failures 9
(fail. of Air failure to start 5
failure to accept load 6
Bker to clos failure to carry load o
failures due to operator error 1
failure due to equipnent not beino operative durinq esaergency cond>
i ons 0
e.
Supply a copy of the surveillance test procedures
~.ith this conp1 e ted ques t i onna i re.
ThDLL 1 Dj,cscl Generator Opcrntio>>a DnL'n Calendar Year 19 Enclosure 1 Page 1
Pi <<iL Hlaie Unit Ho.
Reason for DG Operation
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6 aclleduled D<<ration of Ru>>
Teel>.
Sjicc Rcq'd Test DG Ho.
llumber of Starts Numl>cr Percent Durntion of Run of 1.oa 1 l>>g o f Rc fore S top Por Fall <<rCi
~DO
~K1l KSCb DG FSilnrc Idcntificntion of Failure Refer to attaclied 1,1!Rs or Table 3
DG Actual Demand Starts not for Testing Hiscellaneous Tests (gpecify Type)
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TAllLH 2 Diesel Generator Schcdi!lcd Downtime Record Calendar Year 19 L'nclosure 1 Page 2
Plant liame Unit No.
Q llours of Dow!!time Reason for Downtime Reactor.
shutdown Reactor not shutdown Comments N
Scheduled Haintenance Time DG is unavailable for emergency service because of required tests
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'I'Alll.l'. 3 Dic'ocl Generator Unachcilulcd Dowutiml.'ecoril Calendar Year 19 Fnclosure 1 Page 3
I'lant Name Unit No..
LER Abstract N~
(Refer to attcl ed I.L'R Abstract Total llours I'roublc-o~hoo till
'arts',Dcl
~Lv or cL'c Downtime llours Rcpnl.r/
L~olor.o omments
any o the 'reporte~
ai ures wou not
>ave been a
failure under emergency conditions, please explain here.'efer to attached LERs or the failures listed in Table l.
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TAIII,I," Il Onaitc I:aicrgcncy Diesel (:cncr>>tor and Auxflialp E<lulpmcnt Modification Ilccord Enclosure 1 Page 4
l'lant Home Unit Ilo, Equipment or procedure modl.fied Date of Ifod.
Itcaoon
'or Modification and Deoircd Improvement Description of Modification
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osure 1 Page 5
TABLE ENTRIES EXPLANATIONfCLARIFICATION Table 1
e Reason for DG Operation and Scheduled Duration of Run:
This column contains the different categories of diesel generator operation.
The categories are structured such that the start and run conditions are similar for all of the tests in a category.
In this column, enter the scheduled run duration for each of the test categories.
Also enter the number of diesel generator starts that are done for each type of test.
For example,'f on the monthly test there is one start from the local con-trols and one start from the remote controls, the number of starts per test is two. If two or more diesels are started simultaneously for any reason, please record it as a multiple start.
.DG No.:
Enter each diesel generator's identification number in this column as shown in the example.
Number of Starts:
Enter the sum of the, successful and unsuccessful start attempts for each category.
If there are several starts for each test, include all of them, but be certain to record the number of starts per test in column one.
Number of Failures:
Enter the sum of the failures for each category.
A failure is counted if the obgectives of the test are not achieved.
A subsystem failure that does not cause failure of the diesel generator syste~ is not counted as a failure. If the diesel generator did not
- start, run, and load as required by the test, a failure should be recorded.
However, if the diesel generator would have supplied power
'n some capacity for an e ergency, please explain 'n Table 3.
For example, if the diesel started on the second attempt or the diesel was tripped to repai" a minor oil leak that would not have been a
problem in zn emergency, this should be noted in Table 3.
Percent I.oading of DG (KbT}:
loaded for each category.
to be'00%.
Enter the percentage that the diesel is The continuous kilowatt rating is considered Duration of Run Before Stop for each DG Failure:
Record the run-time
'for each failure.
Zf the diesel failed to start, the run-time would be 0 min.
Identification of Failures:
Attached to this questionnaire are abstracts of the LERs, related to the diesel generators.
The abstracts are numbered starting with one.
Refer to this number to identify the failures, but if there was a failure for which there is no abstract, assign the failure a number and include it in Table 3.
Table 2
Reason for Downtime:
Enter in this column the categories of schedule main-tenance that make the diesel generator unavailable for emergency service.
If the diesel generator is unavailable for emergency service during'urveillance testing, report that also.
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Enclo re 1 Page 6.'able 2 (coht'd)
Hours of Downtime:
Enter the number of hours that the diesel generator is unavailable for emergency service.
Report the hours under the column reactor shutdown or reactor not shutdown as appropriate.
Comments:
Comment on time to return to service after maintenance has
- begun, or other pertinent information.
Table LER Abstract No. (Refer to attached LER Abstracts):
The attached L~
are numbered starting from one.
Refer to this LER number in column one.
Each LER abstract should have an entry in this table.
H there was a failure not included in the attached abstracts,
.please assign it a number and enter it in this table.
Downtime Hours:
Enter the number of hours that the diesel generator is unavailable for emergency service.
Subdivide these total hours into troubleshooting, parts delivery, and repair or.replacement.
Comments:
Use thi,s column to comment on the downtime and the failure.
Xf 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 be a delay, please elaborate in this column.
Eauipment or procedure modified:
List in this column.the equipment or procedures related to the emergency onsite power system that have been modified since the reactor became crit cal.
Date of Nod.:
Enter the date that the modification was completed.
Reason for Modification and Desired improvement:
Report the reason
=or the modification and the desired or observed improvement in the system.
Description of'odification:
Briefly describe what modification was madel'
TARI.E 1
(Samp3,c)
Diesel Generator Oper>>L'o>>J Data Cnlc>>ilnr Y<<ar 1976 Enclosilre I I'agc 7
I!1nnt Nn)xn xxx Unit Nn.
1 1
2
)
Reason or DG Operation, 6 scl>cduled Durntio>> of Run Tech. Spec'eq d Test Mo>>tl>ly Surveillance (I hour)
(I start/test)
DG Ho.
Humber of Stnrta 12 12 12 Humb er.
Pe rce>> t of I.onding of Pnilurcs DG (KM) 100 100 100 Duration of Run Before Stop Por Each DG Failure 30 min' min 0 min Identification of lrailures Refer to nttacbed I.l'.Rs or Tnble 3
IERg 16,l<
I.Elt 82 Refueling Outage (I2 hours)
(I start/test) 100 100 100 1 1>our LER tt 3
Misc. Tech Spec Req'd Tests (Start Only)
(I start/test) 100 100 100 Table 3 Ho 9
DG Actual Demand Starts not for TCJx ting SIAS Signal (I hour)
I.ER g
g Multi le start of 3 DGs Misccllaneobs Tests (Specify Type)
Veri.fy Repairs (not full test)
(S tart Only) 0 12 0
0 min Table 3
II 10
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TAIIIE 2
(Sample)
Diesel Generator Sclieduled Downtime Record Calendar Year 19 Encl'osure I Page 8
Plant Name Unit tio, Reason for Downtime Scheduled Halntenance Reactor shutdown llours of Dowritlme D(
D)
DG DG Reactor not shutdown Comments Preventive Haintenance Semi-annual 6
Annual 24 16 Equipment Hodificatlon Hodified lube oil on each diesel.
Diesels down at different times.
Time DG is unavailable for emergency servic because of required testa Down 4 hrs per test 48 40 48 Diesel cannot be automatically started during test or for three hours afterwards
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Thl)I.E 3 (Sample)
Dlcacl Generator llnacliriliilcilDowntime Record Cnlcnilnr Year 19 t
Enclosure 1 Page 9-Plnnt tlnmc Untt No.
162'e I.ER hbs trnc t Ni (Rcfcr to nttcl cil I.ER hbstracl Dowlltlmc Ilours Total llours lroublc-e~hoo tin
'nrts,Dcl-Rcpnif/
2~oct etc
~tc Ince omitiento nny o t ie rcporte n
urea wou not linve cef> a fnilure ifndei emergency conditions, plense expln'in lierc.
Refer t'o nttachcd. I,ERs or tlic failures listed in Tnhlc I.
1 2
3 Ii 5
fi 7
0 No IER 9
10
~i 3
(2
.0.
0 0.
0 0
0 0
1 0.5 1
0 0
0 0
0 0
0 1
1 10 0
0 0
0 0
0 0
2 1.5 1
0 0
0 0
0 0
0 Diesel started in 1S aec instead of required 10 sec Secondary air pressure low.
Primary air satisfactory.
Srconilary air pressure low.
Primary air satisfactory; Dicacl started in 20 sec instead of required 10 sec.
False DG start signdl.
DG satiafactqry Reqiiired DC starts after the failure of one diesel.
Starts to verify repairs.
TADLE 4 (Sample)
L'quipment or procedure modified Date of Mod.
Onsite Emergency Diesel Generator and huxlliary L'quipment Modification Record Reason for Modlf)cation and Desired Improvement Enclosure 1 Page 10 Plant Name Unit No.
Description of Modification Lube oil system 2/76 Improve turb'o charger lubrication for emergency starts.
Soak-I~ack pump was rem'oved and replaced with a continuous lube oil pump.
New puma also continuously lubricates the crankshaft.
Relay cabinets Prevent dirt from fouling relay contacts.
Cabinet doors with gaskets were installed.
Instrument Relocation 6/79 Eliminate vibration damage to instruments Cbntrol and monitoring instrument panel was relocated from the engine skids to a free standing panel mounted on the engine rqom floor.
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Enclosure 2
PAGE 571 ACCESS I QN NQ ~
1 I'ILE CORPAUTH DA'IE i YPE i lf=hfQ AVA 1L AbSlRACT COhiPONEl T CODE SYS TEl"i CODE 0 OZ 0 1 50369 D IESEL Gi NE.RATOR STOPS DUE f 0 LOCKOU I RELAY ACTUATION AT TURKEY PQI NT F LOR I'DA POWER 6
L IGHT CO
] 979 0
Llf4 W/LLR 79-008 TQ U ~ Si NRC e REG ION 2 e JUN 25i I 979~
DOCKET 50 25 1 s TYPE PWR e Mf= G WEST v AE ~ECH CONTROL O26223 AVA)LABIL I TY NRC PUBLI C DOCUMENT ROOMi 1717 H
STREET ~
WASHINGTON D ~ C ~
20555~
( 08
/PAGE -- M1NI MUhh CHARGE $2~00)
D ATE.
OF EVENT 052679 o
POWER LEVEL 00 0/i o CAUSE I MP ROPER T IME DELAY RELAY SE TT INGS~
UPON COMPLET ION OF REFUEL ING OPERATI QNS AND PR IOR TO RESTART ING THE UNI T ~
THE SAFEGUARDS SYSTEh 5 WERE BEING TESTED+
THE 4A 4160 V BUS FAILED TO STRIP rN THE' IME REGU1RED WHICH CAUSED THE A
EMERGENCY DIESEL GENEHA I OR TO S'TOP DUE TQ LOCKOUT RELAY ACTUATION~
TWQ Uf'fDERVOLTAGE T IME DELAY (BUS STRIPPING)
RELAYS WERE FOUND TO HAVF IMPROPER SE'I T I NGS~
THE RELAYS WERE RESET AND THE TEST WAS COh'DEPLETED SUCCESSFULL'Y ~
THE 8 EDG WAS OPERABLE DURING 1HE OCCURRENCE
~
Tl-!F ROOT CAUSE WAS NOT DETEHMI NEDDY THE UNDER VOLTAGE R ELAYS HAD OPERATED SAT I SFACTQR I LY 2 h'iOllTHS PR I OR
'I 0 1HE SAFE GUARDS TEST A PER I OD I C T
ST OF THE EMERGENCY LOAD SEQUENCER DE VI CES, WHICH IS PERFORkED MONTHLY.~ WILL BE REVI SED TQ INCLUDE A V ISUAL CHECK OF THE UNDERVOLTAGE RELAY SETTINGS ~