ML20033D161
| ML20033D161 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 11/16/1981 |
| From: | Pilant J NEBRASKA PUBLIC POWER DISTRICT |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| REF-GTECI-A-44, REF-GTECI-EL, TASK-A-44, TASK-OR CNSS810718, NUDOCS 8112070318 | |
| Download: ML20033D161 (18) | |
Text
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COOPER NUCLEAR STATION Nebraska Public Power District
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CNSS810718 November 16, 1981 gy l'
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Mr. Thomas A. Ippolito, Chief r3 Operating Reactors Branch No. 2 k u,4^%g
/887* f-1/
Division of Licensing U.S. Nuclear Regulatory Commission O
4tg Washington, D.C. 20555 y,f/
Subject:
Information Request Regarding Station Blackout UnresoN/c' Safety Issue A-44, Cooper Nuclear Station.
Dear Mr. Ippolito:
Your letter of July 20, 1981 requested information concerning the re-liability of the onsite standby diesel generators.
Four tables were provided in that letter to record solicited data for the years 1976 i
through 1980, inclusive. These tables have been completed and are hereby forwarded as enclosures 1 through 4.
With regard co Table 3, total downtime hours are provided for each l
instance of unscheduled diesel downtime as requested.
Specific times for troubleshooting, parts delivery, and repair / replacement however are not included in the station records.
Entries in thosa categoriec have been provided only where the times are specifically known.
i l
If you have any questions concerning the information provided, please contact us, t
Sincerely, i
M i
J.
. Pilant Division t anager of Licensing and Quality Assurance JMP: DAW:cg Enc.
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-8112070318 81111 *1-PDR ADOCK - 050002
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Pinnt gaan e Cooper TAlllE 1 Discal Cencrator Oparations Data Unit flo.
1 Calendar Year 19 E Ilesson for DC llumber fluiabe r Percent Duration of Run Operation, & scheduled DC.
of of 1.oading of Defore Stop For Identification of Follure or T.!de_j)_,.
Durntinn of Riin llo Starta Fa t lurce 11 0 (KW)
Fach DO Failure (Refer to at t acbed i Elis g
Tecle. Spec Ileq'd Test
~
Monthly Surveillance 1
13 1
35%
1.9 hr.
LER #17 (2 hr.) (1 start / test) 2 14
_1 35%
.03 hr.
LER #15 Auto Start Surveillanci-1 2
j 1
<85%
.05 hr.
LER #16 (1 start / test) 2 2
<85%
I Annual Inspection (4 starts / test) 2 4
Misc. Tech. Spec. Req.
1 7
35%
(30 min) (1 start / test DG Actual Demand Starts not for Testing I
8 2
8 tilacellaneous Testa (Specify Type)
Verify Repairs / Mods 1
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Pinnt itai e cooper TAtlE 1 Diaoel Gansrctor Opstatiens Data Unit H3.
I Cslendst Yacr 193 IIcanon f or DC llumLer fluiabe r Percent Duration of Run Operation, & scheduled DG of of Loading of Defore Stop For Identification of Failure thera t ion of Ihn Ho, Starts.
Fa i l urce DC (KW)
Fncle DG Failure (Ref er to at t ached I.I?ibs o r T.it l e_])_._,
Te cle. Spec Reg'd Test 1 90*'
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16 5
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> nn-to-Start Surveillance 1
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qual Inspection 1
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2 Unknown, Unknown LER #3, LER #4 sc. Tech Spec Req.
I 16 1
> 80%
.06hr No LER #24
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0 min) (1 start / test) 2 13
> 80%
DG Actual Demand Starte not for Testing l'
10
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In Hiscellaneous Tests (Specify Type) rify Repairs / Mods 9
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na'lE 2 Diesel Generator Sclieduled Downtimo Hecord Plant NameCooper Calendar Year 193 Unit No.
1
.Ilours of Downtimo Henson for Reactor slautdown Reactor not sliutdown Comunent s Downtime gx;r DCF 7Cf~ 71CF ~UCF Tinf~ TCI 71CF 70#
7iUF 1
2 Scie =Juled Haintenance reventative Maintenance 3.7 5
l Time DG 1.s unavalloble f or emergency service because of required
{
tests i
- aual Inspection i14.5 j.g
.mclosure (2) o
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.44W464m
TAtl.E 2 Diesel Concretor Sclindialed Downtimo Record Plant lisma Cooper Calender Year 1922.
Unit llo.
1 Ilours of Doweitime Reamun for Reactor sliutdown Reactor s t sliutdown Comumen t e Downsimo DGF UGr DCF 7CF TF EUFlTCP 7CF 7F ~[igf Sclieduled
~
Haintenance J
I Time DC is unavalloble for emergency service Isecause of required tests
- nual Inspection 37.3 78.3 o
8
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Tale 2 Dieus! Gens.rator Scliaduled Downtimo Hecord Plant litas Cooper Calender Year 19 Unit No.
1 Ilours of Downtime Henson for Heactor sliutdown Reactor not sliutdown Commenta NW"EI"4 UGF UGF 7Cf' TF TT~ TRIF R F 7CF T f T F 1
2 1
2 Scteeduled Haintenance mventative Maintenance 37.8 78.3 onipment Maintenance 4.3 5.6 IGE and IFE breaker work. Diesels down at different times.
Time DC f u unavallol2lo for emergency service bscause of required tests nnual Inspection 56.1 112.1
TAnlE 2 Dicaol Gancra Nr clinilute Downtime Hecoral Plant HectCoopa Calendar Year 193 Unit No.
1 Ilours of Downt ime Reason for Reactor sleutdown Reactor not sleutdown covunen t a Iksunt1me DUF 'IICF ~~IICf' 7Cf Tf' TICF ~IICF 7TCF 7Cl- ~TICF 1
..Sclieduled Itaintenance reventative Maintenance 174.0 43..
4 Time DG is unavailable for emergency service because of required 4
tests atual Inspection 27.2 l
i s'
8,
" ~ ~ '
- _ -. _ ~ _
WIE 2 Diesel C nerator Sclinduleil Downtime Hucurd Plant flama Cooper Calender Year 1%
Unit llo.
1 Ilours of Downtline Neanson for Reactor shutdown Reactor not sliutdown Comanent a Downsime
-gn;r UCG 7Cf' 71U7-'lTCF IInf{ TC#2 DCI ~DUI
~IIUI Sciuduled Haintenance ecial Test Run 4
i A
Time DC is unavalloble for emergency service 8,
bacause of required tests
.aualLInspection l
TAllt.E 3 Diecal Cencrator Unactieduled Downtimio itocosil l*lant Naine Cooper Calendar Year 193 Unit No.
1
]
1.ER Abstract H Downtim. Ilours ma pra -
any tiie regi rted failures would not liave been a (Refer to attel f ailure un er emergency conditions, gilease explain lies e, a
u e-a e, e era r e er o att aclied I.ERs or clie f ailures listed in Talite 1 ed LER Alist raca s)Ilours sliooting tvern ey teplace 15 3.72 16 2.0 17 1.87 9
Enclosure (3) i st,*,
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TAllt.E 3 plesel Cencrator Unscheduled Downtisue itecoral l*lant Haeno Cooper Calendar Year 19 y Unit No.
1 Downtime llours ommenta - H any os the reported failures would not have been a LER Abstract H.
(Refer to artcl allure under emergency conditions, please explain hese, Total Trouble-l'a r t s, Del Repatr/
Refer to attached Leks or the failures listed in Table 1 ed LER Abstraci 3)Ilour s shooting tvery3ettteplace 12 3.23 13 0
This LER does not pertain to DC's.
14 11.6 Fuel all return line leak. DG would have been operable under emergency conditions.
No LER 18 27.55 19
.67 Oil leak on cover. DG would have been operable under emergency conditions.
20
.73 Minor fuel oil leak. DG would have been operable under emergency conditions.
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TAllt.E 3 Die =al Cesseretor Unscheduled Downtimo itecos al Plant Haine Cooper e
Celsudsr Yact 19 Unit No.
1 g
Downtime llours Cments - H any of time rep rted failures would not lieve been a 1.ER Abstract N.
ure under emergency conditions, please explain heie, (Refer to attcl a
e on e-arts, c
- era r/
Refer to attached I.EHs or the failures listed in Table 1 ed LER Abstrace s)Ilours shooting tvery.ereteplace 6
3.33 7
0 This LER does not pertain to DC's.
8 88.25 9
28.43 CO2 fire protection system discharge.
DG's would have been operable under emergency conditions.
10 29.90 CO2 fire protection system discharge.
DG's would have been operable under emergency conditions.
11
.1 No 1.ER 21
.27 Cavitating jacket water pump.
DG would have been operable under emergency conditions.
22
.50 Minor lube oil leak. DG would have been operable under emergency conditions.
i e r.n.,
'e /
TAtlE 3 Diesel Cencrator Unscheduled Downt imie itecon d Plant Hono Cooper Calendar Yest 19_19 Unit No.
I e
LER Abstract E Duwntime llours e n s - H any time reported failures would not liave been a (Refer to attet failure under emergency conditions, please explain hese, a
u e-a e, e epa e
to a aclie 1.
s or flie hilures listed in Talah I.
ed LER Abstract s)Ilours slano t ing tvery,ey teplace 2
0 Tech Spec violation only.
3 28.17 Lube oil hose breik.
This DG would have been operable under emergency conditions.
4 231.28 2.0 229.28 5
.35 Silencer bypass solenoid failure. This DG could have been manually started under emergency conditior.s.
No LER 23 1.93 Minor lube oil leak. DG would have been operable under emergency conditions.
24 1.43 Breaker IAF improperly closed. DG would have been operable under emergency conditions.
25 1.73 Loss of electrical governor. DG would have been operable under emergency conditions.
26 1.00 Minor lube oil leak. DG would have been operable under emergency conditiens.
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a TAtl.E 3 islesal Cencrator Un:ctieiluted Downtinio itecord l*lunt Haine Cooper Calendzr Year 19 g Unit No.
1 LER Alistract N Downtime lloura
- ~
""Y
' #*E ' *
(Refer to attcl fa ure un er e m gency con us, please engilmin lies e, Ca Trouble-Param, Del Repatr/
Refer to attactical 111ta or time f ailures listed in Talele 1.
ed LElt Alistraci s)Ilours shooting tvern ey teplace 1
453.88 2.0 451.88 No LER 27 25.88
- 7 cylinder pressure relief valve inoperative. DG would have been g arable under emergency conditions.
28
.50 l
Terbocharger oil leak.
DG would have been operable under emergency conditions.
29
.58 011 leak on camshaft cc,ver. DG would have been operable under emergency conditions.
30 8.16 Turbocharger oil f11ter leak.
DG would have been operable under emergency conditions.
31 4.95 Fuel f11ter leak. DG would have been operable under emergency conditions.
32 5.95 Lube oil leak.
DG would have been operable under emergency conditions.
s e
et 1'
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Enclosure l
Page 1
TABLE 4 ONSITE EMERGENCY DIESEL GENERATOR AND Plant Name Cooper
. AUX 1LIARY EQUIPMENT MODIFICATION RECORD Unit No.
1 Equipment or Precedure Date of Reason for Hodification and Modified Mod.
Desired Improvement Description of Modification St rting Air 10-10-73 To facilitate calibration and check of Added root valves to each pressure
'R ceivers pressure switches associated with DG starting switch mounted on air accumulators.
(MDC.73-3)
_ air system.
DC' Speed Sensing.
3-2-74 Vendor's recommendation to improve diesel Replaced toothed wheel for the speed Device operation.
sensing relay.
(MDC-73-19)
Ginerator Field 3-17-74 To improve reliability of generator field Connected two NO contacts of relay K6
' Circuit flashing.
in parallel to assure generator field (MDC 74-28)'
flashing when diesel starts.
Turbochar'gerl011 4-30-75 Vendor's recommendation to prevent oil leak Added air operated valve in oil'line into air inlet manifold when DG is off, to the turbocharger. When DC is off, Line'.
this valve closes and prevents oil (MDC 74-94) accumulation in the inlet header.
DG' Control-10-22-74 To monitor number of DC starts.
Added nonresettable counter to diesel (MDC.74-127) generator panel.
DC's Control 11-2-76 To maintain seal in circuit for starting Replaced relay 14RY1 with time delay
-(MDC.75-55) relays to assure reliable diesel starts.
relay in the engine start circuit.
.DG's Fuel 011 System' 1-1-78 To improve operation of the fuel oil Replaced relay 4 FOX with a time delay (MDC 77-93) booster pump.
relay to prevent cycling of fuel oil booster pump during start.
DG's Control 6' 4-29-79.
To enhance monitoring of DG's control Added annunciators in the control room Monitoring circuits as requested by NRC letter dated f
to alarm abnormal conditions which
_ (MDC 78-26) -
April 18, 1978.
could prevent diesel start or initiate diesel shutdown.
DC's Annunciation &
5-22-79 To bypass alarm TURBO BEARING WEAR when Connected a NC contact of relay 14S2 in DC's Oil System diesel is not running (to eliminate parallel with the pressure switch 38TBW.
.(MDC_78-61)'
nuisance alarm).
Added a time delay relay to the control To assure operation of.the prepost lube oil circuit for the prepost lube oil pump pump while' diesel is coasting doen.
which will operate the pump for 30 sec.
after diesel trips. This will assure adequate oil pressure to the crankshaft during constdown.
Enclosure (4)
,Paga:
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TABLE 41 ONSITE EMERCENCY DIESEL CENERAffh AND Plant Hira Cooper
- s AUXILIARY EQUIPMENT. MODIFICATION RECORD Unit No.
1
- Equipment or -
Procedure Date of.
Kenson for Modification and
.. Modified' Mod.
Desired Improvement Description of Modification
~ LProtective Relaying
'5-25-80 To prevent overloading of diesel generators Added an overcurrent relay to each DC.
. for~ Cenerators when the ofisite power is lost while '2rting It detects DC overcurrent and trips
.(MDC 79-59)
DG's.
the breaker imtween essential and nonessential buses, il DG's Exhaust Bypass 6-10-80 To improve the reliability of DC's starting Modified the. diesel' generator silencer
- :(MDC 80-20)~
air system, bypass control circuit to assure adequate air pressure to the fuel racks during bypass opcration.
Cooling' Water System 6-6-80 To increase the reliability of the jacket Added a continuous vent line on the (MDC 80-69) water. system.
jacket water pump to prevent air vapor lock.
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