05000267/LER-1980-064-03, /03L-0:on 801103,diesel Engine 1B on Diesel Generator 1A Found to Have Inoperable Exhaust Temp Trip Circuit.Caused by Faulty Exhaust Temp Thermcouple. Thermocouple Replaced

/03L-0:on 801103,diesel Engine 1B on Diesel Generator 1A Found to Have Inoperable Exhaust Temp Trip Circuit.Caused by Faulty Exhaust Temp Thermcouple. Thermocouple Replaced

ML19345C522
Person / Time
Site:	Fort Saint Vrain
Issue date:	11/26/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19345C514	List: 05000267/LER-1980-064, Forwards LER 80-064/03L-0 05000267/LER-1980-064-03, /03L-0:on 801103,diesel Engine 1B on Diesel Generator 1A Found to Have Inoperable Exhaust Temp Trip Circuit.Caused by Faulty Exhaust Temp Thermcouple. Thermocouple Replaced
References
LER-80-064-03L, LER-80-64-3L, NUDOCS 8012050419
Download: ML19345C522 (1)

LER-1980-064, /03L-0:on 801103,diesel Engine 1B on Diesel Generator 1A Found to Have Inoperable Exhaust Temp Trip Circuit.Caused by Faulty Exhaust Temp Thermcouple. Thermocouple Replaced

Event date:
Report date:
2671980064R03 - NRC Website

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3 60 61 OOCKET NuvBER M 69 EV ENT OATE 74 75 REPORT CATE S0 EVENT DESCRIPTION AND PROBASLE CONSEQUENCES h l o : t l 1B diesel engine on lA diesel generator set was f ound to have an inoperable exhuast I ~ lo !3I I tenperature trip circuit. This would have prevented the automatic trip and declutch j io;,,,l circuit from tripping this engine if it failed to start and could have made the l l o 161 1 diesel generator set inoperable. This is interpreted as a denraded mode of LCO 4.6.1(p) t o !s 1 1 and is reportable per Fort St. Vrain Technical Specification AC 7.5.2(b)2. No affect l l3,7j lon public health or safety. 13 diesel generator unit was operable and available. Re- ,,,,, ; laced Occurrences are A0 75-03, 76-16, and RO 79-20. [ SYSTEM

CAUSE

CAUSE COMP VALVE COCE CCCE SUSCCCE CCMPCNENT COCE Sv8 CODE SUSCOCE 12691 l E l o l@ lE l@ lE lh l Il NI Sl Tl Rl Ulh i Elh l Z lh 7 4 9-10 11 12 13 18 19 10 SE OLENTI AL CCOURRENCE REPORT R EVISIC N REPORT *40. COCE TYPE N O. l VENT YE AR l-l l0 16 l4 l l/l l 0l 3l lLl l-l l0 l g g oO E @ as,g 8 [0 l _ 21 22 23 24 26 27 23 29 JJ 31 32 TAK N ACT ON CN PL NT A wCUR$ $$ TT O PC 8 SLPPL MANt FAC RER l A l@lr !@ I z l@ l zl@ 10 to 1010 I LvJ@ l Ni@ l NI@. Ic is 11 is l@ 22 34 35 J6 31 40 41 42 43 4A 47 CAUSE DESCRl8 TION AND CORRECTIVE ACTIONS } i j a j l Failure of the exhaust temperature trio circuit was due to a faultv.axhaust temoer-I i-{il lature thermocouple. The thermocouple develooed a hi2h resistance which caused the f ,,,, texhaust temperature indicating switch to indicate a high temperature. The thermo-t i,,3i j couple was replaced. Make: Conax Models 2 1/2" LG No. J-INC 256-T8 l ['14l l l 8 3 So I SA % power QTWER STATUS 315 O RY CISCOVERY OESCMtPTION li is t i E l@ 10 i s 10 l@l N/A l is l@l surveillance Temt i 8 AsiviTv C 'a .Eu65ta C,C TENT iucuNT c, ACTiviTv @ I taCATION c, uuASE @ RE u ASE liisI I 21 @ (zj @ l N/A I N/A i 5 9 to it 44 45 go P1RSCNNEL EXPCSLRES NUMBER TYPE CESCRiPT1CN =. l li I 71 101010 l@l z l@l N/A PERScNNE't%u' RIES cESCniPTiCN@ NuusER li til 10 ! 0101@l N/A I r aa si 12 so LOSS OF OR CAVAGE TO FACIUTY 1 TYPE CESCPIPTION li191 1 zl@ l N/A l 4 9 10 do PU S L t CITY 3pgggggq(y %, i$s't @ f "cl Tl' ~ 8012 0 5 o WP i,,i,,,,,,ii i

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