ML19345C522

LER 80-064/03L-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

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: ML19345C513 ML19345C522
References
LER-80-064-03L, LER-80-64-3L, NUDOCS 8012050419
Download: ML19345C522 (1)

Text

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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-

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         } 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

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