ML19207C214

LER 79-025/03X-0:on 790806,during Steady State Operation at 45% Thermal Power,Emergency Diesel Generator a Found in Degraded Mode, & B Engine Also Declutched.Caused by Relay Failure Due to Normal End of Life.Relay Replaced

ML19207C214
Person / Time
Site:	Fort Saint Vrain
Issue date:	08/31/1979
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19207C215	List: ML19207C214
References
LER-79-025-03X, LER-79-25-3X, NUDOCS 7909100481
Download: ML19207C214 (1)

Text

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) o i 8 9 lc l0 F S l V l 114 l@l 0 l 0 l- l 0 LICENSE 1S l0 l0 NUMBER 0 l0 l- l 0l 0l@l 4LICENSE 25 26 1lll2l0l@l TYPE J0 l 57 CAT 58 l@ 7 LICENSEE COGE CON'T o i sy,] l L @l 0 l 5 l 010 l0 l 2 l 6 l76d @l 0 l8 6W l0 l617 19 j@] 0]REPORT EVENT D ATE 74 75 81 3l ll 7l 9l@ DATE 80 7 8 60 61 DOCK ET NUMBER EVENT DESCRIPTION AND PROBABLE CONSEOUENCES h o 2 l On Augus t 6,1979 durine stendv state operations at 45% thermal power and 145 MW o 3 1 electrical power, "A" emergency diesel generator was found in a degraded mode per Fort Vrain Technical Specification LCO 4.6.1. This is reportable per Fort St. Vrain l o 4 I S t. 0g. l Technical Specification AC 7.5.2(b)2. When "A" diesel engine declutched "B" diesel l 0 is l engine also declutched. Redundant equipment was operable and available. There was l 0 7 lno af fect on public health or safety. l 0 8 7 8 9 COMP. SYSTEM CAUSE CAUSE VALVE CCCE CODE SU8 CODE COMPONENT CODE SU8 CODE SUSCODE 7 O 9 8 IE ID l h lE lh dh I Di El7 i AlV!XI@ l lh dh 9 10 11 12 13 18 19 2u SE QU E NTI A L OCCU R R E N CE REPORT REVIS:ON _ EVENT YE AR REPORT NO. CCOE TYPE NO. LE

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34 05 3 40 42 43 64 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS ii o lA relav f ailed due to normal end o f life. The unit had been tested satisfactorily I i i Ithe orevious month. The relav was replaced and tested and the surveillance succern- 1 1 2 i fully completed. I I i a l 1 4 l

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8 3 30 STA S  % POWER OTHE R STA TUS SO RY DISCOVERY 0ESCRIPTION

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