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

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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

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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.

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32 EFFECT SMUTOOWN ATT AC HM E NT N P R D-4 PRIME COMP. COMPON EN T ACTION FUTURE MANUFACTURER TAKEN ACTION ON PLANT METHOO HOURS SUSMITTED FORM bu8. SUPPLI E R lA l@l ZI@ IZ l@ lM ZI@ l01010101 I Yl@

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

• s l E l@ l 01 4 l Sl@ N/A l lB l@l Routine Surveillance Test l ACTIVITY CO TENT RELEASED CF RELEASE AMOUNT OF ACTivtTY LOCATION OF RELEASE t o l Z l @ l10Zl@l N/A l N/A '

7 t1 9 11 44 4S 80 PERSONNEL EXPOSURES NU*AB E R TYPE D ESC RIPTION l

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' a 9 11 12 13 PE RSONNE L ;NJUR'ES NLVSER OESCRIPTICN

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a 8 9 1010 l 0 I@l12N/A 11 80 LOSS OF QR DAM AGE TO F ACILITY g, g sle

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NAME OS PREPARER

[g(( - J. W. Gahm PHCNE:

(303) 785-2253 j

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