ML20009E701

LER 81-035/03L-0:on 810511,w/plant at 70% Thermal Power During a Diesel Generator Set Surveillance Test,B Engine Tripped & Declutched.Caused by Failed Exhaust Temp Switch. Switch Repaired.Test Completed.Generator Returned to Svc

ML20009E701
Person / Time
Site:	Fort Saint Vrain
Issue date:	06/10/1981
From:	Gehm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20009E687	List: ML20009E686 ML20009E701
References
LER-81-035-03L, LER-81-35-3L, NUDOCS 8107280370
Download: ML20009E701 (1)

Text

U. S. NUCLE AI) RE2ULATORY COMMISSION NRClIOdty 8777#

LICENSEE EVENT REPORT CONTROL BLOCK: l i

l l l l l Ih (PLEASE PRINT OR TWE ALL REQUIRED INFORMATIONI l l@

I 101i1 7 8 9 l C lLICENSEE 0 l F CODEi s l v i l l@l 14 tS 010 l- 1010101010 LICENSE NuMSER l- 1010 25l@l4 26 11LaCENSE 11 12 TYPE 10JG l @

STGAT68 CON'T lelil ,a[,j" l L @l 0 l 510 l 0 l0 l216 l 7t:8@l015 "E

69 11 11 18 11 @[0_l611101811 EVENT CATE 74 74 REPORTDATE 80 l@

7 8 60 St OOCKET NUY8tlR EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h

• I o i 2 I l On May 11. 1981, with the olant ooeratine at 70': thermal never and 2 30 MJe . durino l 10131 I normal surveillance testing on " A" diesel generator set , f ailure of the tempe rature l

[Ol. 1 I switch for "B" engine exhaust manifold resulted in a trip and declutch of "B" engine. l l

l 0 I s I l Degraded .aode of LCO 4. 6. l(d). Reportable per Fort St. Vrain Technical Specification l l0(6l l AC 7. 5. 2(b)2. No accompanving occurrence. No effect on public health or s'afety. 1

[ O l 7 ] l Redundant equipment available and operable. Similar occurrences RO 79-20. A0 76-16. [

I 10181 1 80 E CODE SLBCO E COMPONENT CODE SLS COE S E 10191 l E l o l@ tr J@ LEj h l T l Nl g l T l a l n l@ Ls J@ L2J 18 19 20 7 8 9 10 11 12 13 OCCURRENCE REPORT R EVISION SEQUENTIAL EVENT YEAR REPORT NO. CODE TYPE No.

LER RO

@ s,E@R l 8l 11 l-l 23 l 0l 3l Sl 24 26

[d 27 lol3i 28 29 LtJ 30 l-J 31 LaJ 32

_ 21 22 ON NT ME WOURS S t POR 8. SUPPLI MANUPACTURER K N AC 0 la.J@L2J@ Laj@ !2J@ l ol 01 of of (LJ@ LxJ@ LnJ@ l ti 118 i Sl@ 47 JJ 34 36 6 31 40 el 42 43 44 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h I i 101 l A failed exhaust temperature switch caused "B" encine to trio and declutch durine sur- 1 I i l i i l veillance testing. The faulty switch was reolaced. the Surveillance Test enmlared- 1 iii2l l and the diesel generator returned to service. The switch is a LFE model No. 232-IRM. I I

lil3l l Failure was due to normal wear.

l lit 4lI 80 7 8 9

% POWER OTHER STATUS Dis O Y DISCOVERY DESCRIPTION STA Ii15I [,,E,,,,j h l Ol 7l Oj h l N/A I [,D,jhl Personnel Observation )

ACTIVITY CO TENT aELEASEO OPRELEASE LOCATION OP RELEASE h @l N/A AMOUNTOF ACTivtTY l N/A @l l l1 l61 PET SONNEL EXPOS ES NUveER TYPE li 171 l 01010 l@l Z "lhlOESCRiPTiONh N/A l

PERSONNE t iN;U7iES NUVSER DESCRIPTION N/A l li la 8l 9101010 l@l 7 11 12 30 LOSS OP OR DAMAGE TO PACluTY Q TYPE DESCRIPTION g,/

I li l918 9LIJ@l10 7

N/A 80 g ISSUEl @OE N/A CRIPTION l 88 lllllllllllll{

5' 8 5 0107200370 910610 PDR ADOCK 05000267

.p pgang (303) 785-2224 2 S PDR -

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