ML17326A536

LER 80-003/03L-0:on 800124,during Surveillance Test,Turbine Driven Auxiliary Feed Pump Trip & Throttle Valve Unlatched. Caused by Burned Up Reset Coil on Trip & Throttle Valve Linkage.Linkage Not Engaging Due to Worn Mating Surfaces

ML17326A536
Person / Time
Site:	Cook
Issue date:	02/22/1980
From:	Wizner D INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17326A535	List: ML17326A534 ML17326A536
References
LER-80-003-03L, LER-80-3-3L, NUDOCS 8003030399
Download: ML17326A536 (3)

Text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISS ION I7-77)

LICENSEE EVENT REPORT h

CONTROL BLOCK: Qi (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

~01 7 8 9 M I D C I.ICENSEE CODE C

I 2

14 QE 15 0 0 0 6

0 0 0 LICENSE NUMBER 0 0 0 25 Qs 26 4 I I I I LICENSE TYPE 30 04~57 CAT 58 Qs CON'T 7 8 soURcE ~LO 60 61 0 5 0 0 0 DOCKET NUMBER 3 1 6 68 0 69 EVENT DATE 0

74 QB 75 0 2 2 2 REPORT DATE 8 0 80 Q9 EVENT DESCRIPTION AND PROBABI.E CONSEQUENCES Q10 DURING SURVEILLANCE TEST, THE TURBINE DRIVEN AUX. FEED PUMP TRIP AND THROTTLE VALVE BECAME UNLATCHED FOR NO APPARENT REASON. AFTER RESETTING,

~03 THE UNIT WAS TESTED AND,PERFORMED PROPERLY ON TWO ATTEMPTS. LATER THE SAME DAYp THE UNIT FAILED TO START AS REQUIRED ON A LOW S/G LEVEL SIGNAL

~OS DURING A REACTOR TRIP CAUSED BY A LOSS OF CONDENSER VACUUM. THE UNIT WAS

~OB

~O7 DECLARED INOPERABLE AGAIN PER T.S. 3.7.1.2. THE ACTION REQUIREMENTS WERE MET. S/G LEVEL WAS RESTORED USING THE MOTOR DRIVEN AUX. FEED PUMPS.

~OB 80 7 8

'1 SYSTEM CAUSE CAUSE COMP VALVE 7 8

~cH 9

CODE 10 Q11 CODE 11 E Q12 SUBCODE

~8012 12 13 COMPONENT CODE 18 SUBCODE

~079 19

~

SUBCODE 20 0"

SEQUENTIAL OCCURRENCE REPORT REVISION Q17 LERIRP REPORT ACTION FUTURE EVENT YEAR

~80 21 22 EFFECT

~

23 SHUTDOWN

~PP 24 REPORT NO.

26 27 28 ATTACHMENT CODE 29 NPRDQ TYPE 30 PRIME COMP.

31 32 COMPONENT TAKEN ACTION

~A019 ~A019 33 34 ON PLANT

~029 35 METHOD

~zQ 36 3/

0 HOURS Q22 0

40

~ 0" SUBMITTED 41 FORM SUB.

~024 42 SUPPLIER

~029 43 44 MANUFACTURER T I 4 I 47 029 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 THE CAUSE OF THE FAILURES WAS A BURNED UP RESET COIL (SCHJTTE G KOERTING, o

DWG. 69-XC-113'TEM 6) ON THE TRIP AND THROTTLE VALVE LINKAGE. THE COIL HAD SHORTED TO ITS COVER. ALSO, THE LINKAGE (SCHUTTE 8 KOERTING, DWG.

69-XC-113, ITEMS 23 AND 27) WAS NOT ENGAGING PROPERLY DUE TO WEAR OF, TWO MATING SURFACES. THE RESET COIL WAS REPLACED AND THE WORN SURFACES WERE 80 7

9 8 9 FACILITY STATUS

~X029 ~04

'4 POWER 8 Q29 OTHER STATUS DURING REACTOR T

~

~3P METHOD OF DISCOVERY IR ~A027 FAILURE TO START DISCOVERY DESCRIPTION Q32 8 9 10 12 13 44 45 46 80 7

ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITY Q N/A LOCATION OF RELEASE Q Z Q33 ~ZQ34 N/A 8 9 10 11 44 45 80 7

PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION ~39

~00 0 Q27 ~Z029 N/A 80 7 8 9 11 12 13 PERSONNEL INJURIES NUMBER DESCRIPTIONQ41 7

s 8

~00 9

O Q49 11 12 N/A 80 7

9 8

LOSS OF OR DAMAGE,TO FACILITY TYPE

~z04, 9

DESCRIPTION 10 43 eA S.oo 303 f 80 NRC USE ONLY uNQ<<N/A PUBLICITY ISSUED DESCRIPTION ~S OE O

O '2 10 68 69, 80 Es 7 8 9 DAVID G. WIZNER 0 NAME OF PREPARER PHONE. 616-465-5901

V ~

'R

SUPPLEMENT TO LER 580-003/03L-0 SUPPLEMENT TO EVENT DESCRIPTION PUBLIC HEALTH AND SAFETY WERE NOT JEOPARDIZED.

SUPPLEMENT TO CAUSE DESCRIPTION SMOOTHED AND FLATTENED TO PROVIDE POSITIVE ENGAGEMENT. A NEW COIL COVER WHICH WILL PROVIDE LARGER CLEARANCE IS BEING FABRICATED.

ARRANGEMENTS- ARE BEING MADE FOR A MANUFACTURER SERVICE REPRESEN-TATIVE TO AID IN INSPECTION AND POSSIBLE REPLACEMENT OF THE LINKAGE.