ML19350E259

LER 81-033/01T-0:on 810602,while Blowing Down HPCI Steam Supply Line,Auxiliary Oil Pump Tripped & Motor Was Found to Be Burned.Cause Unknown.Investigation Is Continuing to Determine Cause.Motor Rewound & Tested Satisfactorily

ML19350E259
Person / Time
Site:	Dresden
Issue date:	06/09/1981
From:	Zirwas K COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19350E257	List: ML19350E256 ML19350E259
References
LER-81-033-01T, LER-81-33-1T, NUDOCS 8106170211
Download: ML19350E259 (2)

Text

.__ _ _. _ _ . ._

nc egnes ass. - - - - - -- - -

u.s.nuCLaAn AE2utAroRY Commi$ssoN _._ .

I LICENSE 3E EVENT REPORT Q CONTROL 8 LOCK: l l l l I I@ (ptEAsE PRINT OR TYPt ALL REQUIRED INFORMATIONI l0 l 58 9l l Il Ll 7

D l R I ? !14 2 l@l 0 l0 l- l0UCENSE UCENSEE Coot 15 l0 l0 l0 l0 !- l0 l 0Eli @l 4 l 1UCENSE NUMBER 2S l 1 l1TYPE l 1JOl@l57 CAT l 54 l@ . . _

con T -

lolii 7 8 l'"'ILi@lol 80 51010DOCKET 41

!0 l21317 NUMOER GLOI 6 f EVENT 68 60 o 121 QATE a ll Gl0 l 61019 74 75 PEPoRT QATE is 1180l@ '

EVENT DESCRIPTION AND PRC8ABLE CONSEQUENCES h ,

ITTTI I While blowing down HPCI steam supply line with HPCI turbine on the turnine tear. the I

_ . _ = . _ = _ , _ . -. -- . . . .

~

l auxilliary oil pump tripped and the motor was fuuud iu be bruned

~

r.immu HPCI was decleie'd I i o # 4, l fnoperable and the required surveillances were begun. This event was of minimal safetyI j.go,,,lsignif n:E since all remaining ECCS systems were available. There was no effect on l l

I t o t e i l public health or safety. This was the first occurrence of this evee. I lo $ 7) l l t o is ? I I 1 8 .s 'O o C E SU C E COMPONENT CooE SUSGodE SU CE lo l 9 l' i Sl F l@ y@ l Al@ lM l0 lT l0 lR lX l@ l Z l@ W @

7 8 9 10 11 12 13 18 19 20 SEouGNTIAL CCCURRENCE REP <.RT REVISloN EVENT YEAR REPomT No. CooE TYPE No.

@ ;LER/Rosg I al 11 21 22 1-1 23 1013131 24 28 1/l 27 l 01 i l 28 25 i TI 20 l-l 31 101 32 EN IETYEE oEPU#IT **u E woVRs c2 ' #5s*EiTT!E S Pol *aS s. *'sUPP

• ' @EI' wANP7EERER . . .

[33 Aj@l34z l@ !35 Z l@ l34Zi@ l010101 l lY 43 l@ l42Yl@ l43NI@ lGiolsl0l@~

37 40 44 4 7--- -

CAUSE CESCRWTICM AND CORRECTIVE ACTICNS h

,, ,ag.) HPCI system control circuits related to the operation of this pump were tested with no l

,, , ,- ; labnormalties noted. The cause of the motor failure is unknown. Investigation is con- l

tinuing to determine the cause. The motor was rewound and tested satisfactorily. A l

,, ,,, g supplemental LER will be sent wiien the additional information is available. l li ia l I I 7 a 9 80 A  % POWER oTHER STATUS 1 RY otSCOVERY QESCRIPT1oM ii I51 d@ l 0l 41 6l@l" N/A l lAl@l Operator Observation l

' !nviTv A Cc'# TENT RELEASE tocATroN cP RELEASE @

lt i s l lZ l @o orRELEAsElZl@l AMouNTer N/A w AcT:virY l @l N/A l PERSONNEL EXPOS ES NUMSER TYPE OESCRIPTICN N/A l1 l 7 l l0 l0 l0 l@l Z l@l l PER$oNNEL INJURIES NUMSER CESCRIPT1oN li j a l l 0l 0 l 0 l@l N/A l 7 8 9 11 12 80 toss or om oAM ACE To PActuTY TYPE DESCMtPTicN N/A l__

lt131 7 s 9

] @l 10 80

'UGUCITY NRC USE CNLY

,}

iS$uto N

OESCRIPTioN l N/A l ll llllllll ll l$ 80 3 7

} g gj 68 69

. nA.us c.s PRssaa sR

• i"* 8 sunNs-942-2920 Ext. 422 g

ATTACHMENT TO LICENSEE EVUT' REPORT 81-33/01T-0

, COMMONWEALTH EDISON COMPANY (CWE)

DRESDEN UNIT #2 DOCKET 4 050-237 While blowing down HPCI steam supply line, with HPCI on the turning gear, the aux 111ary oil pump tripped and the motor was fcund to be burned. HPCI was' declared inoperable and the required surveillances were begun. This event was of minimal safety significance, since all remaining ECCS systems were avail-able. This is the first occurrence of this type. HPCI system control circuits related to the operation of this pump, were tested with no abnormalities noted.

The cause of the failura is unknown Investigation is continuing to de-termine the reason for the motor failure. The motor was rewound and tested satis-

' factor 11y. HPCI system was returned to service after repairs. A supplemental LER will be submitted when additional information is available.

i l

l l

l I

l o

a ge" W'

-..,,.-e,- . . . - - , ,. , , , ,-

, - - . - - , - - , - - - - ~----,.w - - - - - . - - w - e - -.- . ---- w-

---u- - - - - - e -- -m,- - -- w-,- - - -