ML19294B477

LER 80-004/03L-0:on 800115,during Normal Operation, Discovered That RHR Valve M018 Was Inoperable.Caused by Failure of GE Relay Coil,Blowing Valve Control Circuit Fuse. Relay Coil Was Replaced & Correct Operation Verified

ML19294B477
Person / Time
Site:	Cooper
Issue date:	02/08/1980
From:	Bednar L NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19294B476	List: ML19294B475 ML19294B477
References
LER-80-004-03L, LER-80-4-3L, NUDOCS 8002280479
Download: ML19294B477 (1)

Text

NRC FORM 366 U. S. NUCLE AR REGUL AToRY CoMMISStoN s7 77)

LICENSEE EVENT REPORT ccNT90tstoC< l l  !  ! l l ]O (PLEASE PAINT oR TYPE ALL REcutREo lNFoRMATioN) o11 l Ni EloctwEe Cl PlmEPJ 11a @ s d 3- O I 01 0 oca ,a Nae 01 -l 0l ri dgl 4 l ll 1 il1l@lu 2s o ocEN a n ,e ao au @

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4 M l L!@ 01 Sl0! 01 01 21 91 8@l0Il1115lelOl@l0 W c1 got w E ! N;,,vg g r.e M o s v ENT DATE '4 3 2HEPORT 10 I DATE 8 19 10n0 @

event oesCRiprico Ano Pnos AeLE C;*.SECLENCE: h

, !; lDuring normal operation an operator noticed that the ;;reen indicating light fo r  ;

, , , ,RHR valve M018 was not lit. The control power for the valve was lost and made the ,

.4 ,  ; valve inoperable (Tech. Spec. Section 3.7.D.2). The valve was on the closed posi- )

oI>i leion as required for power opera:icn. The normal RHR suction valves were open. l a in Ithus, the RHR system would have been available if needed. This event had no adversq oI'lleffect uoan public health and safety. l L:1: J i I 7 8 3 SYSTEM CAvst C AL ,E COUP wALVE CCCE .CDE W8C CE CCVPCNENT CODE SUSCCDE SudCODE o 9 s

I c l Fl@ LIJG Lil@ l Rl El Ll Al Yl M@ l Al@ W @

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_ 3E:AEN T' AL Qu /4 M NLC REFORT REVISION gq 99 E% ENT YE AN HEPORT No CDE TYPE N o.

@ . _glg I 81 01 -l I 01 01 al I/l lo13I I t. I l-l loi 2I 22 23 24 46 27 23 ;9 Ju JI 31 ACTION suTUAE EF8ECT SHurOOWN A TT ACHME N T NPRO 4 PAIVE CCVP COYPCNENT TAKEN ACTION oN PLANT YETHOD HOURS " SLBViTTED FoAubOS SL PP LI E R MANUFACTURER LA_J@ ,4ZI@ Lz_J@ Lz_J@ 1010101 01 W@ l@ Nl@ lGIOl8l0l@

33 33 J6 3 '. 40 43 42 43 44 47 CAUSE oESCRIPTION AND CORRECTIVE ACTIONS h i o The coil of a General Electric Model CR120 relay (#16A-K31) failed and blew the valg ii)ij lve control circuit fuse. The relay coil was replaced with an identical spare and coy-

, Irect operation of the relay was verified. This was the first failure of this type o!p-i i l served at CNS. During subsequent discussions with the vendor, it was determined that i A Ithe coil failure was of a random nature and was not indicative of a generic problem)

' f ' 80 F AOLity ME THOD OF STATUS mPOWER OTHER STATUS DISCOV E H Y O'SCOVERY DESCRIPTION FFl W@ l 01918l@l" NA l lAl@l*

Operator Observation l A21,virY C$ TENT 8

afteAsED OF aELE ASE AMOUNT oF ACTIVITY @ LOCATION OF RELs ASE i c I zl @ LZj@l NA I NA I 4 , iO t1 44 45 80 PERSONNEL F nPOSLRES

, net E R TYPE C E SC PIP TION IiI7i 10 01 Ol@l zl@l H 9 12 11 N l ii 80 PE RSONNE L 'NJU A6 ES Nuv9E n DE SCRIPTION 4

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,,,,,,,,,, ,g 80 5 Ladislav F. Bednar 402-825-3811 o NAVE OF PREPARER PHON E : $