ML19296D415

Supplemental LER 79-030/03L-1:on 791228,while Performing Surveillance Procedures Qos 30-2,RHR Svc Water Vault Bed Plate Drain Check & Bed Plate Drain Valve AO 2-4999-59 Failed to Close.Caused by Component Failure.Valve Rebuilt

ML19296D415
Person / Time
Site:	Quad Cities
Issue date:	02/19/1980
From:	Hannum D COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19296D412	List: ML19296D411 ML19296D415
References
LER-79-030-03L, LER-79-30-3L, NUDOCS 8003040554
Download: ML19296D415 (1)

Text

NRC FORM 366 U. S. NUCLE AR REGULATORY COMMISSloN (7 771 Update Report--

Previous Report Date LICENSEE EVENT REPORT January 21 CONTROL BLdCK:1930 l l ll l l (PLEASE PRINT OR TYPE ALL REQUIRED iNFORMATION) 6 0 i 8 9 ll lLlQ A l0 l2 l@l0 IO l0 l- 14 15 lLIL0F.NSE l 0 NLVdER l 0 l - l 0 l 0 l 0*$ l@l26 4 lLICENSE 1 l1 l1 l1 l@lb i L Al I edl@

TYPE JO 7 LICENSEE C00E CON'T o i IO g5O" R' " l L l@l0 l 5 l 0 l 0 l 0 l 2 l 6 l 5 @l 1 l 2 l 2 l 8 l 79 )@l0 l 2 l1 l9 18 l0 l@

69 14 7b REPCRT QATE t!0 I 8 60 61 OGCKET NLV8ER tA EV ENT DATE EVENT DESCRIPTION AND PROSABLE CONSEOuENCES h o 2 ! While performina surveillance procedure Q05 30-2: RHR Service Water Vault Bed Plate l 0 3 l Drain Check. bed plate drain valve A0 2-4999-59 failed to close when its float switch]

O 4 was activated, as required by Technical Specification 3.5.H. A check valve, in l 0 s addition to each air operated valve, is installed in each bed plate drain line and l 0 6 l would prevent any back-flow from outside the vaults or from one vault to another in g Ol7 [, the event of a flood. The other bed plate drain valves were tested to be satisfactory.

o a i I 7 8 9 80 SYSTEY CAUSE CAUSE COVP. VALVE CODE CODE SUSCODE COMPONENT CODE SL 8 CO C E . SUSCCOE O 9 l e l a l@ Ld@ Laj @

10 v l A lL IV lE lX lh l El@ W @ 20 F d 9 11 12 13 Id 19 SEOUE NTI AL CCCURRENCE REPCRT REVISION LE R RO EVENT YEAR R E PORT NO. COOE TYPE NO.

@ ,ag43 17l ol -l I013 01 24 26 1/l 10 l3 l 29 lLl 30

[] l 1l 32 1 22 23 27 28 31 TAK r ACT ON CN PLA T TH HOURS S B ITT D FOR 8. SLPPL E VANUFACT AER l33D l@l4Z l@ l Zi@

35

_ Z l@ 3 l0l0l0l0l lNl@

41 lY]g lNlg lF l1 l2 l8 lg A 40 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS The cause of this occurrence was component failure. The internal return spring in  ;

i o l i i i the valve operator was corroded and prevented proper valve operation. The valve  ;

operator was rebuilt in accordance with the valve manufacturer's instruction manual  ;

, 3 and satisfactorily retested on January 25, 1980. l t 4 I l 7 8 9 80 F ACILITY METHOOOF STATUS  % POWER OTHER $TATUS DISCOV E R Y DISQ V RY DES iPT C.N Routine Surves ance t s l H @ ' l 0l 0l0lgl ' "

NA l lB[gl e s't i n ACTIVI TY CO TENT REu ASEO OP Eu ASE i 6 IZ;g lZlg - OUN1 0,4CTivifv @ ll LQCATION OF REdASE @ l 7 8 9 10 ft 44 45 80 PERSO*.NEL E K POSUR ES NOV8E R 1 7 l0 0 l 0 lhl TYPE Zl @l DESCRIPTION NA l

' * ' ,EnSONNEl',NJES *o NUveER DESCR,,T.ON@

NA l li l 4 81 91 01 01 Ol@l12 7 11 80 L OSS OP OR DAUAJE TO FACIL-TY Q TYPE C E SC RIP TION  %./

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N AYE oF PREPAREn

. annum 0 0 00 0 40 E 5 $ PHONE-