ML19254E270

LER 79-076/03L-0:on 791002,valve E11-F068B Failed to Open. Caused by Contacts Sticking in Relay Ri in Position Modulator,Resulting in Constant Close Signal.Relay Freed & Replacement Ordered

ML19254E270
Person / Time
Site:	Brunswick
Issue date:	10/23/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19254E265	List: ML19254E264 ML19254E270
References
LER-79-076-03L-01, LER-79-76-3L-1, NUDOCS 7910310402
Download: ML19254E270 (1)

Text

NRC FORM 366 t o ..ou t i.H ri L w)Li. i . wo ao .

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LICENSEE EVENT REPORT CONTROL BLOCK: l I

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1 8 9 LICENSEE CODE 14 15 LICENSE NUMBE R CON'T lolil  %"RM l tl@n, ! s lo l- o 3 12 ls 68l@ll63 t o 10 2 17 19 l@ l 10 REPORT EVENT DATE 14 75 2

3DATE 17 1980l@

7 8 60 61 DOCKET NUVBER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o 2 While attempting to establish RHR service water flow for an engineering evaluation, thq o 3 l operator could not get the E11-Fo68B valve to open. This is the RHR Service Water floy o 4 l control valve for the "B" loop subsystem. l o s Technical Specifications 3.7.1.1, 6.9.1.9b l 0 6 l l o 7 l W Hj l l 80 7 8 9 SYST E M CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SU8 CODE SUBCODE 7

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_ 21 22 23 2/ 30 31 ACTION FUTURE EFFECT SHUTDOWN . ATTACHMENT NPRD-4 PRIM E CO'.1P, COR.1PON E N T TAKEN ACTION ON PL ANT YETHOD HOURS - SUBMITTED FORM SUti. SU PP LI E H MANUFACTUREH 33 n l@l34A l@ JS Zl@ l Zl@

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0lg 47 42 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i o l An investication showed that relav RT in the position modulator had contacts sticking,l li li i causine the valve to see a cons tant "close" signal. As the relay is a sealed unit, the i 2 l contacts were freed by tapoing the relav body by hand. A replacement relay has been i 3 l placed on order. This is considered an isolated event, however, relay operation will l i 4 l be monitored to ensure its proper operation until replacement.

7 8 9 80 F ACILITY -

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