ML20062F678

/03L-0 on 781112:reactor Steam Dome High Pressure Switch B32-PS-N018B Did Not Reset & Would Not Allow RHR Valve E11-F008 to Open for Shutdown Cooling at Reactor Pressure of 102psig.Caused by Sticking micro-switch

ML20062F678
Person / Time
Site:	Brunswick
Issue date:	12/13/1978
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:
Shared Package
ML20062F677	List: ML20062F672 ML20062F678
References
LER-78-074-03L-01, LER-78-74-3L-1, NUDOCS 7812200201
Download: ML20062F678 (1)

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EVENT DESCRIPTION AND PRO 8A8LE CONSEQUENCES O'o O 2 l Reactor steam dome high pressure switch B32-PS-h018B would not reset and l gl would not allow RHR valve Ell-F008 to open for shutdown cooling at a reactor l

, a 4 l pressure of 102 psig. I o 3 l (Technical Specification 3,3.2) l 0 6 l 1 i

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iTTa 1 1 I 7 '5 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUSCODE COMPONENT CODE SU8 CODE SU8 CODE

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38 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i o l A sticking micro-switch caused the instrument to fail. The instrument was l i .

i , i replaced with a new pressure switch from stock. Since this switch has no 1

, 7 l previous history of failure, this is considered an isolated incident and no  ;

l further corrective action is required. l i i 4 l l 7 8 9 . 80 SAN  % POWER OTHER STATUS ISC RY DISCOVERY DESCRIPTION i s [Gj@ l 0l 0 l0 l@l NA l J @l Valve inoperability l A TfVITY CO TENT- '

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