05000324/LER-1980-080-03, Stuck Reactor Instrument Penetration Isolation Valve X76-B Made Containment Atmospheric Control Monitors 1259,1260 & 1261 Inoperable. Caused by Bakelite Nipple Broken Off Actuation Switch

Stuck Reactor Instrument Penetration Isolation Valve X76-B Made Containment Atmospheric Control Monitors 1259,1260 & 1261 Inoperable. Caused by Bakelite Nipple Broken Off Actuation Switch

ML19341A823
Person / Time
Site:	Brunswick
Issue date:	01/20/1981
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19341A821	List: 05000324/LER-1980-080, Forwards Updated LER 80-080/03L-1 05000324/LER-1980-080-03, Stuck Reactor Instrument Penetration Isolation Valve X76-B Made Containment Atmospheric Control Monitors 1259,1260 & 1261 Inoperable. Caused by Bakelite Nipple Broken Off Actuation Switch
References
LER-80-080-03L, LER-80-80-3L, NUDOCS 8101280282
Download: ML19341A823 (1)

LER-1980-080, Stuck Reactor Instrument Penetration Isolation Valve X76-B Made Containment Atmospheric Control Monitors 1259,1260 & 1261 Inoperable. Caused by Bakelite Nipple Broken Off Actuation Switch

Event date:
Report date:
3241980080R03 - NRC Website

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LICENSEE EVENT REPORT Previous Report Date 11-17-80

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8 60 68 DOCK ET NUM8ER 68 63 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PRO 8ABLE CONSEQUENCES h O 2 l During the performance of Containment Atmosphere Monitorine System Connonent Test I

l PT 24.2, the reactor instrument penetration (RIP) isolation valve X76-B. would not "1

o 3 ITTTl I reopen which made the containment atmospheric control (CAC) monitors 1259. 1260. and I g l 1261 inoperable due to loss of sample flow through the penetration. This event did l

not affect the health or safety of the public.

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33 34 3h 36 33 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h ligoll The actuation switch, manufactured by Master Specialties, was found to have its bake-l i,,ij l lite nipple broken off, which prevented the switch actuation plunger from resettine f

g l the switch contacts after the valve was closed. The entire switch module was replacedt i,;3g l and the valve was successfully cycled. This is considered an isolated event with no I i 4

further action required.

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NAME OF PREPARER