ML19318C414

LER 80-036/03L-0:on 800528,during Performance of RHR Valves Inservice test,1A RHR Heat Exchanger Discharge Valve Failed to Stroke Close.Caused by Cap Screw Connecting Valve Actuator to Valve Shaft Coming Out.Cap Screw Replaced

ML19318C414
Person / Time
Site:	Farley
Issue date:	06/25/1980
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19318C411	List: ML19318C410 ML19318C414
References
LER-80-036-03L, LER-80-36-3L, NUDOCS 8007010446
Download: ML19318C414 (2)

Text

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REPORT D ATE EVENT DESCEPTION AND PROB ABLE CONSEQUENCES h lo t a; i At 2200 on 5-28-80, during the performance of FNP-1-STP-11.6 (Residual Heat Removal l lo la 4 i Valves Inservice Test), the 1A RHR Heat Exchanger discharge valve (FCV603A) failed tog g o i4 j l stroke close. It remained in the required open position. As a result of being l go,,g) unable to stroke the valve, it was declared inoperable. Tech. Spec. 3.5.2, in part,;

o 9; i requires the valve to be operable. Tech. Spec. 3.5.2 action statement requirements ;

l0l7ll were met. Health and safety of the public were not affected. l IOlai i I 7 6 3 80 DE CODE SUSC E COMPONENT CODE SLBC dE S E la191 7 8 l Cl Flh Wh l Z lh l Vl Al Ll Vl 0l Pl@ ]@ l Zl@

9 to 11 12 13 18 10 20 SEQUENTIAL OCCURRENCE REPORT REVISION

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[.__j 33 lol 32 KE AC OP O PL NT MEr HOURS S B i E FoR B. SUPPLIE MANUFAC RER I B IhWh Wh JJ 34 35 ISh 3d 'lll 0l 0l 0l 0l 40 yg 41 l Njg l Alg lR l3 l4 l 4[g 42 43 44 47 CAUSE DESC.41PTION AND CORRECTIVE ACTIONS li j o j i This event was caused by a cap screw connecting the valve actuator' to the valve shaf tl gl coming out. 'Ihe cap screw was replaced, the test successfully reperformed, and the j

,,,,,; valve was declared operable at 0950 on 5-29-80. The last STP was successfully  ;

,,,i l performed on 2-28-80. No cause could be determined for the cap screw coming out. g g; No maintenance had been performed that involved the cap screw since the plant was  ;

7 3 3 80 STA $  % POWER OTHER STATUS Dis RY OISCOVERY DESCRIPTION I t iS8 I lE lh l 1l 0 l 0 l@l NA l W@l Operator observation l 7 1 12 13 44 43 46 63 AELEA5EO OF RELE ASE AP'OL'NT OF ACTIVITY LOCATION OF RELEASE l' H '; 'I z l @' llj@l NA l l NA l

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS - LER 80-036/03L-0 initially placed into operation. The cap screws in similar valves were checked and found to be satisfactory. This incident in considered to be an tsolated occurrence.

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