ML19341A726

LER 80-050/03L-0:on 801216,during Surveillance Testing of RHR Motor Operated valves,RHR-MO-25B,loop B Injection Line Inboard Isolation Would Not Open.Caused by Installation Error.Close Torque Switch Was Readjusted

ML19341A726
Person / Time
Site:	Cooper
Issue date:	01/14/1981
From:	Doan P NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19341A724	List: ML19341A723 ML19341A726
References
LER-80-050-03L, LER-80-50-3L, NUDOCS 8101270784
Download: ML19341A726 (1)

Text

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, NRC FORM 366 U. S. NUCLE AR REGUL ATORY COMMISSION (747) e LICENSEE EVENT REPORT

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75 1 d 60 til ;C;.K ET NyVBER t.3 t>9 Eb ENT DATE 14 REPORT O ATE EVENT DESCRIPitCN AND PRCS ABi '. CC?,SECUENCES h l a ! 1 lDuring surveillance te , ting of RHR motor operated valves RHR-M0-25B, the loop "3" J

[a14!linjection line inboard isolation would not open. The "A" loop was operabJe as well l i , i .i ; jas both diesel generators. The subj ect val"a is normally closed and is required to l Inisi lopen for LPCI injection. There were no adverse affects to the public health and l s . .; j ;sa fe ty . (RTS 3.5.A) l

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JJ 34 45 A. J/ 40 di 42 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACilONS h 1il0l] Valve is 24" 900#, Anchor / Darling gate valve. Closing toraue switch set too close l 1: Iij leo manufacturer's recommended settine which caused valva disk to stick in seat. Val-f fz 1,Ilve manually opened. Close torcue switch adjusted to lower setting identical to "A" 1 Ii11111oon isointion valve. Valve then satisfactorily tested. Evaluation beine performed I til4I l& updated LER will be submitted if determined hydraulic lock could exist. l, 7 a 3 so STA , POWER OTHER ST ATU$ is O HY DISCOVERY DESCRIPTION liisllE]@ l0l9l8[@l" NA l lBl@l** Operator Observation l

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%4E OF PREPARER Paul F. Doan PHONE: 402-825-3811 2 81 012701gg