ML19260D641

LER 80-001/03L-0:on 800104,high Pressure Safety Injection Loop 12A Stop Would Not Move to Throttled Position.Caused by Loose Termination on One Electrical Lead Terminating at Valve Torque Switch.Terminal Screw Tightened

ML19260D641
Person / Time
Site:	Calvert Cliffs
Issue date:	01/31/1980
From:	Bauer E, Heibel R BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19260D636	List: ML19260D634 ML19260D641
References
LER-80-001-03L, LER-80-1-3L, NUDOCS 8002110534
Download: ML19260D641 (2)

Text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION (7 77) g ,

LICENSEE EVENT REPORT control block: l 1

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(PLEASE PRINT oR TYPE ALL REQUIRED INFORMATioN) 7 o i 4 3 ulnleir!ulil@l010 -10101010101-10101@l4111111111@l

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"U cur Ll@ 01Sl0101013l117 l@l n l i l n l a l p l n @l n l i l a l i l A l n l@ 74 IS REPORT DATE 80 7 8 60 61 OOCK ET NuveER bd 69 EVENT CATE EVENT DESCRIPTION AN) pro 8 ABLE CONSEQUENCES h o 2 1 At 1200 on January 4,1960, it was discovered that 12A high oressure I o a i safety injection 1000 stop would not move to its throttled position. I o .i i The high oressure safety injection auxiliary header remained operable l o s I throuchout this event. The high pressure safety in%-tion loop stoo I o s I was placed back into service at 1600 on January 4,1980, This is not i o 7 I a repetitive occurrence (T.S. 6.9.1.9). I o a 1 0 E CCOE SU CO E COMPONENT CODE SUS C0 0'E SU E o 9 IS lF l@ [Xj@ dl@ l V I A l L l V 10 i P l@

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43 44 47 CAUSE oESCRIPT1oN AND CORRECTIVE ACTloNS i o l The above valve was found to be ocening acoroximately 5*. of its full travel; I i i  ! investigation revealed a loose termination (high resistance) on one of the I m l electrical leads teminating at the valve's toroue switch. The terminal l

, 3 i screw was tightened and the valve operator worked satisfactorily. l i 4 I I 7 8 3 80 C " '

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NAME CF PAEPARER R. P. Heibe M . R. Bauer pgang.(301)269 4743/4728 2,

LER NO. 80-01/3L DOCKET NO. 50-317 .

EVENT DATE 1/4/80 REPORT DATE 1/31/80 A TTACHMENT CAUSE DESCRIPTION AND CORRECTIVE ACTIONS: (CONTINUED)

It is felt that the terminal screw may have backed-off slightly due to vibration. under periodically The above valve's electrical terminations are checked its existing P. M. program. The valve is also checked quarterly under STP 0-65-1 and monthly under STP-07.

i9'1J 208