ML20086L108

Telecopy AO 74-2:on 740108,switch LIS-2-3-231D Failed. Cause Under Investigation.Corrective Action to Be Determined

ML20086L108
Person / Time
Site:	Peach Bottom
Issue date:	01/09/1974
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086L107	List: ML20086L104 ML20086L108
References
AO-74-2, NUDOCS 8402070397
Download: ML20086L108 (2)

Text

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PHTTJ,nELM11A T3.!rtitic cur.mu -

Pe Ecttes Atomic Power Station -

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• Delth, Pennsylvania Q 17314

, January 9, 1974 p p g , g, d, ,

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kf3 3 7 -k[O l'.r. Jares P. O'Reilly, Dirc: tor 11pited States Atonic Targy Co:niecion Directorate of Rc5ulatory Operations "d h [f['h V.

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631 Park Avenue 3940G 6.4I g A-King of Prussio, l'ennsylvania O .f.

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?.ubject. Abnor 91 Occurrence 24 Hour Notification

• -Confirning zy telephone converration with lir. Tom Shedlowsky, A.E.C.%j'"=tf. @

- Regio

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Ergulatory Office on Janur.ry 9,1974, dhI License Naeber DPR-%, Anendnent Number 1, jQ, EcTerenec' Technical Specifiention hble 31.1 , c (.j;

! J. "-ll J.l 1...;.fl Eeport No. 50-2??-?k- 2 1-9-74

'l.lg i 1 Report ibte: -

• =W Occurrenee Datc: 1-8-7 4 '

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Ihcility Peach Bottom Atomic Power Station - Unit 2 R.L.1, Delta, Pennsylvania 17314 Identifiestion of occurrence: Failure of LIS-2-3-231D which provides a Titsh Discharg input to the FJ'E logic. ,

Conditiona Prinr to Occurrence: Reactor critical and vented at 160 F reactor coolant te: .

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ed o trip during a surteillance tent. ,

Designstion of Apparent Csuse of Occurrence :Manufecturer's representative is due on cite Under investigation. faitch operated succeaafully after cover was recsved.

thia favestigation.

Friction incide the cwitch ecchanism is nuepected. .

Analysis of Occurrence:

Failure of a. cingle cvitch to function inon Scram 'a hione of two twice h dischsrge volumelogic veulddoen not C

render the logic system inoperable.have occurreit No with safetythis witch inop lenbge occurred. Valve leakage at this time is negligible.

implicatione are an=ccisted with this occurrence.

Corrective Action:

Fot detemined at thic time. Reactor van shutdown at 5:00 pop.onIN74 whi2 t: investi 6ation continues. '

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Failure Data- . , #)' , _.

Thir, particular evitch has failed on other oconaions.

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1o in. . .no weie3 min.Ls an uaan R0 Chief, FS6EB

• RO:llQ (5) ,

ut, PEACl! BOTTOM 1 RO Files /

Central !! ail 6 Files A0 74-2 iO (Norn. and unsti m1TIAL5 REMAAKS Regulatory Standards (3)

Directorate of The above abnormal occurrence is forwarded for Licensing (l3) u,, informatio,.

OGC Distribution will be made by this Ret,lonal Directors t o (s.<n. .<io unm of fice to the PDR, Local PDR, NSIC, DTIE, and ma.us atuaans (II, III, IV)

State Representatives after review by the urE licensee for proprietary information.

F ROM (Narre and unit) , gung,3 a

Y E. J. Brunner Region I PHONE m carg 8-337-1246 1/16/f4 USE OTHER StPE F08t ADplTional ptuang

. , , CIO : 1,71 0 - 443-44, h

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