ML20086H046

Telecopy AO 75-72:on 751126,core Spray Full Flow Test Valve MO-3-14-26A Failed to Close.Caused by Broken Wire on Closing Torque Switch in Valve Operator.Broken Wire Repaired & Proper Valve Operation Verified

ML20086H046
Person / Time
Site:	Peach Bottom
Issue date:	11/26/1975
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086H045	List: ML20086H041 ML20086H046
References
AO-75-72, NUDOCS 8401130370
Download: ML20086H046 (1)

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• !. PHILADELPHIA ELECTRIC COMPANY jg/

Peach Bottor. Ato=ic. Power Station

,. ". j Delta. Pennsylvanin 1731h

' November 26, 1975 l

Mr. Jame s P. O'Reilly, Director L Office of Inspection and.Inforcement

.- ' Region 1

,' jUnited Statec Suelear Regulatory Co=cission 1,,631 Park Avenue ~

,,,, Ki~ng of Prussia. Pennsylvania 19406 S. bJer.t r. Abner =al Occuaranee PL-Hour E ot i fi _c at i on

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"'echnical Specification

Reference:

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JReport 53.: 50-273-75-72

, .l i P.ep ort Date: November 26, 1975

't 10ccurrence Date: Nove=ber 26, 1975 ~~

i L' Facility: Peach Botto= Ato=ic Power Station

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R.3. 1, Delt a,. Pennsylvania 1731.

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• Jdent.!fication of Occurrecee:

MO-3-1t-26A, Core Spray yull Flow Test Valve failed to close-

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, Oonditions Prior to Occurrence:

1 i, : Unit 3 operatir.; at ST' Power. .

! Description of Occurrencer

.I During the perfor=ance of surveillance testing, MC-3-1L-26A failed tr close fully with the 'A' and 'C' core spray pu=ps running at rated

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Designation of Apparent Cause of Occurretec:

, ,' Broken wire on the closing torque'svitch in the valve op e rat.6r -

i P Analysis of Occurrence:

.' The subject. valve is only used during perro: =ance of the Core Opray surveillance test. It is nor= ally closed when the cyste= is in

,,- This failure is only significant during surveillance testi; standby.

.# and was identified during the surveillanr e test. I==ediate- repair

,," ' of the deficiency =ini=ises the cafety si6nificance of this event.

' "8 Corrective Actio:i:

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The broken wire was repaired and proper valve operation verifJc:1.

L '. 1 Failure Data:

) ,. l' }, A previous failure of this type was reported as Abnor=al Occurrence

.  !. Beport Su=ber 50-278-75-51.

• ' .l ; Very truly yours,

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l+ - *Af*f $8. M

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W. T. Ullrich, Superintendent

~l Peach Botto: Atc=ic Power Station

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8401130370 751205 PDR ADOCK 05000278 ' -

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