ML20086L139

Telecopy AO 73-25:on 731121,setpoint Shift Found on Reactor Low Level Switch LIS-2-2-3-101B.Cause Under Investigation. Corrective Action to Be Determined

ML20086L139
Person / Time
Site:	Peach Bottom
Issue date:	11/21/1973
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
AO-73-25, NUDOCS 8402070410
Download: ML20086L139 (1)

Text

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Er. Jares P. O'Reilly, Director h United Statec Atomic Pnergy Cor-iccion t Directorate of Regulatory Operationc 631 Park Avenue g'C *7g 7 l King of PntSEie, Penncylvimic 19406  :

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object: Abnorral Occurrence 24-Hour Notifiention i;

. Confirr.ing my tolophone convercation with you on Nove:ber 21, 1973 l

Reference:

License Nueber DPR-44 Amend.ent. Number 1  !

Technical Specification Table 3 2.A f On Nove:bcr 21, 1973 with the reactor chutdown surveillance teste identified [

n setpoint drift on a reactor lov level cvitch (LIS-2-2-3-1013). This j witch is used in a one-of-two-tvice logic in the reactor scrac circuitry.  ;

The ac-found cetpoint wac 3.43 inchen below the lititing setting (? O inches). {

'ho other cetpoint chifte have previoucly been noted on citilar type evitchec. 5 Inve.ntigation is in progress. No cafety implicatione are accociated with thic I failure since the circuitry would have operated properly from the ressining f evitches. More frequent testing is conte plated. {

i fWYY V. T. Ullrich, Superintendent .

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TO (Name a, o wants in TaALs RtMARas R0 Chief, FS6EB PHILADELPIIIA ELECTRIC COMPANY ,

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R0 Files Dart PEACH BOTTOM 2 DN-50-277 Central Fbil & Files Regtilatorv .'itandards (3) A0 # 73/25 TO (Name and unit) INITIAL $ REMARKS Directorate of The above abnormal occurrence is forwarded Licensing (13)

OCC DATE f r information. Distribution will be made Regional Directors (R0 II , TT T , TV) by this office to the PDR, Local PDR, NSIC, TO (Name and unit) INITIALS REMARKS DTIE, and State Representatives.

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F. .i . B runn e r Region I PHONE NO. DATE 8-337-1246 11/29/7')

USE OTHER $10E FOR ADDifiomaL RtgARKS +

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