ML20086K396

Telecopy AO 75-15:on 750210,setpoint Shift Found on Recirculation Pump DPIS-2-2-138A.Caused by Setpoint Shift. Cam Follower Replaced & Properly Aligned.Switch Recalibr & Checked

ML20086K396
Person / Time
Site:	Peach Bottom
Issue date:	02/11/1975
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086K384	List: ML20086K381 ML20086K396
References
AO-75-15, NUDOCS 8401270067
Download: ML20086K396 (1)

Text

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• Peach Bottou Atomic Power Station (D8Lr B A U_ ld S C f Delta. Permsylvanin 17314 Februa ry 11. 1975

'r. Jamer. P. O'Reilly, Director itfice of Inrpcetion and Enforcement egion i

!ni ted St.tts.4 Nuclear Regulatory Coreission 131 Park Avenue

'iug of Prussia. Pennsylv.Ania

. 19406 Jubj e c_t : Abnormal Occurrence _24_-Ito_ur No ti ficat io_n ConfirninG. J. F. Franz' phone convernation with  !!r. L7 alt Daunack. Reginn 1 Nuclent l'egulator'/ Cor:minnion on February ll 1975.

Reference:

License Nunber DPR-44 Technical Specification Reference Tabic 3.2.B Report No. : $0-277-75-1$

Report Dater February 11. 1975 Occurrence Date: February 10. 1975 Facility: Peach Botcom Atomic Power Station R.D. 1. Dc.lta, Pennsylvanic 17314 Identification of Occurrenco:

Setpoint shifr. on dPIS-2-2-138A. Recire. Pump AP 4o LPCI loop selection logic.

Conditionu Prior to Occurrence:

Unit 2 at 90% power.

Description of Occurrence:

During routine instrument surveillance testing, dP15-2-2-138A vao found to trip at 0.9 puid. The Technical Specification limit is 2 paid +1. _

Designation of Apparent Cause of Occurrence:

Setpoint shift.

Analynis of occurrence:

This tainor setpoint shift has minical snicty implications since it is part of a one-of-tvo-twice logic and in also redundant in the other LPCI systen.

Correc tive i.etion:

The ca= follower uns found to be unsaticfactory, repinceit, and properly alir.ned.

The nuitch was recalibrcted and checked for proper calibration per the applicable surveillance test.

Failure Data:

Thir. is the firi:t failure of this type on svitchen in this service.

• 'erv trul" yours.

8401270067 750220 PDR ADOCK 05000277 MEMW ,.

• Y ! S PDR

t. T. Ullrich, Superintendent REGULATORY OPERATIONS Peach botton Atotic Power Station 16 > FILE DJPY