ML20086K416

Telecopy AO 75-14:on 750205,recirculation Sys Sample Valve AO-2-39 Failed to Fully Close.Cause Unknown.Switch Will Be Inspected During Next Outage

ML20086K416
Person / Time
Site:	Peach Bottom
Issue date:	02/06/1975
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086K411	List: ML20086K408 ML20086K416
References
AO-75-14, NUDOCS 8401270078
Download: ML20086K416 (1)

Text

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glLADELPHIAELECTRICCOMPANY Feach Bottoss Atoatic Power Station _

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1. WFO

\ Delta, Pennsylvania ..

17314 Qr. James P. O'Reilly, Director Waited States Atomic Energy Cossaission .

Ihnelace 2egulatory Constission -

b31 Park Avenue King of Prussia, Pennsylvania 19405 . . _ . __ ]_ __

OuMeet: Abnormal Occurrence 24 Hour Notification l Confirming W. T. U11 rich's conversation with Mr. Walt Baunack, A.E.C. Region 1 Nucicer Regulatory Commission on February 6, 1975.

geforance: License Number VPR-44 Technical Specification

Reference:

3.nii Coport No.: 50-277-75-14 Report Dates February 6, 1975 Occurranc,e Date: February 5, 1975 Facility: Fesch Bottom Atomic Power Station R.D. 1. Delta. Pennsylvania 17314 Identification of Occurrence -

Unit 2 Recirculation System Sample valve, A0-2-39, failure to fully. slose.

Conditions Prior to Occurrence: -

Plant at 99.5% power. , .

3cocription of occurrence Following completion of sampling, the switches for the Recirculation System esmple valves, A0-2-39 and A0-2-40, were placed in the closed position. It waa cbsorved that the indicating lamps showed the valve A0-2-39 had not fully closed.

Cycling of the valva while observing the flow at the sampling station confirmed that the valve was not fully closing.

De::ignation of ' Apparent Cause of Occurrencer Unknown, but +ould be excessive packing friction.

Analysio of Occurrence:

he safety implication of,this failure is minimal because the other redundant valva in series with AO-2-$9 did fully close and would have isolated if necessary.

Corroctive Actions -

Further opening and closing of A0-2-39 resulted in stopping flow completely,'but the indicating lamps were still incorrect. The limit switches for this valve will be inspected during the next outage.

Fcituto Data 8401270078 750215 A0-278-74-23. PDR ADOCK 05000277 S PDR Vory truly yours. -

NlW~l W. T. Ullrich, superintendent ' ,

Pcach Botton Atomic Power Station REGULATORY OPERATIONS FILE COPi,