ML20086J502

Telecopy AO 74-4:on 740825,RCIC/HPCI Flow Test Valve MO-31 Failed to Operate.Caused by Mechancial Difficulty in Valve Motor Contractor.Small Burrs on Contact Pivot Shaft Removed & Contractor Reassembled

ML20086J502
Person / Time
Site:	Peach Bottom
Issue date:	08/26/1974
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086J500	List: ML20086J497 ML20086J502
References
AO-74-4, NUDOCS 8401240042
Download: ML20086J502 (1)

Text

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17314 August 26, 1974 g' 'y*

Mr.JcuesP.O'ReilhDirector Unite.d States Ato=ic Energy Comission O -

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Directorate of Regulatory Operations 631 hrk Avento 'JT.6 Kinh of Prussia, Penneylvania 19',06 Q%..? -..

Subje .,: Abnorm 1 Occurrence 24-Hour Notification . Q.~ ]

Confirning W. T. Ullrich's phone conversation with Mr. R. A. Feil, f.:.M. s A.E.C. Region 1 Regulatory Operations Office on August 26, 1974. -[,Q..

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Reference:

Liccar.t Number DPP.-56 3,g gg h:Ww n Technical Specifiention g. v .,..

Report No. : 50T- /E-74;4-MEY Report Date: Au:;ust-26, 1974 -iS Occurrence Date: August 25, 1974 Mh/i -9 Facility: Peach Botton Ateni Power Station f p. ,

R.D. 1, Delta, Pennsylvanin 17314 i. <> , .4= y;:

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Identification of Occurrence: y_ .

J Failura of RCIC/IIPCI Flow Tcat valve to operato Qa}-31) rs i. V Conditions Prior to Occurrence:

Reactor at approxicately 1% paver. Startup testing in progress. -((. '/

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Dercription of Occurrene-: g Nj.

During startu; testir.; 'f the ECIC syntes, one of the two valves GD-31) %O3l, in the ficv test line m a the RCIC and HPCI system to the icrus could not tD;c be closed electrical 3 . gi) 7ff;g; Designation of Apparent Cause of Occurrence:

Hechanical dif ficulty in valve cotor contactor. #9 ^

s EI.YN Analyrin of occurrence: jsCp .'. .l Both the RCIC and HPCI have an independent valve in the pump flov test piping S,).; y to the tcrus. The valve in the comon return line from both systens is if-Q considered a back-up valve. Failure of this back-up valve to close on either g;fl4 system initiation has minimi cafety significance since the prinary valve would M,i:/

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succcasfully stop this flow. This is a normally closed valve which is only open during flov testing of system. %p;!")~

D: y.y Corrective Action:

The d.c. electrical contactor was disassembled and inspected. A cuall burr 62 Q van found on the contact pivot shaft. These burra vere renoved and the  %

contactor re-asserbled. The valve was successfully tested and returned to  %-9;'F .

service. Se.Wf

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. 7: M'-

Failure Data: 8401240042 740904 PDR ADOCK 05000278 Eone. S PDR Very truly yours, 44^ _

~* W. T. Ullrich, Superintendent jf- <

Peach Botton Atomic Power Station ju